When is the best control effect of corn borer?
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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With what medicine do rice borer larvae fight?
With what medicine do rice borer larvae fight? Please introduce that rice borer larvae can be controlled with 5% fipronil suspension 30 to 40 milliliters and 20% triazophos EC up to 2116 per mu. When using chemical control, the field should keep a water layer 3 to 5 cm deep and let it dry naturally. Click for more disinfestation.
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How to control corn borer?
How to control corn borer? Please introduce the methods of corn borer control with reference to the following methods: corn borer control at heart and leaf stage: fields with a mosaic rate of 10% are treated comprehensively at the end of heart and leaf; if the mosaic rate is less than 10%, they can be treated as appropriate; the mosaic rate is more than 20% or 100 egg blocks are more than 30.
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