What to Do When Aphids Appear on Yardlong Beans? A Detailed Guide to the Latest Control Methods

Many pests occur during the cultivation of yardlong beans, and aphids are one of the most serious of them. If they are not controlled in time, they can very likely affect the final yield of yardlong beans. So how should yardlong bean aphids be controlled? Let's take a look.

1. Causes of occurrence

The main reason aphids occur is that over a long period in a poorly ventilated environment, together with weather conditions or low water and drought, aphids are extremely likely to occur. In addition, aphids have extremely strong reproductive capacity. If they are not controlled in time, they can reproduce for several generations in a short period. During an aphid outbreak, they all attack the yardlong beans together and can cause a disaster. This has a very large impact on yardlong beans, and control is also relatively difficult.

2. Symptoms of occurrence

When aphids occur, they are often found on the tender stems, flower buds and terminal buds of yardlong beans, and the leaves are also targets they attack. The tender parts of the plant are where they gather. When aphids occur, they cause the leaves of yardlong beans to become deformed and shrunken, and the growing points are damaged, causing the plant to grow slowly or stop growing. In severe cases, the entire plant dies; withered branches and wilted leaves are still relatively mild.

3. Control methods

There are not many methods for controlling aphids. First, you can choose the natural enemies of aphids to suppress them. The natural enemy that aphids promote is the ladybug, and this is relatively safer. This will prevent aphids from reproducing rapidly. At the same time, the fallen leaves must be cleaned up in time. In winter, check whether there are things such as insect eggs on the leaves. If there are, destroy the insect nests in time so that they cannot reproduce normally. In spring, prune the branches of yardlong beans. The branches and leaves damaged by aphids and the abortive flowers must all be pruned off, then burned together in a concentrated way to kill the larvae, which can provide excellent preventive measures. Or you can spray pesticides for reproduction. Common pesticides include dimethoate, pirimicarb, cypermethrin and dichlorvos. Note that the pesticides should be used alternately to avoid developing resistance.

The above is an introduction to methods for controlling aphids on yardlong beans. I hope it can help you. To learn more related knowledge, please stay tuned to us.