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Information Journal Paper

Title

STUDY ON THE MORTALITY AND REPELLENCY EFFECTS OF THREE INSECTICIDES ON APHELINUS MALI (HALDEMAN) (HYM.: APHELINIDAE)

Pages

 Start Page 27 | End Page 33

Abstract

 In a laboratory study the effect of three insecticides (pirimicarb, PYMETROZINE and SPINOSAD) was evaluated on APHELINUS MALI a parasitoid of woolly apple aphid. To investigate the contact effect, adults were caged for 16 hours in petri-dishes containing apple leaves sprayed with each insecticide. To determine the oral toxicity in the same period of time, other petri-dishes containing filter paper soaked in poisoned solution of 10% sugar were used. To determine the repellency effect of the insecticides in question, we used busvine Y shape tube and host choice experiment between treated and untreated leaf disks was carried out. The results revealed that the rate of mortality was 89.43 and 89.01% SPINOSAD in contact and oral testes respectively. In the case of PYMETROZINE and in similar tests 78.85 and 62.72% mortality was observed. Moreover, SPINOSAD and PIRIMICARB showed marked repellency effect on the adult stage of A.mali while PYMETROZINE didn’t show similar effect.

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