Prevention and treatment of grape leafhoppers

The current high-temperature weather, coupled with lush foliage and poor ventilation, will contribute to the serious occurrence of grape leafhoppers and damage the production of grapes. Attention should be paid to prevention and control. Grape leafhoppers mainly damage grape leaves. Adults and nymphs are damaged on the back of leaves, and gray spots appear on the front of damaged leaves. When the density of wormholes is large, the leaves of the entire leaf become gray. Affect photosynthesis and shoot development, reduce fruit quality.

A second generation of adults emerged in August. A third-generation adult was born from September to October. High-temperature, poorly ventilated vineyards with dense foliage and garden shelving are serious.

Grape yellow leafhoppers and grape leafhoppers can be harmful during the whole growth period. Adults and nymphs cluster on the back of leaves to suck juice and harm the leaves. Two kinds of leafhoppers are harmful to the closed areas of the plant. Therefore, they first spread from the middle and lower leaves of the dendrite to the upper part and the periphery. After the leaves are damaged, there are dense white spots on the front. When the damage is serious, the small white spots become big plaques, which seriously affect the photosynthesis of the leaves and the accumulation of organic matter, causing the early fall of the leaves, the decline of the tree vigor, and the impact on the year Two years fruit quality and yield.

Control methods:

1. Remove fallen leaves and weeds to eliminate overwintering adults.

2. Strengthen field management during growth period and improve ventilation and light transmission conditions.

3, master the application of nymphs in the budding period. In the occurrence period, the agent can be sprayed with 20% fenvalerate EC 1500 times, or 10% cypermethrin EC 3000 times, or 80% DDVP 1500, or 50% Dimethoate 1500 times.

Industrial Laser Distance Sensor

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