Mortality of eggs and larvae of the face fly (Diptera:Muscidae) after exposure of adults to surface treated with BAY SIR 8514 and penfluron [Musca autumnalis]

Adult Musca autumnalis DeGeer exposed to surfaces treated with 0.025, 0.05, and 0.075 mg of penfluron or BAY SIR 8514 (2-chloro-N-(((4-(trifluromethoxy)phenyl)amino) carbonyl) benzamide) per cm super(2) for 1, 3, or 6 h were evaluated for treatment effect on egg hatch and F sub(1) larval mortality. Inhibition of egg hatch and F sub(1) larval mortality were dependent on exposure time, concentration, mating regime, and elapsed time after exposure. Exposed female flies mated with untreated males demonstrated more greatly inhibited egg hatch than exposed male flies mated with untreated females. A greater inhibition of egg hatch resulted when exposed females and males were mated to each other. Inhibition of egg hatch decreased as the flies aged. Both compounds demonstrated a greater mortality against F sub(1) face fly larvae than against egg hatch.