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(1) Selection of disease-resistant varieties.
(2) Reasonable rotation for agricultural control Avoid heavy cropping, remove field soybean residues, remove field weeds in time, achieve ventilation and light transmission, reduce the humidity in the field, and turn them deeper after harvest.
(3) Seed treatment: The use of fungicides, such as 50% carbendazim WP and 50% Ketodac WP, can be used to effectively reduce the risk of gray spot disease. The amount is generally 0.3. %~0.4%.
(4) Chemical control: 70% thiophanate-methyl, 36% carbendazim suspension 500 times or 40% chlorothalonil suspension 600 times, 50% thiophanate-methyl WP wet 600 to 700 times , 50% Benomyl WP 1500 times, 65% Tamyroxin WP 100 times, 50% Polymyxin WP 800 times, control 1 to 7 days, control of the whole growth period 2 times.
How to prevent soybean gray spot disease?
According to the characteristics of soybean grey spot, prevention and control of soybean gray spot disease can be considered from the following aspects:
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