The midge is a devastating pest in wheat production. It mainly occurs in the main winter wheat production area in the Huanghuai basin, which is 31 to 35 degrees north latitude. Hosts are wheat, barley, barley, etc., are larvae sucking wheat grain slurry to form pods, causing serious harvest. First, the symptoms of damage The wheat midge is attacked by larvae as flower worms, seeds, or wheat grains. The larvae lurk in the glume and absorb the sap of the granules that are being grouted, causing pods and empty shells. Second, living habits When the heading of wheat began in the following year, the wheat red-sucking midge began feathering and unearthing. Adults throughout the region emerged and emerged, and the eclosion stage was consistent with the wheat heading stage. The insect is photophobia and has dormant habits for many years. Some dormant periods last up to 12 years. Third, control methods 1. Agricultural control 1 selection of insect-resistant varieties. Planting according to local conditions can greatly reduce the harm of midge. 2 Cultivation measures. Adjust the layout of the crops, implement crop rotation, avoid continuous cropping of wheat, and plough wheat in time. 2. Biological control 1 There are many types of natural enemies in wheat. For example, the parasitic insects of red midge insect larvae have bees and bees, and the parasitism rate is high under natural conditions. Attention must be paid to adequate protection. 2 Predators are mainly ants (predation larvae), spiders, bandits (prey adults), and six-point humming horses (prey eggs). 3. Chemical prevention and control strategies: The main attack period, adult eradication. Prevention index: 300,000 acres in production as a reference index. The appropriate period of control: The best control effect is achieved in the period of phlegm flooding and adult emergence. Appropriate medicines and methods of application: In the period of flood season, mainly Isaac Toxic Soil should be used, and 50% phoxim or 40% methylisotriphosin EC should be used to make poisonous soil. After 4 pm, wheat fields were evenly distributed. Adult stage control: In addition to disinfecting soil, dusting and spraying can also be used. Heading and flowering period, combined with the control of wheat aphid spraying to control adults, dimethoate, phoxim, deltamethrin, and cypermethrin can be used to spray water.
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