Photos of bean diseases and control medication: bean wilt, bean rust, bean virus disease, bean disease, bean epidemic, bean coal mold.

A, bean wilt

1, symptoms: the plant's leaf edge (especially the tip of the leaf) irregular watery spots, after the leaf will gradually turn yellow and die, and slowly spread to the upper leaves, and finally lead to the death of the whole plant.

2, prevention and control methods: in the early stages of the disease with 50% carbendazim wettable powder (1,000 times liquid) or 75% metribuzin wettable powder (1,000 times liquid), 10% double-effective Ling water (400 times liquid) and other drugs for irrigation, 50-150 grams of medicine per plant, every 7-10 days irrigation 1 time, even irrigation 2-3 times can be.

Two, bean rust

1, symptoms: the back of the leaf blade yellow spots, and spots will gradually become brown and bulging (in the form of a small adenocarcinoma), after a period of time the spots gradually expand, when the skin of the summer spore pile rupture will be distributed after the reddish-brown powder.

2, prevention and control methods: 75% metribuzin wettable powder (1000 times liquid) or 50% sulfur carbon suspension (150 times liquid), 50% carbendazim wettable powder (800-1000 times liquid), 20% powder rust spirit emulsifier (800-1000 times liquid) and other drugs can be sprayed.

Three, bean virus disease

1, symptoms: the affected plants appear dwarf phenomenon (or not dwarf), while the flowering period is delayed, the severity of which will lead to a reduction in yield.

2, prevention and control methods: strengthen the management, cut off the aphid transmission channels; selection of disease-resistant varieties for planting.

four, bean disease

1, symptoms: leaf staining will appear dark green watery spots, and then will expand into a rounded light brown spots, and the surface of the white mold.

2, prevention and control methods: in the early stages of the disease with 72.2% Prilosec aqueous (800 times liquid) or 58% Leidomil manganese zinc soluble powder (500-800 times liquid), 64% kill alum wettable powder (500 times liquid) for spraying, every 7-10 days spraying, spraying 2-3 times can be.

Five, bean sooty mold

1, symptoms: both sides of the leaves appear purple-brown spots, expanding the formation of nearly round brown spots, about 1-2 cm in diameter, the environment is more humid, the surface of the spots will be densely sooty mold (the back of the leaf is more significant).

2, prevention and control methods: in the early stages of the disease with 50% carbendazim wettable powder (500 times liquid) or 75% metribuzin wettable powder (800 times liquid), 65% diclofenac zinc wettable powder (600 times liquid), 14% luo aminocopper aqueous solution (400 times liquid) and other drugs for spraying, spraying every 7-10 days, spraying 2-3 times can be.