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Area-Wide Pheromone Trapping of Helicoverpa zea and Heliothis phloxiphaga (Lepidoptera: Noctuidae) in the Sacramento and San Joaquin Valleys of California

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In 1986 and 1987, traps baited with the pheromone of Helicoverpa zea (Boddie) were operated adjacent to fields of processing tomatoes (LycopeTsicon escutentum Miller) in the Sacramento and San Joaquin valleys of California to determine the seasonal flight patterns of male H. zea and Heliothis phloxiphaga Grote & Robinson. The latter species was attracted to the pheromone of H. zea and was commonly captured in traps. Results indicate there are at least two generations of H. zea per year in the Sacramento and San Joaquin valleys. In general, trap catches of H. zea increased rapidly starting in mid-August and peaked during late August or early September. Tile timing of trapping events, defined as first catch, first peak, initiation of late peak, and late peak, was similar among locations monitored. This indicated that regional monitoring of this pest may be feasible, although further effort is needed to define early-season events better. Males of H. phloxiphaga were captured at all locations; these were generally trapped in greatest numbers in May and usually exceeded the numbers of H. zea captured from February to June. The capture of H. phloxiphaga in traps intended for H. zea can make interpretation of trap catches difficult, especially early in the season. Moon phase did not appear to influence the timing of peaks in H. zea trap catch.

Document Type: Research Article

Publication date: June 1, 1991

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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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