Hermetia illucens Control in Poultry Manure by Larviciding12

Abstract

Effectiveness of 5 larvicides at the rate of 1 gal/100 ft2 (400 ml/m2) for the control of larvae of Hermetia illucens (L.) in manure under caged laying hens, was determined. Excellent control was achieved by 0.5% RaVap® consisting of 2 lb/gal Rabon® (2-chloro-1-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate) and 0.2 lb/gal dichlorvos, and 0.5% Zytron® (O-2.4-diclilorophcnyl O-methyl isopropylphosphoramidothioale). Ronnel was slower acting but did give satisfactory control at 0.5%. Equivalent control by dimethoate was obtained with a 1% spray but not with 0.5%. Malathion gave little or no control at concentrations as high as 1%. In the presence of H. illucens larvae, larvae of the house fly, Musra domestica L . were absent. Following control of the H. illucens larvae, house fly larvae became abundant in the manure. A single larvicidal treatment may be expected to satisfactorily control H. illucens because of the slow development of that species. However, frequent retreatments may often be necessary to control the resurgent population of house fly larvae.