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United States Department of Agriculture

Agricultural Research Service

Title: Evaluation of Resistance in Soybeans to Fusarium Solani, the Causal Agent of Sudden Death Syndrome

item Hartman, Glen
item Huang, Yi-Shiou - UNIV OF ILLINOIS

Submitted to: Phytopathology
Publication Type: Abstract Only
Publication Acceptance Date: July 27, 1996
Publication Date: N/A

Technical Abstract: Isolate Monticello of Fusarium solani was increased on sterilized sorghum seeds. Inoculum was placed about 2 cm below soybean seeds at planting. Symptoms, based on foliar severity where 1 = no symptoms to 5 = severe interveinal chlorosis and necrosis, were recorded 3 weeks after planting. Plant introductions (PI567290-567.781) were inoculated with F. solani in a series of eight screens. In the final screen, 23 PIs were advanced to a replicated experiment. Three PIs had significantly (P=0.05) less symptoms than the other PIs and the resistant check. In another study, a set of 30 soybean entries ranging from susceptible to resistant to F. solani based on field reactions were inoculated in the greenhouse and in field microplots. Significant (P=0.05) differences in AUDPC values occurred between the entries tested in the greenhouse and microplots with a significant (P=0.002) positive correlation (r = 0.56) between the field and greenhouse data.

Last Modified: 4/22/2015
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