Comparative Insecticidal Efficiency of Compounded Pyrethroids and Its Preparations Cooperated with the Several Synergists

Pyrethroid 살충제에 첨가되는 협력제에 따른 살충 효과

Comparative insecticidal efficiency between compounded pyrethroids and its preparations cooperated with several synergists was studied. As main components, Group A contained Permethrine.Phthalthrine, Group B contained Permethrine.Furameth rine and Group C contained Phthalthrine.Dichlorvos. As synergists Piperonyl Butoxide (P.B.O.), N-Octylbicycloheptene dicarboximide (MGK-264), Octachlorodipropylether (8-421) was cooperated in each group. These preparations was treated to either Blattella G. or Musca D. for comparing about insecticidal efficiency[Knock-down rate ($KT_{50},\;KT_{90}$) and cumulative mortaility(percent/hrs)]. When the synergists was added to each Group, the insecticidal efficiency was improved. The most potent synergists was P.B.O. and the potency was decreased in the rank order of S-421>MGK-264. The more the concentration of synergists was increased, the more the insecticidal efficiency was improved. The rank order was $1:5{\geq}1:4>1.3$ in all three groups. The mortality (percent) according to time was similar to either $KT_{50}\;or\;KT_{90}$. Knock-down rate was appropriate parameter for the indicator about potency.

본 연구는 Group A (Permethrine.Phthalthrine), B(Permethrin.Furamethrine) 및 C(Phthalthrine.Dichlorvos)를 공시 살충제로 하였으며, P.B.O., MGK-264 및 S-421를 협력제로 각각 선택한 후, 그 첨가 비율에 따라 Blattella G.와 Musca D.에 대한 살충효과를 비교 실험하였다. 가정용 살충제로서 유효성을 참작하여 Knock-down rate($KT_{50},\;KT_{90}$)와 누적 Motraility(percent/hrs)를 측정한 결과 공시살충제 A, B, C의 각 군에 협력제를 첨가한 시제품의 경우 살충효과가 크게 증가되었고, 첨가한 협력제 중 P.B.O의 살충효과가 가장 크게 나타났으며, 다음은 S-421>MGK-264의 순 이었다. 첨가비율에 대해서는 3종류의 첨가제모두에서 $1:5{\geq}1:4>1.3$의 순으로 증가하여 살충효과는 협력제의 농도에 따라 비례함을 알 수 있었다. 또한 시간 경과에 따른 Mortaility(percent) 역시 $KT_{50}\;또는\;KT_{90}$과 유사함에 따라 Knock-down rate가 그 효능을 증명해 주었다.