Causes and control methods of dried bean leaves

Bean is a common market in our life, there are many problems in the process of planting, dried bean leaves are a kind of headache, when planting, bean leaves suddenly dry, which seriously affects the growth of beans, but also has a certain impact on yield and quality. So what is the cause of beans? How to prevent and cure it? Let's take a look.

First, the cause of dried leaves

Dried bean leaves are mostly caused by herbicides, at first, the old leaves dry up, and the stems are still green. With the growth of beans, the new leaves appear abnormal, and the leaves are wrinkled and uneven. If the beans are in the podding stage, there will be flower drop phenomenon, poor plant growth, seriously affecting the yield. Some other diseases and insect pests can also cause dried bean leaves, the common harm of leaf rollers, but also dry leaves and rolled leaves.

II. Prevention and control methods

1. Clean water scouring

The spraying time of herbicides is generally 7-10 days. During this period, the stems and leaves of beans should be often sprayed with water to reduce the residual dose of herbicides on beans and reduce the phenomenon of dry leaves.

2. Topdressing in time

When the phenomenon of dry leaves occurs, ammonium bicarbonate or urea-based fertilizers can be boiled in time, and appropriate phosphorus and potassium fertilizers can also be properly combined to promote plant recovery. The amount of topdressing should be carried out according to the severity of drug damage and the growth of beans.

3. Watering in time

Watering in time after topdressing can promote the volatilization of fertilizer effect as soon as possible, reduce the concentration of harmful substances in beans, and alleviate symptoms, and plant growth regulators and foliar fertilizer can also be sprayed on the leaf. The effect of mixed spraying with 7500 times solution of brassine and foliar fertilizer is better. According to the degree of drug damage, it was sprayed every 10-15 days for 1-3 times.

4. Pest control

In the early stage of the occurrence of pests, check and pick the leaves on the bean plants, take them out of the field for centralized treatment or casually pinch and kill the larvae in the leaves, or spray pyrethroid EC, cypermethrin EC, fenpropathrin and other medicament control, pay attention to the alternate spraying of insecticides, so as to prevent pests from producing drug resistance.

The above is the introduction of the causes and control methods of dried bean leaves. I hope I can help you. If you want to know more about it, please follow us.