The weevil is a Coleoptera weevil. Commonly known as weevil. It is one of the largest families in the animal kingdom, with more than 60,000 recorded species in the world, which are distributed all over the world. In front of the head, there are mouthparts that grow to the length of the trunk. There are many species of weevils in China, and more than 1000 species have been recorded.

Elephant weevils are slow-moving, slow-moving, strong in suspended animation, and a few have phototaxis. Rice elephants and water elephants are aquatic. Elephants have sexual reproduction, but some species have parthenogenesis. Weed weevil mainly harms flowers, trees and fruit trees. Larvae is very fat, bent into a "C" shape, and its head is particularly developed. It can burrow into the roots, stems and leaves of plants or feed on cereals and beans, and it is a big pest on cash crops. Crying doesn't bite or taste.

First of all, a thorough cleaning should be carried out (use a vacuum cleaner or sweeper, and the garbage should be burned after cleaning). Secondly, effective and approved pesticides should be sprayed, and eggs and larvae must be removed. Before storing grain, it is necessary to ensure that there are no weevils in it. It is only superficial to try to deal with it after storing grain, which will only lead to pests going deep into the grain pile to survive. Before storage, it is necessary to ensure that there are no insects in the grain. The warehouse is disinfected with pesticides and insect-proof thread. Commonly used pesticides include phosphorus for grain protection, phosphorus for insect control, methylpyrimidine, chlorpyrifos and deltamethrin.