The current positive corn filling period is a critical period for the production. According to a recent survey, spider mite damage occurred in some corn fields. Since the red spider body is small and harmful to the back of the leaves, it is often not easy to be discovered. Spiders first harm the lower leaves and gradually migrate to the upper leaves. When the victim leaves chlorosis and dry, it is transferred to the upper green leaves harm. Maize turns yellow near mature leaves, resulting in dry leaves, affecting yield and quality. Therefore, according to the occurrence of spider mites, timely prevention and control measures should be taken to ensure a bumper harvest of corn.
Control methods: remove weeds on the fields, land and ditch, and reduce the source of insects. In the early stage of red spider spider mites, 1.8% of avermectin EC is applied, or 1% of 73% ECG EC is used, or 10% of dead fleas are treated with 3000 times liquid, and the back of the leaf is sprayed for prevention and control. -3 times.
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