Populations of Corn Earworm and Associated Predators After Applications of Certain Soil-Applied Pesticides to Soybeans1234

1 February 1979

journal article
research article
Published by Oxford University Press (OUP) in Journal of Economic Entomology

Vol. 72 (1) , 97-100
https://doi.org/10.1093/jee/72.1.97

Abstract

Eggs, larvae, and associated insect predators of Heliothis zea (Boddie) were sampled in soybean plots treated with aldicarb, carbofuran, ethoprop, fensulfothion, and phorate. There was no ovipositional preference by the corn earworm for treated or untreated soybeans. However, aldicarb treated plots contained up to 7X more larvae than untreated plots or plots treated with other soil-applied pesticides. Numbers of Orius insidiosus (Say), Geocoris punctipes (Say), and Nabis spp. were inversely related to H. zea numbers. An overspray of methyl parathion resulted in a similar effect on H. zea and its predators as observed in aldicarb treated plots. Soybean yields were reduced in plots treated with aldicarb, methyl parathion, and a combination of these pesticides.

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