Mundia, PM & Beesley, WN


Some Sub-lethal Effects of Three Insecticides on the Development of the Sheep Blowfly Lucilia sericata Meigen (Diptera: Calliphoridae), by P.M. Mundia and W.N. Beesley, Zambia Journal of Science and Technology, Vol.9, no.1, September 1991, Pg. 22-29.


The sub-lethal insecticides effects of the IGR cyromazine on the development of the sheep blowfly, Lucilia sericata were compared with those of the organophosphate triclorfon and the synthetic pyrethroid fluemethrin. A concentrations equivalent to their LC50 values, all three compounds significantly reduced the percentage of first and second instar larvae developing to the pupal stage in treated liver medium. The cyromazine treated group developed peculiar dark sports and anterior swellings, which persisted to the pupal stage. Sub-lethal amounts of trichlorfon topically applied to mature third instar larvae significantly reduced the percentage of adults emerging. Cyromazine and flumethrin has little or no significant effect on adult emergence at their LC50- and 10% LC50 concentrations. Gravid female flies dosed topically laid fewer viable egg batches than the control flies for each of the three compounds tested.

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