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用功夫对美洲斑潜蝇 3龄幼虫进行抗性品系 (Cy -R)筛选 ,经 5 0代选育 ,抗性指数提高到 4 9.14倍。筛选前的LC50 值为 0 .0 15 2 g/L ,筛选后的LC50 值为 0 .2 5 0 6 g/L。敏感品系选育试验表明 ,经 10代筛选 ,抗性指数由筛选前的 5 .0 0倍降低至 1.0 0倍。对功夫产生抗性的品系对灭扫利和速灭杀丁有交互抗性 ,而对杀虫单、毒死蜱、害极灭无交互抗性 ,其抗性倍数分别为 6 .30倍、4 .0 7倍、1.4 1倍、1.35倍和 1.0 5倍
The resistant strain (Cy -R) of the 3rd instar larvae of Liriomyza sativae was screened with Kung-fu, and after 60 generations, the resistance index increased to 41.94 times. The LC50 before screening was 0.015 2 g / L, and the LC50 after screening was 0.2560 g / L. Sensitive lines selection test showed that after 10 generations of selection, the resistance index decreased from 5.0 times before screening to 1.0 times. The strains that developed resistance to kung fu had reciprocal resistance to the fungicide and the fast kill, while the insecticidal single and chlorpyrifos showed no cross resistance and the resistance multiples were 6.30 times and 4.0 7 times, 1.4 times, 1.35 times and 1.0 times