Efficacy of chemicals on soybean bacterial pustules : yield response after application
1988
Prapan Osathapan | Niramit Kitroongruang | Somjit Kitroongruang (Maejo Inst. of Agricultural Technology, Chiang Mai (Thailand). Office of Agricultural Research and Extension)
A field experiment, using the result of laboratory testing, was conducted to evaluate the effectiveness of six bacteriocides for the control of bacterial pustule of soybean in the rainy season with SJ. 1 and SJ. 4 soybean varieties. Each of them was applied two and four times. A study of the cost-effectiveness of spraying bacteriocides showed that copper oxychloride + zineb + maneb (four applications) gave the highest returns with SJ. 1 and SJ. 4 soybean varieties. The second from copper oxychloride + zineb + maneb (four applications) were copper oxychloride + zineb + maneb (two applications) and cupric hydroxide (four applications), with SJ. 1 soybean variety and cupric hydroxide (four applications), copper oxychloride + zineb + maneb (two applications) with SJ. 4 soybean variety respectively. The returns obtained from the other four bacteriocides could not cover the cost of spraying.
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