What kind of medicine is used to beat the rice leaf roller?

What kind of medicine is used to beat the rice leaf roller? Please introduce that the occurrence of rice leaf roller is characterized by early migration, many peaks, large number of moths, repeated occurrence of five (3) and six (4) generations, and serious natural harm. Due to the large amount of nitrogen fertilizer in the late stage of high-yield cultivation and the expansion of cultivation area such as direct seeding rice and mechanical transplanting rice, the growth period of rice is delayed and the growth is good in the later stage, which is more conducive to the occurrence of the sixth (4) generation. It is estimated that the occurrence degree of rice leaf roller in our province in 2007 is still 4-5, including 3-4 in northern Jiangsu, 4-5 in southern Jiangsu and 4-5 in central Jiangsu, which is similar to the previous year, and the estimated occurrence area is 65 million mu, which is similar to that of the previous year. The control of rice leaf roller should adhere to the control strategy of "before and after treatment", select drug species scientifically and strictly control the use of drugs from the peak of egg hatching to the stage of young larvae to ensure the effect of control. The main results are as follows: (1) adhere to the chemical control strategy of "before and after treatment", and move the control pass forward. For example, the fourth (2) generation migrates early and has a large amount in the main falling areas such as southern Jiangsu and along the Yangtze River, which is beneficial to the occurrence of rice leaf roller in the same year. A targeted control should be carried out in the first and middle of July to reduce the number and occurrence degree of local insect sources in the fifth (3) generation. (2) grasp the appropriate period of prevention and control. At present, most pesticides have poor control effect on advanced instar larvae, especially Bombyx mori toxins, so the control time should be advanced to the peak of egg hatching to the peak of low instar larvae to improve the control effect. (3) Scientific selection of drugs. Vigorously promote Regent, chlorpyrifos, probophos, Daofengsan, Sanfu and other efficient agents, ban pyrethroids, methamidophos and other pesticides. You can use 48% chlorpyrifos 80ml 100ml per mu, or 5% fipronil 30ml, or 40% propiophos 80ml 100ml, or 25% insecticidal double water agent 250ml, or 90% insecticidal single wettable powder 50g, plus water spray control. It should be noted that Shachongshuang and other sand silkworm toxin pesticides should not be used in silkworm areas to avoid drug damage to silkworms. Click to get more pesticide application techniques