1. Symptoms of the onset of disease Lesions lesions are nearly circular to irregular, sometimes limited by the veins extending along the veins, and are 2 to 9 mm in size, red or reddish brown, with a gray moldy layer on the back. Severe infection of soybean meal, the formation of a larger reddish-brown spot, the lesion center dark brown, dense dark gray mold layer later, affect the consumption.
2. Control methods
1 Agricultural measures The disease-free strain was selected for seeding and soaked in warm water at 45°C for 10 minutes before sowing. Post-harvest deep plowing after harvest, conditional rotation.
2 In the early stage of the disease prevention and control, spray 75% chlorothalonil wettable powder 600 times, or 50% sulfur suspension 500 times, or 14% colubrum 300 times, or 72% WP wettable powder. 600-800 times the liquid, or 72% Ke Kang WP 600 times, or 50% WP 1500 times, or 58% MN WP 500 times, or 72.2% Proploycin hydrotrope 600 times, or 52.5% fast-acting (famoxanone-frozen urea cyanide) water dispersible granules 1500 times, or 1:1:200 Bordeaux mixture, once every 7 days, continuous control 2 to 3 times.
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