The recent lack of rain is conducive to the occurrence of corn thrips. At present, spring maize and late spring sowing and early summer sowing maize are in the seedling stage, which is the most sensitive period for the damage of corn thrips. At the same time, with the emergence of intercropping corn and sowing of summer sowing maize, corn thrips will also be interplanted and summer sowing maize. Field shifts damage. According to recent surveys conducted by my station in the field, it is common for early-seeding summer maize field turf horses. The rate of insects is 100%. In general, there are 10-30 worms per plant and up to 50. It is hoped that the majority of peasants in towns and towns will pay attention to conducting inspections.
Symptoms of Infestation: T. hirsutum is a major pest in the corn seedling stage in our country. It uses leaf sucking mouthparts to suck leaf juice. After the leaves are damaged, intermittent silvery white spots appear with small stains. When serious, it can cause the heart and leaves of corn to grow into a pod-like shape and form a “whipâ€, resulting in plants. Deformity, resulting in a serious cause of bad heart, so that the normal growth of corn is seriously affected. Failure to take timely measures will result in reduced production, or even no harvest.
Control methods: Can use 10% imidacloprid wettable powder 20 g or 40% omethoate EC 75 ml, 20% nitenpyridine 10 g, 50% pymetrozine 10 g to spray 30 kg of water for prevention and treatment.
Precautions:
1. When spraying, be sure to spray thoroughly and focus on spraying the heart.
2. Do not use organophosphate pesticides such as omethoate within 7 days after the herbicide-killing plot; use plots of organophosphorus pesticides such as omethoate to control the plots. Do not use post-emergence herbicides within 7 days to avoid phytotoxicity. .
Another note: the recent rainfall is small, individual plots of spider mite harm is heavy, hope to prevent and control.
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