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将田间采回的萝卜蚜种群分成两部分,一部分用氰戊菊酯连续汰选13次,另一部分不用药汰选,连续饲养作对照。汰选前及每汰选3～4次测定1次氰戊菊酯对两种群的毒力。结果表明,对照种群对氰戊菊酯的敏感性增加3.76倍,而汰选种群对该农药的抗药性与汰选前比较增长了163.25倍,与同期饲养对照种群比较,抗性已达613.62。该汰选种群对不含氟的溴氰菊酯和氯氰菊酯存在明显的交互抗性(分别达360.7和53.9倍),对含氟的三氟氯氰菊酯、氟氰菊酯和氟胺氰菊酯也存在交互抗性,但只有7倍左右;而对马拉硫磷、氧化乐果、杀螟松、久效磷和灭多威及菊马混剂没有表现出交互抗性,为进一步探讨萝卜蚜的抗药性治理措施提供了试验依据。
The field back to the turnip population of aphids divided into two parts, part of fenvalerate continuous selection of 13 times, the other part of the drug selection, continuous feeding as a control. Toxicity of fenvalerate to the two populations was determined before selection and every 3 to 4 times. The results showed that the sensitivity of the control population to fenvalerate increased 3.76 times, while the resistance of the selected population to the pesticide increased 163.25 times compared with that before the selection, compared with the control breeding population over the same period reached 613.62. The selected population showed significant cross-resistance to non-fluorine-containing deltamethrin and cypermethrin (360.7 and 53.9 times, respectively), as well as to cyhalothrin, cyfluthrin and fluvalinate Cross resistance, but only about 7 times; but not on malathion, omethoate, fenitrothion, monocrotophos and methomyl and chrysanthemum mixture showed no cross resistance, in order to further explore the radish aphid Drug resistance measures provide the experimental basis.