Psidium guajava L., Myrtaceae

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Present on Pacific Islands?  yes

Threat only at high elevations?  no

Risk assessment results:  High risk, score: 21 (Go to the risk assessment)

Common name(s): [more details]

Carolinian: abwas

Chamorro: abas, abas, abas guayaba, abas guayaba

Chuukese: kuafa

English: common guava, guava

Fijian: ngguava, ngguava ni India, quwawa

French: goyave, goyavier

Hawaiian: kuawa, kuawa ke‘oke‘o, kuawa lemi, kuawa momona, pauwa

Hindi: amrut

I-Kiribati: te kuava, te kuawa, te kuwawa

Kosraean: kuhfahfah

Maori (Cook Islands): tū‘ava, tuava, tūava, tūava, tūava, tuava ‘enua, tūvava

Nauruan: kuwawa

Niuean: kautoga, kautoga taane, kautoga tāne, kautonga, kautonga, kautonga tāne, lala

Palauan: guabang, kuabang

Pohnpeian: guahva, kuahpa, kuahpa

Pukapukan: tuava

Rakahanga-Manihiki: tuava, tuava

Samoan: ku‘ava, ku‘ava, kuava, kuava

Spanish: apas, guayaba, guayabo

Tahitian: tūava, tuava, tumu tuava, tūvava, tuvava

Tongan: kuava

Tongarevan: tūava

Tuvaluan: ku‘ava

Yapese: abas, abas guayaba

Habit:  tree

Description:  "A shrub or small tree; bark smooth, light reddish-brown, with pubescent 4-angled young branches; leaves opposite, ovate-elliptic or oblong-elliptic, acute-acuminate, pubescent beneath, often rather brittle, prominently nerved, lateral nerves 10-20 pairs; blades mostly 7-15 cm long and 3-5 cm wide, rounded at base, dull green; flowers solitary or 2-4 together in leaf axils, rather large (2.5 cm wide); peduncle about 1-2 cm long, pubescent; calyx 4-5-lobed (anthesis, not before) about 6-8 mm long, petals white, 10-15 mm long, fugacious, usually 4 or 5, obovate, slightly concave, stamens numerous (c. 200-250), white, about as long as petals; style 10-12 mm long, stigma peltate, fruit globose, ovoid, or pyriform, whitish-yellow or faintly pink, sweet-sour pulpy, many-seeded, 2.5-10 cm long; pulp granular-juicy; seeds yellowish, reniform" (Stone, 1970; pp. 454-455).

Habitat/ecology:  This evergreen tree reaches heights of 8 m. It invades disturbed sites and forms dense thickets. Cultivated in gardens but often escaped and naturalized where introduced.  Common on abandoned fields (C. W. Smith, 1985; p. 200). " A major problem in pastures, roadsides and forest planting, and is also common in plantations, but not in cultivation"  (Swarbrick, 1997; p. 18).  In Hawai‘i, "naturalized and often forming dense stands in disturbed dry, mesic, and wet forest, 15-1,220 m"  (Wagner et al., 1999; p. 972).  In Fiji, "An abundantly naturalized tree or shrub 1-10 m high from near sea level to about 800 m, often forming dense thickets in waste places, along roadsides, and in pastoral, arable, and plantation land"  (A. C. Smith, 1985; pp. 307-308).  In Niue, "a common or very common species in scrub and open secondary forest in most areas"  (Sykes, 1970; p. 131). In New Caledonia, "est vite devenu un fléau dans les pâturages. Planté à Lifou par Deplance (1864) et aujourd'hui souvent spontané aux îles Loyauté, où il est moins envahissant que sur la Grande-Terre" (MacKee, 1994; p. 106). In the Galápagos Islands, "common in the more mesic forests of the larger islands" (Wiggins & Porter, 1971; p. 708).

Propagation:  The seeds are dispersed by frugivorous birds as well as rats and feral pigs.  "The seeds are spread by birds and fruit bats and the plants regrow from stumps and buds along damaged roots."  (Swarbrick, 1997; p. 18)

Native range:  Tropical America, introduced early to Guam by the Spanish, thence to the Philippines and throughout Asia (Stone, 1970; pp. 454-455).

Presence:

