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“三螟一虱”即水稻二化螟、三化螟、稻纵卷叶螟和稻飞虱(包括褐飞虱、白背飞虱和灰飞虱),是水稻上最主要的害虫。它们中的两种或三种往往在水稻的孕穗期至乳熟期同期发生。一虫一药防治,费工、费力,又不经济。因此,恰当选择药剂,一次性施药防治水稻孕穗期至乳熟期发生的“三螟一虱”害虫,则可省工、省力,达到经济、事半功倍的目的。 何类药剂才有如此功效?这类杀虫剂应具备:①杀虫谱广,且防治效果好(对以上几种主要害虫一般防效
“Trilobite a louse” is the rice stem borer, Borer, C. medinalis and planthoppers (including Nilaparvata lugens, white-backed planthopper and Laodelphax striatellus), is the most important pests on rice. Two or three of them tend to occur during the booting stage of rice to the same period of milking. A worm a drug control, labor, laborious, not economical. Therefore, the proper choice of chemicals, one-time application of pesticides to prevent rice from the booting stage to milky period occurred “Trich.” A pest, you can save labor, effort, to achieve economy, with less effort. What kind of medicine have such efficacy? Such insecticides should have: ① Insecticidal spectrum is broad, and the prevention and treatment is good (for the above several main pests generally anti-efficacy