The damage caused by fungi caused by fungi can be transmitted by seed bacteria, mainly invading the vascular bundle at the base of the stem, and the germs multiply and spread in the vascular bundle. By blocking the vascular bundle conduit and secreting toxic substances to poison the host cells, the host normally absorbs and loses. The guiding function is to hinder the transport of nutrient water, and why the blight of the bean leaves is present in the soil and fertilizer.
Symptoms of bean blight
The bean blight is a soil-borne disease. The symptoms are that the lower leaves of the diseased plant are yellow first, then gradually develop upwards. The veins turn yellow to yellowish brown on both sides, and the veins are brown. When severe, the whole leaves are degraded. The roots of the diseased plants are dysplastic, the root cortex is rotted, and the new roots are few or no, easy to pull up. The pods of the diseased plants are obviously reduced. Generally, after entering the flowering stage, the diseased plants first appear wilting, and can return to normal in the morning and evening. In the later stage, they are allered and even die.
Control measures for bean blight
(1) Rotation. For more than three years of rotation, it is best to rotate the grass crops with water and drought.
(2) Add lime to improve the soil. Applying 100 kg of lime to the soil in the acidic soil can reduce the occurrence of diseases.
(3) There are some methods for controlling pesticide roots. In the early stage of the disease, 50% carbendazim WP 1000 times solution or 10% double effect water agent 400 times solution or 75% methyl thiophanate WP 1000 times solution can be used. Each plant is filled with 50-150 grams, every 7 - Once every 10 days, 2-3 times in a row. 50% of carbendazim WP can be mixed with 200 kg of dry soil, and the ditch is applied to the sowing line, 200 kg per acre.
More pesticide knowledge , please pay attention to China Pesticide Network
Solar Powered Fan,mini solar fan,solar panel for fan and light,solar energy fan
JIANGMEN ESCLIGHTING TECHNOLOGY LIMITED , https://www.windfansummer.com