Control methods of bean aphids

There will be a lot of insect pests in the process of bean planting, and aphids are one of the very serious insect pests, if not timely control, it is likely to affect the final yield of beans. So how to control bean aphids? Let's take a look.

1. Cause of occurrence

The main reason for the occurrence of aphids is that it is very easy to cause aphids in a long-term environment with poor ventilation, coupled with the weather or less dry water. And the fecundity of aphids is very strong, if not timely control, it will reproduce several generations in a short period of time, in the outbreak period of aphids, together on beans, will form a disaster, which can have a very great impact on beans, prevention and control is also difficult.

2. Occurrence of symptoms

When aphids occur, they are often in the tender stem buds of beans, as well as the position of the terminal bud, and the leaves are also their targets, and the tender parts of the plants are where they are concentrated. In the occurrence of aphids, the leaves of beans will be deformed and wrinkled, the growth nodes will be destroyed, resulting in slow growth or stagnation of plant growth, serious will lead to the death of the whole plant, withered branches and withered leaves are relatively light.

3. Prevention and control methods

There are not many ways to control aphids. First of all, we can choose the natural enemies of aphids to suppress them. the natural enemies promoted by aphids are ladybugs, and they are relatively safe, which will cause aphids to reproduce rapidly. at the same time, those fallen leaves should be cleaned up in time. Check whether there are any eggs on the leaves in winter, and if so, destroy the worms in time so that they cannot reproduce normally. In the spring, the branches of beans should be pruned, the branches, leaves and aborted flowers damaged by aphids should be trimmed, burned in concentration, and the larvae should be killed, which can provide excellent preventive measures. Or can spray chemical reproduction, the common agents are dimethoate, aldicarb, cypermethrin, dichlorvos, pay attention to the alternate use of agents, so as not to produce drug resistance.

The above is the introduction of bean aphid control methods, hope to help you, want to know more related knowledge, please pay attention to us.