Grasp the key period of control of rice and corn worms

The first generation of aphids is a major pest that harms rice and corn. If it is not controlled in time, it can cause rice dry heart rate to be more than 5%, and corn seedlings can cause more than 10% of broken stems, seriously affecting yield. According to the County Agricultural Technology Center's scientific and technical personnel recently in Tongjiang County, Tonghui, Beidu, Yongxin, Triangle, Longsheng, Shijiao, Guofu, Dongxi, open up and other places. The wintering survival rate of locusts was 89%, with 450-855 acres per mu and a weighted average of 612.3, which was slightly higher than normal. According to a survey conducted on April 8-10, the rate of phlegm removal was 85.2%, and the rate of emergence was 50.3%. It had already reached the peak of emergence. The rate of metasynthesia and phlegm was 54.6%, and the rate of emergence was 7.2%, which was about 7 days earlier than last year. 4 days in advance. It is expected that the locusts will be moderately heavy this year. All localities should pay close attention to prevention and treatment in due course. The appropriate period of prevention and cure: 1, Daqi. The first generation of maize seedlings mainly harmed, 600 meters below the area April 20-May 3, 600 meters above the area May 3-13. 2, II Huai. The main damage rice, 600 meters below the area in early May, 600 meters above the area in mid-May. Control formula (acre dosage): 1, corn borer 1 20% crushed four quail 75 grams; 2 18% 禾 Leguang 150 grams 3 20% poison glutinous heart 75 grams; the above formula optionally a watered 45 kg spray. 2 , Rice locust 4 5% Ruijin special 30-40 ml; 5 20% Toad heart 75 g; 6 20% crushed four wolfberry 75 g; 7 2.5% Jie Gong or 45% Courage 75 g; 45 kg sprayed in water. 2. Weeding in paddy field 1 Farming and agriculturing 2 packs; 2 20% Fertilizers in one pack; Mixing soil in 10 kilograms for spreading or diluting water 3 60% rice wins and one package of water in 45-60 kg spray . Note: The application time of weeding in rice field is 7-10 days after rice transplanting. After application, the water in the field is kept for more than 7 days, and the mud is not exposed in the field. If the weeding time is the same as the control time of rice aphid, it can be mixed.

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