Pacific
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
American Samoa Manu‘a Islands	Ofu Island	introduced invasive	Space, James C./Flynn, Tim (2000) (p. 40)
American Samoa Manu‘a Islands	Ofu Island		Whistler, W. A. (1990) Voucher cited: Whistler 3460
American Samoa Manu‘a Islands	Olosega Island	introduced invasive	Space, James C./Flynn, Tim (2000) (p. 43)
American Samoa Manu‘a Islands	Ta‘u Island	introduced invasive	Space, James C./Flynn, Tim (2000) (p. 47)
American Samoa Manu‘a Islands	Ta‘u Island		Whistler, W. A. (1990) Vouchers cited: Yuncker 9293, Whistler 3147
American Samoa Manu‘a Islands	Ta‘u Island		Bishop Museum (Honolulu) (1939) (voucher ID: BISH 166360) Taxon name on voucher: Psidium guajava L.
American Samoa Manu‘a Islands	Ta‘u Island		Bishop Museum (Honolulu) (1975) (voucher ID: BISH 430214) Taxon name on voucher: Psidium guajava L.
American Samoa Tutuila Islands	Tutuila Island	introduced invasive	Space, James C./Flynn, Tim (2000) (p. 37)
American Samoa Tutuila Islands	Tutuila Island		Whistler, W. A. (1980) (p. 131)
Australia (Pacific offshore islands) Lord Howe Island	Lord Howe Island	introduced	Pickard, J. (1984) (p. 207)
Australia (Pacific offshore islands) Lord Howe Island	Lord Howe Island	introduced invasive	Orchard, Anthony E., ed. (1994) (p. 20) "Spread by birds or cattle; potentially a serious weed". Voucher cited: A.C. Beauglehole 5854 (NSW)
Australia (Pacific offshore islands) Norfolk Islands	Norfolk Island	introduced invasive	Orchard, Anthony E., ed. (1994) (p. 9) "Spread by birds or cattle; potentially a serious weed". Vouchers cited: M. Lazarides 8025 (CANB, K), G. Uhe 1115(K)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Anatahan Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Anatahan Island	introduced invasive	Fosberg, F. R./Falanruw, M. V. C./Sachet, M.-H. (1975) (p. 35) Voucher cited: Falanruw 1673 (US)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Pagan Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Pagan Island	introduced invasive	Fosberg, F. R./Falanruw, M. V. C./Sachet, M.-H. (1975) (p. 35) Voucher cited: Anderson 509 (US, BISH, Fo)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Pagan Island		Bishop Museum (Honolulu) (1984) (voucher ID: BISH 635227) Taxon name on voucher: Psidium guajava L.
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Pagan Island		Bishop Museum (Honolulu) (1984) (voucher ID: BISH 1000085) Taxon name on voucher: Psidium guajava L.
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Rota Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Rota Island		Bishop Museum (Honolulu) (1978) (voucher ID: BISH 438433) Taxon name on voucher: Psidium guajava L.
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Rota Island		Bishop Museum (Honolulu) (1966) (voucher ID: BISH 653182) Taxon name on voucher: Psidium guajava L.
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Saipan Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Sarigan Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Sarigan Island	introduced invasive	Fosberg, F. R./Falanruw, M. V. C./Sachet, M.-H. (1975) (p. 35) Evans 2366 (US, BISH, Fo, NY)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Sarigan Island		Bishop Museum (Honolulu) (1966) (voucher ID: BISH 401423) Taxon name on voucher: Psidium guajava L.
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Tinian Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Commonwealth of the Northern Mariana Islands (US) Northern Mariana Islands	Tinian Island		Bishop Museum (Honolulu) (1946) (voucher ID: BISH 571608) Taxon name on voucher: Psidium guajava L.
Cook Islands Northern Cook Islands	Manihiki Atoll		McCormack, Gerald (2007)
Cook Islands Northern Cook Islands	Penrhyn (Tongareva) Island		McCormack, Gerald (2007)
Cook Islands Northern Cook Islands	Pukapuka Atoll		McCormack, Gerald (2007)
Cook Islands Northern Cook Islands	Rakahanga Atoll		McCormack, Gerald (2007)
Cook Islands Southern Cook Islands	Aitutaki Atoll		McCormack, Gerald (2007)
Cook Islands Southern Cook Islands	Aitutaki Atoll	introduced invasive	Space, James C./Flynn, Tim (2002) (p. 9)
Cook Islands Southern Cook Islands	‘Atiu Island		McCormack, Gerald (2007)
Cook Islands Southern Cook Islands	‘Atiu Island	introduced invasive	Space, James C./Flynn, Tim (2002) (p. 9)
Cook Islands Southern Cook Islands	Mangaia Island		McCormack, Gerald (2007)
Cook Islands Southern Cook Islands	Mangaia Island	introduced invasive	Space, James C./Flynn, Tim (2002) (p. 9)
Cook Islands Southern Cook Islands	Mangaia Island		Bishop Museum (Honolulu) (1928) (voucher ID: BISH 166371) Taxon name on voucher: Psidium guajava L.
Cook Islands Southern Cook Islands	Ma‘uke Island		McCormack, Gerald (2007)
Cook Islands Southern Cook Islands	Ma‘uke Island	introduced invasive	Space, James C./Flynn, Tim (2002) (p. 9)
Cook Islands Southern Cook Islands	Miti‘aro Island		McCormack, Gerald (2007)
Cook Islands Southern Cook Islands	Miti‘aro Island	introduced invasive	Space, James C./Flynn, Tim (2002) (p. 9)
Cook Islands Southern Cook Islands	Palmerston (Avarau) Island		McCormack, Gerald (2007)
Cook Islands Southern Cook Islands	Rarotonga Island		McCormack, Gerald (2007)
Cook Islands Southern Cook Islands	Rarotonga Island	introduced invasive	Space, James C./Flynn, Tim (2002) (p. 9)
Cook Islands Southern Cook Islands	Rarotonga Island		Bishop Museum (Honolulu) (1929) (voucher ID: BISH 166372) Taxon name on voucher: Psidium guajava L.
Cook Islands Southern Cook Islands	Rarotonga Island		Bishop Museum (Honolulu) (1977) (voucher ID: BISH 420140) Taxon name on voucher: Psidium guajava L.
