Survival and reproduction of Euoniticellus intermedius (Coleoptera : Scarabaeidae) in dung following application of cypermethrin and flumethrin pour-ons to cattle

Cattle were treated with cypermethrin and flumethrin pour-ons to determine possible adverse effects of residues in dung on the survival, fecundity and fertility of Euoniticellus intermedius (Reiche). Dung from both cypermethr in- and flumethrin-treated cattle was collected 1, 2, 3, 5, 7, 14, 21 and 2 8 days after treatment, with an untreated control for each. Mortality of ad ult E. intermedius exposed to dung collected from cypermethrin-treated catt le two to seven days after treatment ranged between 80% and 100%. Cypermeth rin had no effect on adult and immature survival or on fecundity and fertil ity of E. intermedius exposed to dung collected 1, 14, 21 and 28 days after treatment. Dung collected from flumethrin-treated cattle had no apparent e ffect on adult survival, egg production, immature survival, adult emergence , fecundity and fertility of E. intermedius, except at seven days after tre atment, when fewer brood balls were produced and consequently fewer adults emerged from dung from treated animals compared with the control.