According to the recent forecast by the National Agricultural Technology Service Center for Diseases and Insects and Mutation, this year's pests and diseases in the middle and later stages of corn are generally more hazardous, with a higher degree of occurrence than usual, and insect pests are heavier than last year. From mid-August to early September, it is the earliest stage of the threat of corn earworms. The pests that threaten corn include cotton bollworm, corn borer, armyworm, peach aphid, sorghum strips, and autumn caterpillars. With the increase of planting cornices in recent years, the intercropping and intercropping area has provided multiple sources for corn earworms and the formation of concentrated damage during the ear period, which has a greater impact on the yield and quality of corn. In the year of the occurrence of corn earworms, generally one to two percent reduction in yield and affect grain quality. According to the author's investigation, the occurrence and damage of corn earworms have two major characteristics: First, due to the difference between the silking stage of corn and the planting plots, the extent of the damage is very different. Early plots of spit silk and scattered plots are much heavier than plots of late-to-late and square plots. In the same year, early and decentralized plots of corn were planted on silk plots, and the incidence rate of corn earworms was as high as 60% to 80%; The rate is generally 10% to 30%. The second is that the corn earworm is mainly composed of bollworm and corn borer, accounting for 80% to 90%, and the remaining pests only account for 10% to 20%. Grasp the characteristics of the occurrence of corn earworms and take effective preventive measures. The earliest period of prevention and control of corn earworms: The filaments of the ear begin to wilt and the corn pollination has just ended. Premature prevention and treatment during the prosperous period of the ear, will affect the pollination of the corn; if the prevention and treatment are too late, the pests have penetrated into the ear to cause harm, leading to difficulties in control and prevention and control. The period from mid-August to the end of August in China's Huang-Huai Region is the main period for flowering and pollination of most summer maize. To prevent and control corn earworms, we must seize the best period of prevention and control and implement comprehensive prevention and control: (1) Remove filaments. After the corn is finished, the scissors are used to cut off the filaments together with the 1 to 2 centimeters of the lobes of the top of the ear with scissors, and all the sheared things are brought out of the field to be treated centrally to prevent the harm of pests. (b) Pesticide control. When pests reach 25% to 30%, or 100 pests reach 40, pesticides are used immediately. Use 80% of dichlorvos EC 800 times, apply cotton thread liquid to scab, or use 2.5% deltamethrin EC 200 to 300 drops into the top of the ear of corn, dropping 6 to 10 drops of each ear (ie 8 (10ml); or with 2.5% lambda-cyhalothrin EC 1500 times, or 4.5% beta-cypermethrin EC 1500x, directed at the head and filiform spray; or with 3% phoxim granules per acre 400 ~ 500 grams, 5 to 6 kilograms of dry fine sand, sprinkled between the leaves and ears of the filaments and ears. (c) Manual capture. When the age of the pest is large, the effect of the anti-drug is poor, or the anti-drug standards cannot be met, artificial capture can be carried out. Isolation Gown,Non-Woven Isolation Gown,Disposable Isolation Gown,Medical Isolation Gown Luck Medical Consumables Co.,LIMITED , https://www.luckmedical.com