Method of assessment of red leaf blotch on soybeans used to evaluate cultivar susceptibility and chemical control.

Reference Report for IND93052924

Title:	Method of assessment of red leaf blotch on soybeans used to evaluate cultivar susceptibility and chemical control.
Authors:	Levy, C., Mahuku, G.S., Tattersfield, J.R., Cole, D.L.
Source:	Crop Prot. 1990, 9(2):148-154
Abstract:	A field method to assess the infection of soybeans (Glycine max) by Pyrenochaeta glycines, the cause of red leaf blotch (RLB), was developed and successfully used in three field experiments. The assessment method relates infection in the upper canopy leaves to a 0-6 logit scale. Three sprays of the fungicide, fentin acetate (triphenyltin acetate) at 0.6 kg ha-1 applied to plants of four selected soybean cultivars during reproductive growth restricted symptoms, thereby prolonging physiological development and increasing seed yield. Cultivars differed in their susceptibility to P. glycines and yields were larger in the less susceptible cultivars

Funded by the USDA-ARS. Developed by the USDA-ARS SoyBase and Legume Clade Database group at the Iowa State University, Ames, IA

U.S. Public Domain