The high temperature in autumn, the strong sunlight, and the dry climate are the most prosperous periods in which horse fleas occur. The autumn grape fruit suffers the most serious damage. After the young fleas are bitten by fleas, a black spot of black needles is formed on the fruit surface. Fruit enlargement and fruit appearance, reduce fruit quality. Therefore, during the young fruit period of autumn grape, it is necessary to pay attention to the prevention and control of the thrips in order to protect the young fruit of the grapes.
Specific prevention and control methods: When the young fruit of the autumn fruit of the grapevine has just been excised, it is necessary to spray a 1000-fold 0.5% solution of veratridine or a 1000-fold 0.5% solution of phenoxy-water in the foliage. After 7 to 10 days, another 2 to 3 consecutive applications of 1500-fold 25% pymetrozine aqueous solution, 1500-fold 20% aqueous thiamethoxam solution, or 1500-fold aqueous 5% acetamiprid solution, or 1000-fold 10% aqueous imidacloprid solution are performed. Or 1000 times 10% aqueous solution of nitenpyram, spray once every 7-10 days, evenly spray all the leaves and young fruit, in order to start dropping drops of water is appropriate.
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