Corn borer, also known as corn borer, is one of the main pests of corn. In recent years, the occurrence and harm of corn borer has been increasing year by year. At present, summer corn will enter the big bell-mouth period, which is a critical period for prevention and control. 2. Heart and leaf period liquid control. In the 2-3 larval stage of larvae, 80-100 ml of 25% cyanopentane-phoxim EC, or 70-90 ml of 48% chlorpyrifos EC, or 100 ml of 4.5% beta-cypermethrin EC, or 20% chlorantraniliprole can be used. Suspending agent 10 ml, water 40-50 kg perfusion, 10 ml per plant. Buckwheat Flours,Roasted Buckwheat Powder,Tartary Buckwheat Flour,Roasted Buckwheat Huantai Biotechnology Co., Ltd. , https://www.huantaifds.com
First, the hazard characteristics of corn borer is a borer pests, larvae stems and sheaths between the stems into the stem, feeding pith, affecting nutrient transport, seedlings are not full of damaged grains, or even no grains. Larvae can be drilled into the male inflorescence to feed, often causing the male inflorescence to break off at the base, feeding on the filaments of the female ear and tender pods, but also invading the cob or eating young seeds. The stem stalks are easily broken by strong winds, resulting in serious reduction of production.
Second, the prevention and treatment method of corn leaf stage that is the big bell mouth period, is the critical period for the prevention of ear corn borer.
1. Heart leaf granules control. 3% phoxim granules can be used, 0.3-0.4 kilograms per acre to prevent the loss of heart; can also be used 50% phionol EC 0.5 kg, mixed with 40 kg of fine sand or fine furnace ash, 3-3.5 kg per acre; or BT emulsion 200 ml per acre, add a small amount of water, mix 5-7.5 kg of fine sand, sprinkle in corn leaves.