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对室内筛选褐飞虱NilaparvatalugensSt l对马拉硫磷抗性及羧酸酯酶、乙酰胆碱酯酶的连续变化进行了研究。结果表明 ,抗性发展在不同世代之间存在一定的变化。LD50 的最大变化发生在第 3代和第 5代之间。在筛选的前 5代 ,羧酸酯酶活性上升与马拉硫磷抗性变化存在很好的相关性 ,而乙酰胆碱酯酶敏感性在第 6代和第 8代间的变化与抗性发展存在很好的相关性。可见 ,羧酸酯酶活性的上升在抗性发展的早期阶段起重要作用 ,而乙酰胆碱酯酶不敏感在抗性发展的后期阶段起更重要作用。
Indoor screening of Nilaparvatal dragins St l of brown planthopper (Nilaparvata lugens) was conducted to study the continuous changes of malathion resistance and carboxylesterase and acetylcholinesterase. The results showed that there was a certain change in the development of resistance between different generations. The biggest change in LD50 occurred between the 3rd and 5th generations. In the first 5 passages of screening, there was a good correlation between the increase of carboxylesterase activity and the change of malathion resistance, while the change of acetylcholinesterase sensitivity and the development of resistance existed between the 6th and the 8th generation Very good correlation. It can be seen that the increase of carboxylesterase activity plays an important role in the early stage of resistance development, whereas the insensitivity of acetylcholinesterase plays a more important role in the later stage of resistance development.