Pest Management Science (2005) 61, 1060-1068

G. Christopher Cutler, Cynthia D. Scott-Dupree, Jeffrey H. Tolman and C. Ronald Harris (2005)
Acute and sublethal toxicity of novaluron, a novel chitin synthesis inhibitor, to Leptinotarsa decemlineata (Coleoptera: Chrysomelidae)
Pest Management Science 61 (11), 1060-1068
Abstract: The acute and sublethal toxicities of novaluron, a novel chitin synthesis inhibitor, to a laboratory-reared insecticide-susceptible strain of Colorado potato beetle, Leptinotarsa decemlineata (Say), were determined. Novaluron exhibited excellent residual (120 h LC₅₀ = 0.42 mg litre^-1) and good direct contact (120 h LC₅₀ = 27 mg litre^-1) activity against second-instar larvae (L2). Hatch of eggs exposed by direct contact to novaluron solutions > 100 mg litre^-1 was significantly reduced, as was the ability of emerged first-instar larvae to moult. L2 from eggs exposed to > 100 mg litre^-1 novaluron weighed significantly less (P < 0.0001) than those from untreated eggs. However, L2 from eggs treated with 1 mg litre^-1 novaluron weighed significantly more (P < 0.05) than those from untreated eggs, suggesting novaluron can have a hormetic effect on L decemlineata larval development. Leptinotarsa decemlineata mating pairs fed foliage treated with novaluron at 25 or 75 g AI ha^-1 produced approximately 25% fewer egg masses and eggs per mass. Hatch of eggs on treated foliage was almost completely suppressed, and longevity of male beetles was reduced by approximately 50% when fed foliage treated with novaluron at 75 g AI ha^-1.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Cynthia D. Scott-Dupree

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Leptinotarsa decemlineata