Ecuador (Galápagos Islands) Floreana Group	Floreana Island	introduced invasive cultivated	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) Isabela Group	Volcan Alcedo	introduced invasive cultivated	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) Isabela Group	Volcan Sierra Negra	introduced invasive cultivated	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) San Cristóbal Group	San Cristóbal Island	introduced invasive cultivated	Charles Darwin Research Station (2005)
Ecuador (Galápagos Islands) Santa Cruz Group	Santa Cruz Island	introduced invasive cultivated	Charles Darwin Research Station (2005)
Federated States of Micronesia Chuuk Islands	Fefan Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Federated States of Micronesia Chuuk Islands	Fefan Island	introduced	Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane/Mazawa, Thomas R. (2000) (p. 29)
Federated States of Micronesia Chuuk Islands	Tol Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Federated States of Micronesia Chuuk Islands	Tol Island	introduced	Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane/Mazawa, Thomas R. (2000) (p. 29)
Federated States of Micronesia Chuuk Islands	Weno (Moen) Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Federated States of Micronesia Chuuk Islands	Weno (Moen) Island	introduced	Space, James C./Waterhouse, Barbara/Denslow, Julie S./Nelson, Duane/Mazawa, Thomas R. (2000) (p. 29)
Federated States of Micronesia Kosrae Island	Kosrae Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	introduced	Glassman, S. F. (1952) (p. 61)
Federated States of Micronesia Pohnpei Islands	Pohnpei Island	introduced cultivated	Lorence, David H./Flynn, Tim (1998) (p. 25)
Federated States of Micronesia Pohnpei Islands	Pohnpei Island		Bishop Museum (Honolulu) (1946) (voucher ID: BISH 571609) Taxon name on voucher: Psidium guajava L.
Federated States of Micronesia Pohnpei Islands	Pohnpei Island		Bishop Museum (Honolulu) (1978) (voucher ID: BISH 653172) Taxon name on voucher: Psidium guajava L.
Federated States of Micronesia Yap Islands	Ulithi Atoll	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Federated States of Micronesia Yap Islands	Ulithi Atoll		Bishop Museum (Honolulu) (1965) (voucher ID: BISH 81684) Taxon name on voucher: Psidium guajava L.
Federated States of Micronesia Yap Islands	Yap (Waqab) Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Federated States of Micronesia Yap Islands	Yap (Waqab) Island		Bishop Museum (Honolulu) (1948) (voucher ID: BISH 166400) Taxon name on voucher: Psidium guajava L.
Fiji Fiji Islands	Lakemba Island	introduced invasive	Smith, Albert C. (1985) (pp. 307-308) Voucher cited: Garnock-Jones 817
Fiji Fiji Islands	Ovalau Island	introduced invasive	Smith, Albert C. (1985) (pp. 307-308) Voucher cited: DA 1341
Fiji Fiji Islands	Rotuma Island		Bishop Museum (Honolulu) (1938) (voucher ID: BISH 618539) Taxon name on voucher: Psidium guajava L.
Fiji Fiji Islands	Vanua Levu Island	introduced invasive	Smith, Albert C. (1985) (pp. 307-308) Vouchers cited: DA 8737, Bierhorst F78
Fiji Fiji Islands	Vanua Mbalavu Island	introduced invasive	Smith, Albert C. (1985) (pp. 307-308) Voucher cited: Garnock-Jones 1085
Fiji Fiji Islands	Viti Levu Island	introduced invasive	Smith, Albert C. (1985) (pp. 307-308) Vouchers cited: Greenwood 352, DA 10702, Smith 6079, H.B.R. Parham 125, DA 11294, Valentine 15, Valentine 16, DA 10598, DA 3698
Fiji Fiji Islands	Viti Levu Island		Bishop Museum (Honolulu) (1955) (voucher ID: BISH 14870) Taxon name on voucher: Psidium guajava L.
Fiji Fiji Islands	Viti Levu Island		Bishop Museum (Honolulu) (1937) (voucher ID: BISH 166401) Taxon name on voucher: Psidium guajava L.
French Polynesia Marquesas Islands	Hiva Oa Island		Bishop Museum (Honolulu) (1988) (voucher ID: BISH 1000520) Taxon name on voucher: Psidium guajava L.
French Polynesia Marquesas Islands	Marquesas Islands		? (year unknown)
French Polynesia Marquesas Islands	Nuku Hiva (Nukahiva) Island		Bishop Museum (Honolulu) (1982) (voucher ID: BISH 555117) Taxon name on voucher: Psidium guajava L.
French Polynesia Society Islands	Bora Bora Island		Bishop Museum (Honolulu) (1993) (voucher ID: BISH 658473) Taxon name on voucher: Psidium guajava L.
French Polynesia Society Islands	Huahine Island		Fosberg, F. R. (1997) (p. 82)
French Polynesia Society Islands	Huahine Island		Bishop Museum (Honolulu) (1979) (voucher ID: BISH 619015) Taxon name on voucher: Psidium guajava L.
French Polynesia Society Islands	Maupiti (Maurua) Island	introduced invasive cultivated	Fosberg, F. R./Sachet, M.-H. (1987) (p. 53) Voucher cited: Morris 24 (US)
French Polynesia Society Islands	Maupiti (Maurua) Island		Bishop Museum (Honolulu) (1985) (voucher ID: BISH 614966) Taxon name on voucher: Psidium guajava L.
French Polynesia Society Islands	Moorea Island	introduced invasive cultivated	Welsh, S. L. (1998) (p. 200) Vouchers cited: Florence 4918
French Polynesia Society Islands	Moorea Island		Bishop Museum (Honolulu) (1983) (voucher ID: BISH 492585) Taxon name on voucher: Psidium guajava L.
French Polynesia Society Islands	Raiatea (Havai) Island	introduced invasive cultivated	Welsh, S. L. (1998) (p. 200) Vouchers cited: BRY 25416, BRY 26484, BRY 26644
French Polynesia Society Islands	Taha‘a Island		Fosberg, F. R. (1997) (p. 82)
French Polynesia Society Islands	Tahiti Island	introduced invasive cultivated	Welsh, S. L. (1998) (p. 200) Vouchers cited: Florence & Birnbaum 9775, BRY 26020
French Polynesia Society Islands	Tahiti Island		Bishop Museum (Honolulu) (1988) (voucher ID: BISH 601585) Taxon name on voucher: Psidium guajava L.
French Polynesia Tuamotu Archipelago	Manihi Atoll	introduced cultivated	Sachet, M-H. (1983) (p. 32) Voucher cited: Brooks & Brooks 34 (BISH)
French Polynesia Tubuai (Austral) Islands	Raivavae (Raevavae) Island		Bishop Museum (Honolulu) (1983) (voucher ID: BISH 553672) Taxon name on voucher: Psidium guajava L.
