The latest control methods of bean aphids
There are many pests in the process of bean cultivation, and aphids are one of the most serious pests. If not controlled in time, it is likely to affect the final yield of beans. So how do bean aphids control it? Let's take a look.
1. Causes of occurrence
The main reason for aphid occurrence is that aphids are easily caused by long-term poor ventilation environment, coupled with weather or water shortage and drought. Moreover, aphids have very strong reproductive capacity. If they are not controlled in time, they will reproduce several generations in a short time. During the outbreak period of aphids, they will attack beans together and form disasters. The impact on beans can be very large, and it is difficult to control them.
2. Symptoms
Aphids occur in young stems, buds, and terminal buds of beans, as well as leaves, which are also targets of attack. Young parts of plants are where they concentrate. In the occurrence of aphids, the leaves of beans will be deformed and shriveled, and the growth nodes will be destroyed, resulting in slow growth or growth stagnation of the plants. In severe cases, the whole plant will die, and the withered leaves will be relatively light.
3. Prevention and control methods
There are not many ways to control aphids. First of all, you can choose the natural enemies of aphids to suppress them. The natural enemies promoted by aphids are ladybugs, which are relatively safe. This will lead to aphids not being able to reproduce quickly. At the same time, those fallen leaves should be cleaned up in time. In winter, check whether there are eggs on the leaves. If there are, destroy the insect holes in time so that they cannot reproduce normally. In the spring, the branches of beans should be pruned, the branches and leaves damaged by aphids and sterile flowers should be pruned off, and the larvae should be killed in a concentrated burning, which can play an excellent preventive measure. Or you can spray agents for reproduction. Common agents include dimethoate, anti-aphid, cypermethrin and dichlorvos. Pay attention to the alternate use of agents to avoid drug resistance.
The above is the bean aphid control method introduction, hope to help you, want to know more related knowledge, please pay attention to us.
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