Han Yuan red peppercorns Sichuan Liuhang Agriculture Co.Ltd , https://www.lhagriculture.com
Method of diagnosis of vegetable pests
The diagnosis method of vegetable pests can be identified by the morphological characteristics of pests at various times or diagnosed by residues of insect pests. Residues of pests such as egg shells, clam shells, peeling, worms and dead body corpses, as well as the excrement of pests such as feces, honey, dew, mesh, foam-like substances. First, the leaves are eaten, forming a nick. It is eaten by Lepidoptera larvae and Coleoptera pests that are chewing mouthparts. Second, the leaves on the wire-like stripes or gray, gray and yellow spots. This symptom is mostly caused by sucking mouthparts pests such as leafflies or stinkbugs. Third, the vegetable seedlings were snapped or cut off. It is mostly fleas or leaf moths. Fourth, secrete honey exposed coal disease. These pests cause black spots on the surface of vegetables by producing honey-like excrement, and are often dominated by sucking liquid-feeding pests, such as various aphids. Fifth, the heart is narrowed and thickened. There are many such symptoms on bell peppers and peppers, which are related to ticks. Six, vegetables are harmed. The pests generally enter the body of vegetables and it is difficult to see them from the outside. If fresh insect pests are found on or around the vegetable strains and there are fresh insects on the vegetable strains, it can be judged that the pests are far removed from the vegetables, and sometimes there are Faeces and worms, but the faeces and worms have dried up, indicating that the pest has been transferred to other places. Most of these pests are moth pests and larvae. Seventh, the upper part of the seedlings withered and died. This indicates that the roots of the vegetables have been damaged. This is mostly caused by underground pests such as cockroaches, root clams and root nematodes. Eight, the massive fruit is foraged and rotted. For example, potatoes, onions, garlic and other underground roots are rotted or foraged during their growth and storage. Most of these are mostly larvae and root lice. According to these characteristics to determine pests and take appropriate control measures, we must first rule out the impact of other factors, such as fertilizer or excessive water caused by the upper wilting of vegetable seedlings die.