French Polynesia Tubuai (Austral) Islands	Rapa Island		Bishop Museum (Honolulu) (1984) (voucher ID: BISH 493227) Taxon name on voucher: Psidium guajava L.
French Polynesia Tubuai (Austral) Islands	Rurutu Island		Bishop Museum (Honolulu) (1983) (voucher ID: BISH 552836) Taxon name on voucher: Psidium guajava L.
French Polynesia Tubuai (Austral) Islands	Rurutu Island		Bishop Museum (Honolulu) (1983) (voucher ID: BISH 553146) Taxon name on voucher: Psidium guajava L.
Guam Guam Island	Guam Island	introduced invasive cultivated	Stone, Benjamin C. (1970) (pp. 454-455) Vouchers cited: Stone 3900 (GUAM), Stone 5130 (GUAM)
Guam Guam Island	Guam Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Guam Guam Island	Guam Island		Bishop Museum (Honolulu) (1919) (voucher ID: BISH 166391) Taxon name on voucher: Psidium guajava L.
Guam Guam Island	Guam Island		Bishop Museum (Honolulu) (1916) (voucher ID: BISH 166392) Taxon name on voucher: Psidium guajava L.
Guam Guam Island	Guam Island		Bishop Museum (Honolulu) (1911) (voucher ID: BISH 166393) Taxon name on voucher: Psidium guajava L.
Guam Guam Island	Guam Island		Bishop Museum (Honolulu) (year unknown) (voucher ID: BISH 166394) Taxon name on voucher: Psidium guajava L.
Guam Guam Island	Guam Island		Bishop Museum (Honolulu) (1918) (voucher ID: BISH 166395) Taxon name on voucher: Psidium guajava L.
State of Hawaii Hawaiian Islands	Hawai‘i (Big) Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 972)
State of Hawaii Hawaiian Islands	Kaho‘olawe Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 972)
State of Hawaii Hawaiian Islands	Kaua‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 972)
State of Hawaii Hawaiian Islands	Lāna‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 972)
State of Hawaii Hawaiian Islands	Maui Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 972)
State of Hawaii Hawaiian Islands	Moloka‘i Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 972)
State of Hawaii Hawaiian Islands	Ni‘ihau Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 972)
State of Hawaii Hawaiian Islands	O‘ahu Island	introduced invasive cultivated	Wagner, Warren L./Herbst, Derral R./Sohmer, S. H. (1999) (p. 972)
Japan (offshore islands) Bonin (Ogasawara) Islands	Bonin (Ogasawara) Islands	introduced invasive	Toyoda, Takeshi (2003) (p. 285) Naturalized
Japan (offshore islands) Bonin (Ogasawara) Islands	Bonin (Ogasawara) Islands	introduced	Kato, Hidetoshi (2007)
Kiribati Banaba Island	Banaba (Ocean) Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Kiribati Line Islands	Tabuaeran (Fanning) Atoll	introduced cultivated	Wester, Lyndon (1985) (p. 28)
Kiribati Line Islands	Teraina (Washington) Island	introduced cultivated	Wester, Lyndon (1985) (p. 28)
Kiribati Tungaru (Gilbert) Islands	Tarawa Atoll		Swarbrick, John T. (1997) (p. 96) Cultivated? Presence not verified.
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll	introduced cultivated	Whistler, W. A./Steele, O. (1999) (p. 101)
Marshall Islands Ralik Chain	Kwajalein (Kuwajleen) Atoll		Bishop Museum (Honolulu) (1966) (voucher ID: BISH 426299) Taxon name on voucher: Psidium guajava L.
Marshall Islands Ratak Chain	Arno Atoll	introduced cultivated	Vander Velde, Nancy/Vander Velde, Brian (2007) (p. 10) "Rare; single tree planted in front of former R&D farm".
Marshall Islands Ratak Chain	Majuro (Mãjro) Atoll	introduced cultivated	Vander Velde, Nancy (2003) (p. 111)
Nauru Nauru Island	Nauru Island	introduced invasive	Meyer, Jean-Yves (2000) (p. 99)
Nauru Nauru Island	Nauru Island	introduced invasive cultivated	Thaman, R. R./Fosberg, F. R./Manner, H. I./Hassall, D. C. (1994) (pp. 174-175) Vouchers cited: Fosberg 58650 (US), Fosberg 58767 (US), Scully 105N (US), Thaman & Manner 94 (SUVA)
Nauru Nauru Island	Nauru Island		Bishop Museum (Honolulu) (1978) (voucher ID: BISH 438359) Taxon name on voucher: Psidium guajava L.
Nauru Nauru Island	Nauru Island		Bishop Museum (Honolulu) (1978) (voucher ID: BISH 438360) Taxon name on voucher: Psidium guajava L.
Nauru Nauru Island	Nauru Island		Bishop Museum (Honolulu) (1978) (voucher ID: BISH 438364) Taxon name on voucher: Psidium guajava L.
New Caledonia Îles Loyauté (Loyalte Islands)	Île Lifou	introduced invasive cultivated	MacKee, H. S. (1994) (p. 106) Voucher cited: Däniker3026 (Z)
New Caledonia New Caledonia	New Caledonia Islands	introduced invasive	Meyer, Jean-Yves (2000) (p. 99)
New Caledonia New Caledonia	New Caledonia Islands	introduced invasive cultivated	Gargominy, Oliver/Bouchet, Philipe/Pascal, Michel/Jaffre, Tanguy/Tourneu, Jean-Christophe (1996) (p. 382) Est vite devenu un fléau dans les pâturages.
New Caledonia New Caledonia Archipelago	Île Grande Terre	introduced invasive cultivated	MacKee, H. S. (1994) (p. 106) Vouchers cited: Pancher 9, Cribs 705, Guillaumin & Baumann 7572, MacKee 34592
New Caledonia New Caledonia Archipelago	Île Grande Terre		Bishop Museum (Honolulu) (1992) (voucher ID: BISH 654746) Taxon name on voucher: Psidium guajava L.
New Zealand (offshore islands) Kermadec Islands	Raoul Island	introduced invasive	Sykes, W. R. (1977) (p. 119)
New Zealand (offshore islands) Kermadec Islands	Raoul Island	introduced invasive	Webb, C. J./Sykes, W. R./Garnock-Jones, P. J. (1988) (p. 867) "On greatly modified terraces, forming large suckering thickets until recently; these have been eliminated and occasional young plants are now found only in the northern part of the island".
Niue Niue	Niue Island	introduced invasive	Sykes, W. R. (1970) (p. 131) Vouchers cited: CHR 170469, CHR 170473
Niue Niue	Niue Island	introduced invasive	Whistler, W. A. (1988) (p. 30)
Niue Niue	Niue Island	introduced invasive	Space, James C./Flynn, Tim (2000) (p. 25)
