Some vegetable farmers mistakenly believe that the Hummer should only occur in the hot season. Therefore, the damage level of the greenhouse Hummer in the cold season is underestimated and insufficiently valued. The higher temperature in the greenhouse, coupled with the high temperature management of cucumbers on weekdays, has created a good living environment for Hummer. Therefore, winter greenhouses should pay attention to the prevention and control of thrips in order to avoid causing major losses.
When cucumbers are damaged by thrips, the growth point is torn down, the leaves curl, chlorosis, and yellow spots. Sometimes black thrips adults can be found in the stamens of cucumbers. After the melons were damaged, the melon strips were stained by bugs, and some cucumbers showed symptoms such as thin waist, big head, peel rust and other symptoms. The following methods can be taken to prevent and control:
1. Physical control: Hang the blue plate to seduce the adult, hang a blue plate about every 10 meters, slightly higher than the cucumber growth point 15-30 centimeters, to reduce adult oviposition hazard.
2. Chemical control: Select agents that are effective for sucking mouthparts, such as 25% imidacloprid WP 2000 times, or 5% acetamiprid WP 2500X, or 2.5% dish suspension 1000 -1500 times liquid, or 25% Aktai water dispersible granules 5000-6000 times liquid, spray evenly, once in 5-7 days, alternating 2-3 times.
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