有机磷类杀虫剂对美洲斑潜蝇的防治效果

在山东青州以西葫芦为试验害虫寄主 ,测定了毒死蜱、三唑磷、乙酰甲胺磷、辛硫磷、马拉硫磷对美洲斑潜蝇幼虫LiriomyzasativaeBlanchard的田间防效。毒死蜱 (2 4g (a .i.) 667m2 )、三唑磷 (1 0g (a.i.) 667m2 )、乙酰甲胺磷 (2 0g (a .i.) 667m2 )第 3～ 7d校正防效为 97 0 9%～ 97 1 4% ,86 80 %～87 0 4% ,85 99%～ 86 2 5 %。此 6个处理药效顺序为毒死蜱 >三唑磷 >乙酰甲胺磷 (2 0g(a.i.) 667m2 )>乙酰甲胺磷 (1 5g(a.i.) 667m2 ) >辛硫磷 >马拉硫磷。在河南洛阳以甘蓝为试验害虫寄主 ,乙酰甲胺磷 (1 5g(a.i.) 667m2 )、敌敌畏 (2 5g(a.i.) 667m2 )、敌百虫 (4 5g(a .i.) 667m2 )对美洲斑潜蝇幼虫第 7d校正防效分别为 76 98% ,82 42 % ,71 1 1 %。毒死蜱对在不同寄主上美洲斑潜蝇的防效均较好

Efficiency of organophosphate insecticides to Liriomyza sativae

In the Shandong Province,larvicidal activities of chlorpyrifos,triazophos,acephate,phoxim,malathion in the field were tested to Liriomyza sativae on pumpkin.The results indicated that the efficacy of chlorpyrifos(24 g (a.i.)/667 m 2),triazophos(10 g (a.i.)/667 m 2)and acephate(20 g (a.i.)/667 m 2)after 3～7 days were 97 09%～97 14%,86 80%～87 04%,85 99%～86 25%.The efficacy of this six treatment had the sequence: chlorpyrifos > triazophos > acephate (20 g (a.i.)/667 m 2)> acephate (15 g (a.i.)/667 m 2) > phoxim > malathion.The efficacy of acephate (15 g (a.i.)/667 m 2),dichlorphos(25 g (a.i.)/667 m 2),trichlorfon (45 g(a.i.)/667 m 2)after 7 days were 76 98%,82 42%,71 11% in Henan Province on wild cabbage.Chlorpyrifos had good effect in control of L.sativae on different plants.