Niue Niue	Niue Island	introduced invasive	Whistler, W. A./Atherton, J. (1997) (p. 39)
Niue Niue	Niue Island	introduced invasive	Yuncker, T. G. (1943) (p. 90) Voucher cited: Yuncker 9650 (BISH) "Common throughout the island and one of the first to occupy newly cleared land"
Niue Niue	Niue Island	introduced invasive cultivated	Space, James C./Waterhouse, Barbara M./Newfield, Melanie/Bull, Cate (2004) (p. 12)
Palau Palau (main island group)	Angaur Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Palau Palau (main island group)	Angaur Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 88)
Palau Palau (main island group)	Babeldaob Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Palau Palau (main island group)	Babeldaob Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 86)
Palau Palau (main island group)	Koror Island	introduced	Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 192)
Palau Palau (main island group)	Koror Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 82)
Palau Palau (main island group)	Koror Island		Bishop Museum (Honolulu) (1967) (voucher ID: BISH 428562) Taxon name on voucher: Psidium guajava L.
Palau Palau (main island group)	Koror Island		Bishop Museum (Honolulu) (1967) (voucher ID: BISH 437999) Taxon name on voucher: Psidium guajava L.
Palau Palau (main island group)	Malakal Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 82)
Palau Palau (main island group)	Ngerkebesang Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 82)
Palau Palau (main island group)	Peleliu Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 90)
Palau Rock Islands	Bkul a Chesemiich Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 92)
Palau Rock Islands	Ngerchong Island	introduced invasive	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 92)
Palau Sonsorol Group	Sonsorol Island	introduced cultivated	Space, James C./Waterhouse, Barbara/Miles, Joel E./Tiobech, Joseph/Rengulbai, Kashgar (2003) (p. 94)
Papua New Guinea Papua New Guinea (eastern New Guinea Island)	Papua New Guinea (eastern New Guinea Island)		Waterhouse, D. F. (1997) (p. 64)
Pitcairn Islands Pitcairn Islands	Pitcairn Island	introduced invasive	Meyer, Jean-Yves (2000) (p. 103)
Pitcairn Islands Pitcairn Islands	Pitcairn Island	introduced	St. John, H. (1987) (p. 45) Vouchers cited: Ross 12, St. John 15038
Samoa Western Samoa Islands	Savai‘i Island	introduced invasive	Space, James C./Flynn, Tim (2002) (p. 8)
Samoa Western Samoa Islands	Savai‘i Island		Bishop Museum (Honolulu) (1929) (voucher ID: BISH 166359) Taxon name on voucher: Psidium guajava L.
Samoa Western Samoa Islands	Savai‘i Island		Bishop Museum (Honolulu) (1973) (voucher ID: BISH 417659) Taxon name on voucher: Psidium guajava L.
Samoa Western Samoa Islands	Upolu Island	introduced invasive	Space, James C./Flynn, Tim (2002) (p. 8)
Samoa Western Samoa Islands	Upolu Island		Bishop Museum (Honolulu) (1968) (voucher ID: BISH 28950) Taxon name on voucher: Psidium guajava L.
Samoa Western Samoa Islands	Upolu Island		Bishop Museum (Honolulu) (1894) (voucher ID: BISH 166358) Taxon name on voucher: Psidium guajava L.
Solomon Islands Solomon Islands	Solomon Islands		Swarbrick, John T. (1997) (p. 96)
Solomon Islands Solomon Islands	Solomon Islands	introduced invasive cultivated	Hancock, I. R./Henderson, C. P. (1988) (p. 103)
Tonga Ha‘apai Group	Ha‘ano Island	introduced invasive	Space, James C./Flynn, Tim (2001) (p. 8)
Tonga Ha‘apai Group	Lifuka and Foa Islands	introduced invasive	Space, James C./Flynn, Tim (2001) (p. 8)
Tonga Ha‘apai Group	‘Uiha Island	introduced invasive	Space, James C./Flynn, Tim (2001) (p. 8)
Tonga Tonga Islands	Tonga Islands	introduced invasive	Yuncker, T. G. (1959) (p. 200) "Occasional to frequent throughout Tonga".
Tonga Tonga Islands	Tonga Islands		Bishop Museum (Honolulu) (1969) (voucher ID: BISH 698740) Taxon name on voucher: Psidium guajava L.
Tonga Tongatapu Group	‘Eua Island	introduced invasive	Space, James C./Flynn, Tim (2001) (p. 8)
Tonga Tongatapu Group	‘Eua Island	introduced invasive	Yuncker, T. G. (1959) (p. 200) Large colonies.
Tonga Tongatapu Group	‘Eua Island		Bishop Museum (Honolulu) (1960) (voucher ID: BISH 166357) Taxon name on voucher: Psidium guajava L.
Tonga Tongatapu Group	‘Eua Island		Bishop Museum (Honolulu) (1979) (voucher ID: BISH 664374) Taxon name on voucher: Psidium guajava L.
Tonga Tongatapu Group	Tongatapu Island	introduced invasive	Space, James C./Flynn, Tim (2001) (p. 8)
Tonga Tongatapu Group	Tongatapu Island		Whistler, W. A. (1992) (p. 49) Voucher cited: Ilolahia 133
Tonga Tongatapu Group	Tongatapu Island	introduced invasive	Yuncker, T. G. (1959) (p. 200) Voucher cited: Yuncker 15112
Tonga Tongatapu Group	Tongatapu Island		Bishop Museum (Honolulu) (1953) (voucher ID: BISH 166356) Taxon name on voucher: Psidium guajava L.
Tonga Vava‘u Group	Niuatoputapu Island		Bishop Museum (Honolulu) (1976) (voucher ID: BISH 429123) Taxon name on voucher: Psidium guajava L.
Tonga Vava‘u Group	Vava‘u Island	introduced invasive	Space, James C./Flynn, Tim (2001) (p. 8)
Tuvalu Tuvalu (Ellis) Islands	Tuvalu Islands		Swarbrick, John T. (1997) (p. 96)
United States (other Pacific offshore islands) Wake Islands	Wake Island		Bishop Museum (Honolulu) (1998) (voucher ID: BISH 690626) Taxon name on voucher: Psidium guajava L.
Vanuatu New Hebrides Islands	Aneityum Island		Bishop Museum (Honolulu) (1986) (voucher ID: BISH 524023) Taxon name on voucher: Psidium guajava L.
Vanuatu New Hebrides Islands	Vanuatu (Republic of)		Swarbrick, John T. (1997) (p. 96)
Wallis and Futuna Wallis and Futuna (Horne) Islands	Wallis and Futuna Islands		Whistler, W. A. (1988) (p. 30)
Wallis and Futuna Wallis and Futuna (Horne) Islands	Wallis and Futuna Islands	introduced	Meyer, Jean-Yves (2000) (p. 107) "Potential invader". Lowlands.

