PMID: 15230319Jul 3, 2004Paper

Susceptibility of the leaf-eating beetle, Galerucella calmariensis, a biological control agent for purple loosestrife (Lythrum salcaria), to three mosquito control larvicides

Environmental Toxicology and Chemistry
T Peter Lowe, Troy D Hershberger

Abstract

We evaluated the susceptibility of Galerucella calmariensis, a species used to control purple loosestrife (Lythrum salicaria), to three mosquito control larvicides. Larvae and adults were fed loosestrife cuttings dipped in Abate (< or = 375 g x L(-1)), Altosid (< or = 250 g x L(-1)), and Bacillus thuringiensis var israeliensis (Bti) (< or = 110 g x L(-1)). Eggs on cuttings were dipped in the same concentrations. Pupae were immersed in Abate and Altosid solutions (< or = 474.4 microg x L(-1) and < or = 1,169.2 microg x L(-1), respectively). Hatching success of eggs dipped in Abate (> or = 3.75 g x L(-1)) was reduced significantly and survival was significantly lower among larvae and adults eating cuttings dipped in Abate (> or = 0.17 g x L(-1) and > or = 2.27 g x L(-1), respectively). Hatching success of eggs dipped in Altosid (> or = 2.52 g x L(-1)) was reduced significantly. With exposure to Altosid, larval survival to pupation and adult emergence was reduced significantly at concentrations of > or = 2.92 g x L(-1) and > or = 0.63 g x L(-1), respectively. Altosid (> or = 0.23 g x L(-1)) also delayed the onset of pupation and adult emergence among larvae that survived to pupate. Larvae that survived with exposure to Altosid (> ...Continue Reading

Citations

Oct 3, 2013·PloS One·Jeffrey F KellyPhillip B Chilson

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