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Cadophora gregata (brown stem rot of soybean )
Cadophora gregata
brown stem rot of soybean
Phialophora gregata, Cephalosporium gregatum
Ontario, Puerto Rico, Japan, Egypt, Argentina, Brazil, Croatia, Serbia, Yugoslavia, Montenegro
Midwest and Southeast states
2021-10-28
fungus
China, Korea
soybean, adzuki bean, mung bean
PHIAGR
Transmission of Cadophora gregata is primarily through plant debris and infected soil.
2 Known Hosts
Glycine max
soybean
No
PHIAGR-3, PHIAGR-5, PHIAGR-6
Pathway not proven. The first two references found this pathogen on or in seed, but there was little or no evidence of seed transmission. Additionally, research was done with seed produced under conditions favorable to disease development or with inoculated seed. No toothed references found indicating seed transmission. The NSHS (PHIAGR-6) classifies this pathogen as a "Regulated Non-seedborne Pest"
Yes
Culture plating
Culture plating is the NSHS standard method.
PHIAGR-6
Soil amendments with Trichoderma were compared with benomyl seed treatments, however, no references found on direct seed treatments.
PHIAGR-2
PHIAGR-3
Ellis MA, Paschal EH, Powell PE, Tenne FD, 1979. Internally seedborne fungi of soya bean in Puerto Rico and their effect on seed germination and field emergence. Tropical Agriculture, 56:171-174
PHIAGR-5
Abo-El-Dahab, M. 1968. Occurrence of the brown stem rot disease of Soybean in Egypt (U.A.R.). Phytopathologia Mediterranea, 7:28-33.
PHIAGR-6
Seed Health Testing Method for Phialophora gregatum. 2016. National Seed Health System. www.seedhealth.org
PHIAGR-2
Yehia AH, Abd-El-Kader DA, Salem DE, Sayed-Ahmed AA, 1994. Biological soil treatment with Trichoderma harzianum to control brown stem rot of soybean in Egypt. Egyptian Journal of Phytopathology, 22:143-157
Vigna spp.
mung bean, cowpea
No
No references found indicating seed is a pathway.
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