title: Riceland mosquito management practices for Anopheles quadrimaculatus larvae.
abstract: Two separate but related studies were conducted regarding management of Anopheles quadrimaculatus larval populations in commercial rice fields near Cleveland, MS, in 2004. Study 1 was to evaluate the effectiveness of 2 treatments of aerially applied ultra-low volume applications of Bacillus thuringiensis var. israelensis (Bti) against An. quadrimaculatus larvae in dense, high-canopy mid- to late-season rice crop. Study 2 was to investigate the effect of preflood treatments of lambda-cyhalothrin (Karate), which is commonly used against rice water weevil (Lissorhoptrus oryzophilus), on An. quadrimaculatus larvae. Excellent initial, but short residual control (>99% control 1 day after treatment) was observed in the Bti-treated fields in both mid- and late-season rice. Little or no effect on mosquito larvae was observed in the lambda-cyhalothrin-treated fields. Results indicate that Bti can be effectively used by mosquito management personnel to control larval populations of An. quadrimaculatus in late-season rice fields; however, lambda-cyhalothrin did not effectively control larval An. quadrimaculatus when applied preflood to rice fields.
authors.affiliation: Department of Entomology, 319 Agriculture Building, University of Arkansas, Fayetteville, AR 72701, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Allen
authors.forename: W W
authors.initials: WW
authors.lastname: Wilkes
authors.forename: C N
authors.initials: CN
authors.lastname: Lewis
authors.forename: M V
authors.initials: MV
authors.lastname: Meisch
mesh_terms: D000818:Animals; D000852:Anopheles; D001413:Bacillus thuringiensis; D007306:Insecticides; D008922:Mississippi; D009032:Mosquito Control / Q000379:methods*; D009570:Nitriles; D012275:Oryza; D011722:Pyrethrins
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C037304:cyhalothrin