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia Australia (continental)	Northern Territory	introduced invasive cultivated	Csurhes, S./Edwards, R. (1998) (pp. 192-193)
Australia Australia (continental)	Queensland	introduced invasive cultivated	Csurhes, S./Edwards, R. (1998) (pp. 192-193)
China China	China (People's Republic of)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 297)
Colombia Colombia	Colombia (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Costa Rica Costa Rica	Costa Rica (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Ecuador (Mainland) Ecuador	Ecuador (Republic of) (continental)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
El Salvador El Salvador	El Salvador (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Guatemala Guatemala	Guatemala (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Honduras Honduras	Honduras (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Japan Japan	Japan (country)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 297)
Mexico Mexico	Mexico (United Mexican States)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Nicaragua Nicaragua	Nicaragua (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Panama Panama	Panama (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Perú Perú	Perú (Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2007)
Thailand Thailand	Thailand (Kingdom of)		Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (pp. 297-298)

Indian Ocean
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
Australia (Indian Ocean offshore islands) Christmas Island Group	Christmas Island	introduced invasive cultivated	Swarbrick, J. T. (1997) (pp. 60, 125)
Australia (Indian Ocean offshore islands) Cocos (Keeling) Islands	Cocos (Keeling) Islands	introduced	Williams, D. G. (1994) (p. 23)
La Réunion (France) La Réunion Island	La Réunion Island	introduced invasive	MacDonald, I. A. W./Thebaud, C./Strahm, W. A./Strasberg, D. (1991) (pp. 51-61)
La Réunion (France) La Réunion Island	La Réunion Island	introduced invasive cultivated	Lavergne, Christophe (2006) "Cultivé/naturalisé"
Mauritius Mautitius Islands (Mauritius and Rodrigues)	Rodrigues Island	introduced	? (year unknown)

