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Gardner, D. E., J. L. McMeans, C. M. Brown, R. M. Bilbrey, and L. L. Parker. 1974. Geographical localization and lint fluorescence in relation to aflatoxin production in Aspergillus flavus-infected cottonseed. Phytopathology 64:452-455.
ABSTRACT
Aspergillus flavus boll infection in specific western regions of the cotton belt results in a characteristic greenish-yellowish lint fluorescence often accompanied by aflatoxin accumulation in the seed. However, essentially no aflatoxin or fluorescence have been detected in cottonseed grown at Safford, Arizona; although most A. flavus isolates from infected seed produced aflatoxins in the laboratory. Natural A. flavus infection probably occurs in nondamaged bolls only as bolls open at maturity. At Phoenix, Arizona and Brawley, California, opening coincided with extended periods of elevated temp. At Safford, most bolls opened during periods of lower temp. A. flavus boll inoculation during the boll-opening period at each location resulted in high infection, aflatoxin, and fluorescence at Phoenix and Brawley, and also at Safford in August. However, no more than traces of aflatoxin or fluorescence resulted from inoculation-induced infection at Safford in September when the majority of bolls at that location opened. Low temp is suggested as the principal factor limiting aflatoxin at Safford. Considerable amounts of aflatoxin were detected throughout this study in seed from inoculated bolls containing no fluorescent lint; a significant exception to the usual association of fluorescence with high aflatoxin levels in cottonseed.

FULL TEXT
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HOSTS
Cotton sp. - Cotton

PATHOGENS
Aspergillus flavus - Aspergillus

RELEVANT TO BIOCONTROL
No.

KEY WORDS
Aflatoxin, cotton, Cotton, Aspergillus flavus.

IMAGES
01_079 -- upper row steamed, lower row non-steamed soil; CO2 =.03%, O2 = 5-21%; CO2 = 7-15%, O2 = 21%; CO2 =7%, O2 = 10% 01_079 - upper row steamed, lower row non-steamed soil; CO2 =.03%, O2 = 5-21%; CO2 = 7-15%, O2 = 21%; CO2 =7%, O2 = 10%
PATHOGEN: Aspergillus melleus
01_081 -- vf7/1246 grafted greeen stem (vf7 portion) abnormal phloem 01_081 - vf7/1246 grafted greeen stem (vf7 portion) abnormal phloem
PATHOGEN: Aspergillus melleus
01_082 -- vf7/1246 grafted green stem (vf7 portion) abnormal phloem c 01_082 - vf7/1246 grafted green stem (vf7 portion) abnormal phloem c
PATHOGEN: Aspergillus melleus
01_083 -- phloem of healthy vf7 01_083 - phloem of healthy vf7
PATHOGEN: Aspergillus melleus
01_084 -- phloem of healthy vf7 01_084 - phloem of healthy vf7
PATHOGEN: Aspergillus melleus
01_085 -- 3 diseased LB plants; LB/ dentatum grafts (diseased), plants all same age 01_085 - 3 diseased LB plants; LB/ dentatum grafts (diseased), plants all same age
PATHOGEN: Aspergillus melleus
01_086 -- 2 diseased LB plants; two diseased LB/dentatum grafts 01_086 - 2 diseased LB plants; two diseased LB/dentatum grafts
PATHOGEN: Aspergillus melleus
01_087 -- both plants same age; LB with curly top, healthy, control, no grafts 01_087 - both plants same age; LB with curly top, healthy, control, no grafts
PATHOGEN: Aspergillus melleus
01_088 -- 1 month after inoculation, same age plants, LB and LB/dentatum graft 01_088 - 1 month after inoculation, same age plants, LB and LB/dentatum graft
PATHOGEN: Aspergillus melleus
01_089 -- 1 month after inoculation, same age plants, LB and LB/dentatum graft 01_089 - 1 month after inoculation, same age plants, LB and LB/dentatum graft
PATHOGEN: Aspergillus melleus
01_090 -- 1 month after inoculation, 2 LB, 2 LB/dentatum grafts, healthy LB 01_090 - 1 month after inoculation, 2 LB, 2 LB/dentatum grafts, healthy LB
PATHOGEN: Aspergillus melleus

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