Effects of chemical seed treatment on seedborne incidence of soybean bacterial pustule
1989
Sutruedee Prathuangwong (Kasetsart Univ., Bangkok (Thailand). Faculty of Agriculture. Dept. of Pathology) | Chetapan Choochoa
Ten fungicides, eight antibiotics and one adjuvant were tested on seedborne incidence of Xanthomonas campestris py. glycines causing bacterial pustule of soybean both under laboratory and field conditions. Seven chemical compounds, namely Aureomycin, Dumocycline, Agrimycin 100, Terramycin, Tersan 75, 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 bacterial pustule infected soybean cultivars SJ2, SJ4 and SJ5. 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.
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