Also reported from
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
South Africa South Africa	South Africa (Republic of)	introduced invasive cultivated	Csurhes, S./Edwards, R. (1998) (pp. 192-193)

Comments:  A major invasive species in the Galápagos Islands.

A problem in Hawai‘i, the Marquesas (French Polynesia), New Caledonia and Fiji.

Very invasive in Tonga, especially on ‘Eua (Space & Flynn, 2001).

Common, and in the future may well become even more widespread in the Cook Islands (Space & Flynn, 2002).

The fruit is a host to fruit flies (Motooka et al., 2003).

Control: 

Physical: "Cattle tend to ignore the leaves except when they are under intensive grazing management and grazing very succulent forage; then they develop a craving for roughage.  Goats and sheep graze the leaves and strip the bark. Goats have been used to control guava at Kapapala Ranch on Hawai‘i (An Peischel)."  (Motooka et al., 2003).  "Controlled by cultivation.  Tolerant to fire and unpalatable to stock.  Small plants suppressed, but not killed, by slashing" (Swarbrick, 1997; pp. 28-29).

Chemical:  "Probably susceptible to: 1) foliar application of arboricides such as picloram, metsulfuorn-methyl, glyphosate, and triclopyr at standard rates and dilutions; 2) stem injections and cut stump application of the same herbicides; 3) soil applications of hexazinone, karbutilate, fluroxypyr and bromacil at standard rates" (Swarbrick, 1997; pp. 28-29). 

"Guava is sensitive to foliar applications of triclopyr, dicamba and 2,4-D at 1 lb/acre and to cut surface applications of concentrates of these herbicides; very sensitive to basal bark treatments of triclopyr ester and 2,4-D ester at 2% and 4% of product, respectively, in diesel or crop oil; very sensitive to soil-applied tebuthiuron at 2 lb/acre. Very sensitive to very-low volume basal bark applications of 20% triclopyr ester product in oil. A small-leafed shrubby form of guava appears to be tolerant of foliar applied herbicides but sensitive to tebuthiuron." (Motooka et al., 2003).

Additional information:  Information from the book "Weeds of Hawaii‘s Pastures and Natural Areas; An Identification and Management Guide" (Motooka et al., 2003). (PDF format).
Photos and additional information at University of Florida, Center for Aquatic and Invasive Plants.
Additional information at the Woody Plant Ecology web site.
Information from the Purdue University NewCROP web site.
Fact sheet from "Common forest trees of Hawaii" (PDF format).
Information from the World Agroforestry Centre's AgroForestryTree Database.

Additional online information about Psidium guajava is available from the Hawaiian Ecosystems at Risk project (HEAR).

Taxonomic information about Psidium guajava may be available from the Germplasm Resources Information Network (GRIN).

References:

Bishop Museum (Honolulu). 0. Voucher specimen #BISH 166394 (Thompson, J.B. 447).

Bishop Museum (Honolulu). 1894. Voucher specimen #BISH 166358 (Reinecke 131).

Bishop Museum (Honolulu). 1911. Voucher specimen #BISH 166393 (McGregor, R.C. 525).

Bishop Museum (Honolulu). 1916. Voucher specimen #BISH 166392 (Guerrero, J. 712).

Bishop Museum (Honolulu). 1918. Voucher specimen #BISH 166395 (Nelson, P. 71).

Bishop Museum (Honolulu). 1919. Voucher specimen #BISH 166391 (Nelson, P. 565).

Bishop Museum (Honolulu). 1928. Voucher specimen #BISH 166371 (Graham, J. 21).

Bishop Museum (Honolulu). 1929. Voucher specimen #BISH 166359 (Christophersen, E. 689).

