In our technical guidance to the countryside, we found that many farmers practice fighting locusts by hitting locusts rather than by prevention and control targets, resulting in excessive use of drugs and increased costs. It is very unreasonable to have 7 or more and more than 10 times. Based on our many years of experience, we believe that farmers should be fully aware of the importance of "scientific treatment of cotton aphid should be carried out according to prevention and control indicators." There are four main advantages to doing this: First, play the role of natural enemies and reduce medication. In accordance with the prevention and control of the indicators, the number of spraying in the cotton fields was reduced, and the number of natural enemy enemies killed by the locusts was reduced, which provided the necessary conditions for the elimination of natural enemies. A locust can bred 70 larvae a day; a seven-spot ladybug can eat 200 to 300 locusts a day, and a sedge barley can eat 10 to 13 locusts a day. Especially after the cotton enters budding stage, the role of natural enemies becomes more obvious. With the continuous increase of wheat area in the past two years, in the normal years, the natural enemies of the locusts have been transferred to the cotton seedlings after being cooked. At this time, the cotton pods can generally be controlled without having to fight drugs or reduce the use of drugs. Second, increase farmers' income. According to the prevention and control index, in addition to the treatment of cotton aphid, it is to “put abacus to plant the land†to reduce the number of prevention and control, save labor, save labor, reduce investment, and reduce costs, thereby increasing the income of farmers. Third, delay the prevention and treatment time. Control locusts according to indicators, not to see insects to cure, generally can delay the prevention and treatment of 4 to 5 days. According to the survey, the strain rate at that time was 5 to 7 days. Fourth, reduce the number of prevention and control. The spread of cotton aphid, crawling with wings or flying wings. The breeding of cotton aphid mainly relies on an orphaned female giving birth to wingless aphids. It also produces winged migratory locusts. The aphids spread and multiply to harm the crops for some time. Seeing the locusts to be used for medicine will undoubtedly increase the number of control and dosages. It will increase the hazard to the environment. In short, in order to improve the effect of cotton aphid removal, cotton farmers should also pay attention to two points: First, in addition to the treatment of seedling mites, the drug time is good when the temperature is high before and after noon; Second, in addition to the treatment of Fuxi, due to cotton plants tall, The cotton field is close to or has been sealed, don't hesitate to take any medicine with it, and the amount of liquid per mu can't be lower than two barrels.
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