Bio-efficacy of certain chitin synthesis inhibitors on dipterous flies and mites inhabiting dung of farm animals

Dipterous flies are considered among the most important pests for man and domestic animals health. The efficacy of four insect growth regulators on dipterous larvae and mites inhabiting dung of two farm anaimals (buffalo and sheep) are compared. Also, their effectiveness on the predacious mites are discussed. Data indicated that the toxicity of the four tested IGRs, i. e., Dimilin, XRD, IKI and CME, to the dung survivors (dipterous larvae and mites) differed according to the source of dung and the occurrence of survivors themselves. In buffalo dung, Dimilin and XRD appeared to be the most toxic to the dipterous larvae and mites, respectively. While IKI gave the minimum toxicity to both survivors. On the other hand, with sheep dung an inverse trend was observed i. e., IKI and Dimilin were the most toxic to mites and dipterous larvae, respectively. Whilst, the least toxicity were obtained when CME and XRD were used on dipterous larvae and mites, respectively.