title: Field evaluation of controlled release pellet formulation of methoprene against chironomid midges in man-made lakes.
abstract: The duration of the efficacy of 4% methoprene pellets against emergence of chironomid midges, Chironomus stigmaterus Say, Goeldichironomus amazonicus (Fittkau) and Tanypus imperialis Sublette, in man-made lakes supplied with tertiary effluent water in Palm Desert, California, was dose dependent. For C. stigmaterus and T. imperialis, the rate of 4.5 kg/ha of the controlled release pellet formulation of 4% methoprene yielded > 90% control for 3 wk and 75% control in the 4th week, the rate of 3.4 kg/ha provided > 90% control for 2 wk, and the rate of 2.25 kg/ha provided control for 1 wk. Goeldichironomus amazonicus was under 90% control for 2 wk at the rate of 4.5 kg/ha and 1 wk at the rates of 3.4 kg/ha and 2.25 kg/ha.
authors.affiliation: Department of Entomology, University of California, Riverside 92521, USA.
authors.forename: B B
authors.initials: BB
authors.lastname: Lothrop
authors.forename: M S
authors.initials: MS
authors.lastname: Mulla
mesh_terms: D000818:Animals; D002140:California; D002683:Chironomidae; D004175:Diptera; D005069:Evaluation Studies as Topic; D007300:Insect Control / Q000379:methods; D007814:Larva; D008726:Methoprene; D013997:Time Factors
chemical_list: D008726:Methoprene