Effects of Chemical Seed Treatment on Seedborne Incidence of Soybean Bacterial Pustule

Abstract

Ten fungicides, eight antibiotics and one adjuvant were tested on seedborne incidence of Xanthomoras campestris py. Glycines causing bacterial pustule of soybean both under laboratory and field conditions. Seven chemical compounds, namely Aureomycin, Dumocycline, Agrimucin100, Terramycin, Tersan75, Thane M-45 and Cupravit at 1000, 750, 500 and 250 ppm were effective against the pathogen in laboratory. In field trial, seed treatment using the 7 chemicals including fungicides at 2,000 and 1,000 ppm and antibiotics at 1,000 and 500 ppm was done on hacterial pustule infected soybean cultivars SJ2, SJ4 and SJ5. The results revealed that seeds treated with fungicides had higher germination percentage, number of plants per area and yield average than those treated with antibiotics and control. However, there were no significant differences in 100-seed weight and percentage of infected leaf area among them.