Abstract
In-furrow planting applications of Di-Syston® ( O,O -diethyl S-2-(ethylthio)ethyl phosphorodithioute) and phorate controlled heavy infestations of western flower thrips, Frankliniella occidentalis (Pergande) on cotton seedlings for 7 and R weeks, respectively. Spray applications of methy1parathion and methyl parathion plus toxaphene also controlled thrips, but toxaphene alone did not. Di-Syston and phorate applied as side dressings to cotton plants 9 weeks after planting did not significantly reduce populations of lygus bugs, Lygus lineoloris (Palisot de Beauvois), L. Hesperus Knight and L. elisus Van Duzee, and cotton fleahoppers, Spanogonicus albofasciacus Reuter. Plant stands were not significantly affected by the treatments although yield data indicate that fruiting and plant maturation were delayed by the phorate treatments. The results showed that early-season thrips control on cotton in New Mexico significantly increased yields, and that in-furrow applications or Di-Syston were especially effective.
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