Give birth to a generation every year The female wing sheath of the adult is all yellow and smaller; The male wing sheath is basically black and there is a big black spot near the back of the sheath wing, which is larger. There are far more females than males. Young insects eat bamboo shoots, and adults also eat bamboo shoots, which is very harmful. Prevention and control methods: In autumn and winter, the bamboo forest can be loosened, and the bamboo elephant cocoon can be directly smashed, which is not conducive to the bamboo elephant overwintering. During the spawning period, adults can spray Baichongdi, dig out new bamboo shoots and kill pupae in the soil. Edible. Children in Guangxi, Sichuan and Chongqing like to catch this insect.
Life habits:
Bamboo, like a generation, overwinters in the soil as an adult. From June to July of the following year, after the new bamboo shoots grow stronger, the adults are unearthed to feed, mate and lay eggs on the bamboo shoots. Eggs are mostly laid in the shoot tips. Before spawning, adults bite holes in the shoot tips and lay eggs in them. Each hole lays 1-2 eggs, and the holes are wet or have fibrous protrusions. The eggs hatch in 3-7 days. Larval stage 15- 19 days.
Mature larvae bite holes at the injured site and land, then drill into the soil to build a soil chamber at a depth of 8- 10 cm to pupate, and adults overwinter in the soil after emergence. The time from egg to adult is 1 month. May 5- 10/0 every year can be harmful, especially in July-August. After the adults are unearthed, they usually fly at 8- 10, and the adults have suspended animation.
The adult bamboo weevil and the small bamboo weevil were unearthed in May and June, and they moved during the day, supplemented with bamboo shoots, pecked the bamboo shoots into many small holes, pecked the spawning holes downward with their heads, and then laid eggs; The eggs hatch in 3-5 days, and the larvae eat in the bamboo shoots. After about 20 days, the larvae bite through the shell of the bamboo shoots and go into the ground to pupate in about 15 days, and the pupal stage is 15 days, and the emerged adults overwinter in the soil cocoon.