Hawaiian Ecosystems at Risk project (HEAR) Eurytoma psidii as a biocontrol agent
for Psidium cattleianum in Hawaii

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Information and references regarding Eurytoma psidii as a biocontrol agent for Psidium cattleianum in Hawaii are provided here. For further information, contact webmaster@hear.org.

Status of Eurytoma psidii as a biocontrol agent for Psidium cattleianum in Hawaii

Eurytoma psidii (Hymenoptera, Eurytomidae) from Brazil has been studied as a potential biocontrol for strawberry guava (Psidium cattleianum) in Hawaii. The insect deposits eggs in strawberry guava's flower buds and its larvae form galls within the seeds as fruit develop, resulting in fruits with a lumpy, blotched appearance. Seeds within the galled fruit do not germinate. The insect will attack strawberry guava throughout its ecological range, but only 10-50% of the fruit are attacked. Raising the insect in quarantine then coordinating its release with guava flowering would be problematic. (info from http://www.hear.org/bibliography/references/9453_smith_2002/; http://www.fs.fed.us/psw/topics/ecosystem_processes/tropical/invasive/Petition%20for%20release%20of%20Tectococcus%20may05.pdf accessed 20091124; info as of 2002 & 2005)

References for Eurytoma psidii as a biocontrol agent for Psidium cattleianum in Hawaii

Petition for field release of Tectococcus ovatus (Homoptera: Eriococcidae) for classical biological control of strawberry guava, Psidium cattleianum Sabine (Myrtaceae), in Hawaii (10 May 2005)
"Tectococcus ovatus is proposed for release into the environment for biological control of P[sidium] cattleianum in the state of Hawaii. This highly specific insect produces leaf galls on P. cattleianum in its native range in Brazil. It is expected to reduce growth and reproduction of P. cattleianum, thereby limiting spread of the weed and production of fruits available to pest fruit flies...." (http://www.fs.fed.us/psw/topics/ecosystem_processes/tropical/invasive/Petition%20for%20release%20of%20Tectococcus%20may05.pdf)

Strawberry guava (Psidium cattleianum): prospects for biological control
Smith, Clifford W. and Charles Wikler. 2002. Strawberry guava (Psidium cattleianum): prospects for biological control. pp. 108-116 in Smith, Clifford W., Julie Denslow, and Stephen Hight (eds). 2002. Proceedings of workshop on biological control of native ecosystems in Hawaii. Pacific Cooperative Studies Unit (University of Hawaii at Manoa, Department of Botany) Technical Report 129. 122 pages. from http://www.botany.hawaii.edu/faculty/duffy/techr/129.pdf accessed 16 March 2008. (http://www.hear.org/bibliography/references/9453_smith_2002/)

The Hawaiian Ecosystems at Risk (HEAR) project is currently funded by the Pacific Basin Information Node (PBIN) of the National Biological Information Infrastructure (NBII) through PIERC (USGS) with support from HCSU (UH Hilo). More details are available online. Pacific Basin Information Node (PBIN)National Biological Information Infrastructure (NBII)

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