The comprehensive prevention and treatment technology of bean rust
Rust is a major disease of kidney bean, which occurs widely. It mainly occurs in summer and autumn in northern China. The onset of the disease is fierce, spreading rapidly and causing serious harm. Low-lying land, poor drainage, densely planted country, poorly ventilated plots, and heavy onset. Rust mainly affects the leaves, and stem vines, petioles, and soybean pods can be severe. At the beginning of the disease, yellow-green or grayish-white spots appeared on the leaves, which then raised and turned into yellow-brown microspores. After expanding the lesions, the epidermis broke and red powder was scattered. At the late stage of the disease, a black teliospore grows near the summer spores heap. Diseased leaves can easily fall.
1, agricultural control. The selection of disease-resistant varieties, a reasonable rotation, the implementation of high ridge cultivation, rational close planting, adjusting the sowing period to avoid the relapse period. Clean up pastoral disease and concentrate deeply buried or burned.
2, pharmaceutical control. In the early stage of the disease, the lesions are prevented from spraying before the rupture, and the medicament can be selected from 10% difenoconazole water dispersible granules 500-800 times, or 50% rust rust 800-1000 times, or 50% carbendazim can be used. Wettable powder 800-1000 times, or 40% carbendazim suspension 400-500 times, or 15% triadimefon EC 1000 times, or 2% Wuycin 150-200 times, or 75 times Chlorothalonil WP 600 times, or 70% mancozeb 400 times, or 40% fluosilazole EC 800 times, spray once every 7-10 days, 2-3 times.
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