论文部分内容阅读
果园害虫的防治常出现喷药后害虫仍治不死的现象。现就如何判断害虫产生抗药性及有关对策谈点看法。 一、害虫抗药性的判断: 判断害虫是否产生抗药性,首先要考虑使用药剂的有效成分及理化性质是否前后一致。其二要考虑施药是否均匀,施药技术是否前后一致。其三害虫的虫态、龄期及生理状态是否一致。其四前后施药的环境条件如温度、湿度、施肥及营养条件是否一致。在此基础上,观察有无下列现象发生。
Orchard pest control often appears after spraying the pest still cure undead phenomenon. Now on how to determine the resistance of pests and related measures talk about point of view. First, the pest resistance to determine: to determine whether the pest resistance, we must first consider the use of pharmaceutical ingredients and physical and chemical properties of the same before and after. The second is to consider whether the application is uniform and whether the application techniques are the same. The three insect pests, age and physiological status are the same. The four environmental conditions before and after the application of pesticides such as temperature, humidity, fertilization and nutrient conditions are the same. On this basis, observe whether the following phenomena occur.