How to remove begonia covered with aphids? Why do they plant aphids?

First, how to eliminate aphids crawling with begonia?

If there are aphids in begonia longipedunculata, it will harm flower buds and new leaves. After a long time, sooty blotch will be induced, which will cause the leaves to curl backwards and seriously harm the growth. So once aphids are found, they should be treated as soon as possible. It can be controlled by spraying chemicals on plants, and it can be effective after three or four consecutive sprays. In addition, we should pay attention to prevention. Remove weeds and fallen leaves near begonia to avoid infection. Note that aphids don't like wet environment, but frequent watering will create an environment that is not conducive to their growth, but be careful not to destroy the growth of plants.

Second, why does Haitang grow aphids?

Aphids of begonia stickleback are usually caused by abnormal weather. If the temperature is too high, the precipitation is too low and the humidity is too low, aphids are easily infected in such an environment. The optimum temperature of aphids is 14-26 degrees, and the humidity is 50%-80%. If you want aphid harm, you should pay attention to the weather change and try to provide an environment that is not conducive to aphid growth.

Third, other pests easily infected by begonia sessilifolia.

In addition to aphids, Eupatorium adenophorum is also easy to infect, especially in the autumn flowering and fruiting period, which will endanger the growth of flowers and fruits. Be sure to treat it as soon as possible after discovery. In addition, there are gypsy moths, which eat leaves and endanger plant growth. If there are many pests, spray pesticides.