Susceptibility of predaceous hemipteran species to selected insecticides on soybean in Louisiana

Toxicity of selected insecticides to hemipteran predators [i.e., Geocoris punctipes (Say), Nabis capsiformis Germar, Nabis roseipennis Reuter, and Podisus maculiventris (Say)] was evaluated by contact with foliar residues and indirectly through the consumption of prey [i.e. soybean looper, Pseudoplu...

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Bibliographic Details
Published inJournal of economic entomology Vol. 91; no. 2
Main Authors Boyd, M.L. (University of Missouri, Portageville, MO.), Boethel, D.J
Format Journal Article
LanguageEnglish
Published 01.04.1998
Subjects
BACILLUS THURINGIENSIS
BACILLUS THURINGIENSIS SUBSP. KURSTAKI
CHRYSODEIXIS
CHRYSODEIXIS INCLUDENS
GEOCORIS PUNCTIPES
GLYCINE MAX
INSECTICIDES
LOUISIANA
MORTALITY
NABIS
NABIS CAPSIFORMIS
NABIS ROSEIPENNIS
NONTARGET EFFECTS
NONTARGET ORGANISMS
PEST INSECTS
PODISUS MACULIVENTRIS
PREDATION
PREDATORS
PREY
PREY TOXICITY
RESIDUES
SIDE EFFECTS
TOXICITY
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Summary:Toxicity of selected insecticides to hemipteran predators [i.e., Geocoris punctipes (Say), Nabis capsiformis Germar, Nabis roseipennis Reuter, and Podisus maculiventris (Say)] was evaluated by contact with foliar residues and indirectly through the consumption of prey [i.e. soybean looper, Pseudoplusia includens (Walker)] previously exposed to insecticides. Methyl parathion and permethrin generally were more toxic than newer insecticides after predators were exposed to treated foliage. Chlorfenapyr caused contact toxicity equal to permethrin and methyl parathion. Exposure to foliage treated with emamectin benzoate resulted in lower mortality as compared with chlorfenapyr. Foliage treated with Bacillus thuringiensis Berliner subsp. kurstaki had the lowest contact toxicity to hemipteran predators of all insecticides tested. Standard insecticides (i.e., methyl parathion and thiodicarb) caused low indirect toxicity to hemipteran predators after consumption of treated prey. Chlorfenapyr caused significantly greater indirect toxicity than emamectin benzoate, permethrin, and thiodicarb to adult N. roseipennis. Consumption of chlorfenapry-treated prey also caused significantly greater mortality than imidacloprid, permethrin, spinosad, and thiodicarb to G. punctipes adults. These results demonstrate that most of the newer compounds were more selective than older insecticides. This greater selectivity will enable soybean producers to combat pests but conserve resident beneficial arthropod populations that help restrain pest resurgence and prevent secondary pest outbreaks
Bibliography:1997089789
H10
ISSN:0022-0493
1938-291X
DOI:10.1093/jee/91.2.401