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Low-volume Applications of Azinphosmethyl, Fenvalerate, and Permethrin for Control of Coneworms (Lepidoptera: Pyralidae) and Seed Bugs (Hemiptera: Coreidae and Pentatomidae) in Southern Pine Seed Orchards

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Abstract:

Mist-blower applications of 0.9% wt/wt (AI) azinphosmethyl or 0.0625, 0.125, and 0.25% fenvalerate and permethrin repeated five or six times at monthly intervals effectively controlled cone worms, Dioryctria spp., in loblolly pine, Pinus taeda L., seed orchards in South Carolina but were less effective in Louisiana. Mist-blower applications of all concentrations of fenvalerate reduced cone worm losses by 52 to 67% in South Carolina. Permethrin at the two lowest concentrations was as effective in South Carolina, but failed to provide control in Louisiana. All three concentrations of permethrin and 0.9% azinphosmethyl, the standard, reduced seed losses caused by the leaf footed pine seed bug, Leptoglossus corculus (Say), and the shield backed pine seed bug, Tetyra bipunctata (Herrich-Schäffer), in Louisiana. Seed bug damage was too low in South Carolina to evaluate efficacy. Aerial application of azinphosmethyl at rates of 2.25 kg (AI)/ha in Louisiana and 3.37 kg (AI)/ha in North Carolina and fenvalerate at 0.75 kg (AI)/ha and 0.84 kg (AI)/ha at these same locations effectively reduced cone worm and seed bug damage. These pilot tests demonstrated that large increases in cone survival and seed yields can be attained in production seed orchards. Cone survival in the North Carolina orchard was 82% on trees aerially sprayed with azinphosmethyl and 86% on trees sprayed with fenvalerate, but only 14% on unsprayed trees. Cones from sprayed trees in this orchard averaged 132 filled seeds per cone compared to only 63 on unsprayed trees.

Document Type: Research Article

Publication date: April 1, 1985

More about this publication?
  • 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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