The phenomenon of corn seedling shortage and ridge cutting is serious. How to deal with it?

Agricultural pest control is not difficult, but the difficulty lies in the lack of effective control methods. In view of the serious problem of corn seedling shortage and ridge cutting, the countermeasures are as follows.

One is to choose the right pesticide. Farmers can choose insecticides with a higher level of comprehensive control based on the local pest resistance, such as the currently popular Chlorfenapyr + lufenuron, Emamectin Benzoate + indoxacarb, abamectin + chlorantraniliprole Formamide and other formulas, while adding thiamethoxam or acetamiprid to control sucking pests. At this time, because the current corn seedlings are small, it is not recommended to add fungicides and foliar fertilizers.

The second is to choose the right pesticide application method. When choosing spraying to control corn pests, you must apply large amounts of water. That is, on the premise that the amount of pesticide per mu remains unchanged, try to use more than 60 pounds of water per mu. Applying pesticides with large amounts of water can make the chemical solution fully Contact the ground, thereby rendering the straw “bunker” useless. In addition, using chlorpyrifos + beta-cypermethrin to make toxic soil and spreading it is also a more direct method of prevention and control.

For example, use 500 grams of chlorpyrifos40% EC + 500 grams of Lambda-cyhalothrin4.5% EC per acre, mix 5 kg of water with sand or about 50 kg of organic fertilizer, and then spread it evenly. After spreading, you can use agricultural tools to turn the straw. The medicated particles touch the ground.

The third is to choose the right time. Applying pesticides at high temperatures during the seedling stage of corn can easily lead to phytotoxicity, and in high-light environments, the activity of pests is reduced and the contact killing effect cannot be achieved. In the evening, when the pests begin to be active and cause damage, applying pesticides at this time can ensure effective contact between the liquid and the pests, and maximize the contact, stomach poisoning or fumigation effects of the pesticides.