CONTACT TOXICITY OF 34 INSECTICIDES TO SECOND-STAGE NYMPHS OF LEPTOGLOSSUS CORCULUS (HEMIPTERA: COREIDAE)

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Abstract
Second-stage nymphs of the leaffooted pine seedbug, Leptoglossus corculus (Say), were highly susceptible to most of 34 topically applied insecticides, twenty-six chemicals ad Ld50 values of less than 5 μg/g of body weight. Nine insecticides — aldicarb, aminocarb, azinphosmethyl, carbofuran, dicrotophos, FMC 45498 ((−)-(Cyano) (3-phenoxyphenyl)-methyl (+)-cis-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropane-1-carboxylate), monocrotophos, propoxur, and SD 43775 (Cyano(3-phenoxyphenyl)methyl-4-chloro-alpha-(1-methylethyl)benzeneacetate) — had LD90 values of less than 1 μg/g of body weight. There was good agreement between the relative toxicities of insecticides applied topically to the leaffooted pine seedbug in these laboratory tests and the effectiveness of several insecticides previously tested in the field.