The bean has got root rot.

June 18, 2019

The bean root rot primarily harms the roots and base of the plant and invades the wound. High temperature, heavy rain, high water content in the field, and high humidity. At the beginning of the disease, water-stained reddish-brown spots appeared in the diseased area, and later became dark brown or dark brown, slightly sunken or cracked; the main root was rot or necrotic, the lateral roots were few, and the plants were dwarfed and easily pulled out. In severe conditions, the main roots are completely rotted and stems and leaves are dead. When wet, pink molds appear on the stem base.
Control measures Seed bed treatment Fields not grown with kidney beans are grown on Daejeon soil. Use 50% carbendazim WP, 50% benomyl wettable powder or 70% dexcone wettable powder 8g per square meter nursery.
Cultivation and management of cruciferous, Liliaceae crop rotation 3-5 years, sorghum or semi-high sorghum cultivation; hoe ditch cultivation, loose soil weeding; timely drainage after rain, can not flood irrigation; application of organic fertilizer, increase phosphorus and potassium fertilizers; Timely removal of diseased plants and out of the field buried deep or burned, diseased areas and disinfected with lime around.
When the chemical is used to control the disease, spray 70% thiophanate-methyl wettable powder 1000 times or 75% chlorothalonil wettable powder 600 times on the stem base, spray once every 7-10 days, and spray 2-3 times in total. Or choose 12.5% ​​of Weiwei Lingzhi 200-300 times liquid, 60% anti-mildew Po WP 500-600 times, 50% carbendazim wettable powder 500 times, 70% Dukesson WP 800-1000 times liquid, root rot 300 times and other irrigation roots, irrigation 10 days later.

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