^(14)C-马拉硫磷及其混剂对玉米螟幼虫体表的穿透能力

STUDIES ON PENETRATION OF ^(14)C-MALATHION AND ITS SYNERGISTIC COMBINATIONS IN ASIAN CORN BORER ( Ostrinia furnacalis)

(14)~C-马拉硫磷单剂,(14)_C-马拉硫磷与敌百虫,(14)~C-马拉硫磷与NIA_(10388)、(14)~C-马拉硫磷与敌百虫和NIA_(16388)混剂分别点滴玉米螟幼虫。5小时后每头幼虫体内的放射性活度分别为277、653、645和701dpm。不同混剂点滴,幼虫体内的放射性活度分别是马拉硫磷单剂的2.36,2.33和2.53倍。可见马拉硫磷混剂对玉米螟幼虫体表有较强的穿透能力。

The penetration of 14C-malathion and its different combinations of the insecticide was compared in the larvae of Asian corn borer.The results obtained showed that more malathion entered into the larvae by using insecticide combinations than malathion alone.The data suggested that increase of the toxicity for the malathion combinations may be associated with increase of penetration rate.