Bishop Museum (Honolulu). 1929. Voucher specimen #BISH 166372 (Wilder, G.P. 1027).

Bishop Museum (Honolulu). 1937. Voucher specimen #BISH 166401 (Valentine, J.M. 15).

Bishop Museum (Honolulu). 1938. Voucher specimen #BISH 618539 (St.John, H. 19147).

Bishop Museum (Honolulu). 1939. Voucher specimen #BISH 166360 (Yuncker, T.G. 9293).

Bishop Museum (Honolulu). 1946. Voucher specimen #BISH 571608 (Fosberg, F.R. 24870).

Bishop Museum (Honolulu). 1946. Voucher specimen #BISH 571609 (Wong, C.C.Y. 66).

Bishop Museum (Honolulu). 1948. Voucher specimen #BISH 166400 (Wong, C.C.Y. 455).

Bishop Museum (Honolulu). 1953. Voucher specimen #BISH 166356 (Yuncker, T.G. 15112).

Bishop Museum (Honolulu). 1955. Voucher specimen #BISH 14870 (Parham, J.W. 9750).

Bishop Museum (Honolulu). 1960. Voucher specimen #BISH 166357 (Hotta, M. 5195).

Bishop Museum (Honolulu). 1965. Voucher specimen #BISH 81684 (Fosberg, F.R. 46475).

Bishop Museum (Honolulu). 1966. Voucher specimen #BISH 401423 (Evans, M. 2366).

Bishop Museum (Honolulu). 1966. Voucher specimen #BISH 426299 (Fosberg, F.R. 48064).

Bishop Museum (Honolulu). 1966. Voucher specimen #BISH 653182 (Evans, M. 2229).

Bishop Museum (Honolulu). 1967. Voucher specimen #BISH 428562 (Emmons, B. 4).

Bishop Museum (Honolulu). 1967. Voucher specimen #BISH 437999 (Emmons, B. 4).

Bishop Museum (Honolulu). 1968. Voucher specimen #BISH 28950 (Bristol, M.L. 2425).

Bishop Museum (Honolulu). 1969. Voucher specimen #BISH 698740 (Weiner, M.A. T 42).

Bishop Museum (Honolulu). 1973. Voucher specimen #BISH 417659 (Whistler, W.A. W 938).

Bishop Museum (Honolulu). 1975. Voucher specimen #BISH 430214 (Whistler, W.A. W3147).

Bishop Museum (Honolulu). 1976. Voucher specimen #BISH 429123 (Kirch, P.V. 317).

Bishop Museum (Honolulu). 1977. Voucher specimen #BISH 420140 (Krauss, N.L.H. 1548).

Bishop Museum (Honolulu). 1978. Voucher specimen #BISH 438359 (Fosberg, F.R. 58767).

Bishop Museum (Honolulu). 1978. Voucher specimen #BISH 438360 (Fosberg, F.R. 58767).

Bishop Museum (Honolulu). 1978. Voucher specimen #BISH 438364 (Fosberg, F.R. 58650).

Bishop Museum (Honolulu). 1978. Voucher specimen #BISH 438433 (Fosberg, F.R. 58286).

Bishop Museum (Honolulu). 1978. Voucher specimen #BISH 653172 (Fosberg, F.R. 58498).

Bishop Museum (Honolulu). 1979. Voucher specimen #BISH 619015 (N.Krauss 1656).

Bishop Museum (Honolulu). 1979. Voucher specimen #BISH 664374 (Buelow, G.P. 398667).

Bishop Museum (Honolulu). 1982. Voucher specimen #BISH 555117 (Florence, J. 4190).

Bishop Museum (Honolulu). 1983. Voucher specimen #BISH 492585 (Florence, J. 4918).

Bishop Museum (Honolulu). 1983. Voucher specimen #BISH 552836 (Florence, J. 6111).

Bishop Museum (Honolulu). 1983. Voucher specimen #BISH 553146 (Florence, J. 5536).

Bishop Museum (Honolulu). 1983. Voucher specimen #BISH 553672 (Florence, J. 5706).

Bishop Museum (Honolulu). 1984. Voucher specimen #BISH 493227 (Florence, J. 6387).

Bishop Museum (Honolulu). 1984. Voucher specimen #BISH 635227 (D. Herbst 7248).

Bishop Museum (Honolulu). 1984. Voucher specimen #BISH 1000085 (Herbst, D.R. 7248).

Bishop Museum (Honolulu). 1985. Voucher specimen #BISH 614966 (Morris, J. 24).

Bishop Museum (Honolulu). 1986. Voucher specimen #BISH 524023 (Krauss, N.L.H. 2030).

Bishop Museum (Honolulu). 1988. Voucher specimen #BISH 601585 (J.Florence 9775).

Bishop Museum (Honolulu). 1988. Voucher specimen #BISH 1000520 (W.L.Wagner 6242).

Bishop Museum (Honolulu). 1992. Voucher specimen #BISH 654746 (Koyama, H. 8318).

Bishop Museum (Honolulu). 1993. Voucher specimen #BISH 658473 (Florence 12022).

Bishop Museum (Honolulu). 1998. Voucher specimen #BISH 690626 (D.R.Herbst 9848).

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