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When is the best control effect of corn borer?

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, When is the best control effect of corn borer? Please give guidance that corn is vulnerable to pests from emergence to maturity. In order to obtain high quality and high yield of corn, it is very important to control pests reasonably. In particular, the harm to corn borer should not be taken lightly. Corn borer, also known as drillworm, is more common on corn.

When is the best control effect of corn borer? Please give guidance that corn is vulnerable to pests from emergence to maturity. In order to obtain high quality and high yield of corn, it is very important to control pests reasonably. In particular, the harm to corn borer should not be taken lightly. Corn borer (Ostrinia furnacalis), also known as drill worm, is a common and serious pest on corn. The first instar larvae drill into the heart leaves, leaving many horizontal holes after the leaves are unfolded; the older larvae can bite the filaments, stems and the base of the male ear into the ear axis and bite the corn grain at any time. The control of corn borer can be controlled by referring to the following two periods: 1. Prevention and treatment of heart and leaf stage at this time, the insect is sensitive to drugs, which is the best time for control effect. 3% carbofuran granules or 1% 1605 emulsion granules (0.5 kg of 50 ethyl 1605 EC, diluted with 10 kg of water and then diluted with 25 kg cinder or fine sand) can be used for heart leaf control; about 1 g per plant, 2 kg per mu; according to previous years' experience, heart leaves were perfused with 1000 times diluted with methamidophos and cypermethrin in the ratio of 5: 9 ∶ 1. two。 Control at ear stage at this time, the corn was shredding, and the older larvae of the corn toad ate the filaments and stems on the plant. 50% dichlorvos 500-fold solution or 90% trichlorfon 800-fold solution can be used to spray filaments and ears, or a paste can be prepared to smear the filaments after pollination, or 2% of the top of the ear can be cut off to control corn borer. Click to get more Pesticide Application techniques click to get more Pesticide Application techniques Click to get more Maize planting techniques

 
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