Adult spider mites live lurking in the rhizosphere soil overwintering. After the temperature rose in early spring, it was unearthed. Eradication of overwintering adults can be achieved by early spring and autumn irrigation, which can eliminate a large number of overwintering spider mites. The weather is dry, pay attention to irrigation, increase the humidity in the field, it is not conducive to its development and reproduction. After the early spring spider mites were unearthed, they were concentrated on some weeds for feeding and breeding. After the emergence of spring corn, they were transferred to nearby corn seedlings for harm. It takes a long time to show a piece of hazard in the field and spread throughout the field. The number of droughts decreased, and the number dropped after heavy rainfall.
Control methods:
1. The use of sprays of pesticides around the plot to establish a blockade zone will prevent corn spider mites from expanding inwards from the ground. Cutting off the source of red spiders is an effective way to reduce damage.
2. Remove the leaves from the lower part of the corn and bring it to the field for burning.
3. Use a smoke generator to smoke and recommend the agent: avermectin emulsifiable concentrate or avigochlor emulsifiable concentrate is mixed with diesel 1:3.
4. Chemical control can be used 40% dimethoate and 20% dicofol alcohol mixture (1:1) 1000 ~ 1500 times or 20% chlorsulfuron EC 2000 times; 20% gram EC 2000 times and so on.
Control methods:
1. The use of sprays of pesticides around the plot to establish a blockade zone will prevent corn spider mites from expanding inwards from the ground. Cutting off the source of red spiders is an effective way to reduce damage.
2. Remove the leaves from the lower part of the corn and bring it to the field for burning.
3. Use a smoke generator to smoke and recommend the agent: avermectin emulsifiable concentrate or avigochlor emulsifiable concentrate is mixed with diesel 1:3.
4. Chemical control can be used 40% dimethoate and 20% dicofol alcohol mixture (1:1) 1000 ~ 1500 times or 20% chlorsulfuron EC 2000 times; 20% gram EC 2000 times and so on.
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