The black velvet beetle has a common name and is a large velvet horse. Mainly adults (scarab) harm most seedlings, bite growth points or bite off young stems, severe seedlings can be eaten as a result of lack of seedlings broken bar, and even destroy the ground. This worm occurs one generation a year. It occurs when adults spend their winters in soil and pods occur. At the beginning of summer, we took food on the weeds. After the emergence of soybeans, the soybeans were eaten. This worm is lurking in the soil at night and harms it during the day. At 3 to 5 pm in the afternoon, the food is the most abundant, and there is no wind and warm weather.
Control methods: can be sprayed with 2.5% trichlorfon powder, 2 kg per 667 square meters: or with 2.5% enemy killed, 5% lefluulin, 2.5% kung fu and other agents, 15 to 20 ml per 667 square meters, against About 40 kg of water, spray.