Field Evaluation of Pesticides Applied to the Soil for Control of Insects and Nematodes Affecting Southern Peas in Georgia1

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Abstract:

Soil fumigants DD® Mixture (dichloropropane-chloroproene mixture), DBCP (1,2-dibromo-3-chloropropane). and potassium azide (KN3) , and nonvolatile pesticides aldicarb, carbofuran, disulfoton, duPont 1410 (methyl N,N-dimethyl-N-l (methylcarhamoyl) oxy)-1-thio- oxamimidate), fensulfothion (O,O-diethyl O-[p-(methyl- (methylsutinyl) phenyl hosphorothioate) , and prophos (O-ethyl S,S-dipropyl phosphorodithioate), were evaluated as soil treatments in 19170 and 1971 for control of plant parasitic nematodes and insects affecting southern peas, Vigna sinensis (Torner) Savi, in southern Georgia. In 1970 plots treated yield carbofuran had significantly taller plants, greater yield, and fewer plants infested with beet armyworms. Spodoptera exigua (Hübner), than other plots. Plants growing in plots treated with KN3 and DBCP were completely free of root galls caused by root- knot nematodes, Meloidogyne incognito (Kofoid & White) nematodes. Split applications of chemicals (1/2 replant and 1/2 postplant) were less effective than applications of the entire dosage of chemical pre- or post-plant. In 1971 control of thrips, Frankliniella spp. was best, and yield was highest in plots treated with aldicarb.

Yield decreases in 1970 were correlated with terminal growth infested with beet armyworms (r = -0.71). In 1971 yield decreases were correlated with thrips injury (r = -0.52) and numbers of root-knot nematodes per 150 cc soil (I' = -0.33).

Document Type: Research Article

Publication date: December 1, 1972

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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