1、 What did the bean worm become

Bean worm is the larva of soybean moth. When it grows up, it will become soybean moth. Bean moth belongs to Lepidoptera moth family, which can reproduce one generation a year. The larval stage is yellow green, with a body length of about 90mm. It is mainly distributed in the Yangtze River Basin, Huang Huai River Basin and South China. Parasitic on soybean, mung bean, Robinia pseudoacacia, Robinia pseudoacacia and grapevine leaves will also endanger the growth of these plants

2、 Pupae in a few days

Most mature larvae overwinter in the upper layer of 9-12 cm soil, and will move to the upper layer of the surface and begin to pupate in the next spring. The specific time is in the middle of June every year. The peak period of eclosion is from early July. After eclosion into adults, you can fly for about half an hour. The activities of adults during the day are very hidden. Most of them start in the evening. They have strong flying ability, like to eat nectar and have phototaxis

3、 How to prevent and control

Before planting crops, dig the soil deeply to eliminate the insect source. It is best to change the farming method of soybean, which can be planted by interplanting and interplanting rape. When the larvae reach the 4th instar stage, they can be caught manually. Adults have phototaxis and can be lured and killed by black light lamp. If the pest phenomenon is serious, it is recommended to spray drugs