Pink Bollworm Suppression Through Crop Termination
Authors: Watson, T. F.; Carasso, F.M.; Langston, D. T.; Jackson, E. B.; Fullerton, D. G.
Source: Journal of Economic Entomology, Volume 71, Number 4, August 1978 , pp. 638-641(4)
Publisher: Entomological Society of America
Abstract:Four irrigation termination dates and 3 levels of Pectinophora gossypiella (Saunders) infestations were evaluated over a 3-yr period for effects on cotton-lint yields and overwintering pink bollworm populations. Results indicated that an optimum last-irrigation date in the Yuma valley can be utilized which maintains yields and at the same time minimizes the number of pink bollworm larvae successfully overwintering. A last-irrigation date of ca. Aug. I accomplished both. An earlier termination date caused significant yield reductions while later dates, although maintaining yields, resulted in significantly greater moth emergence the following spring.
A comparison of 3 levels of infestation showed that untreated infestations caused significant yield losses when compared to those treated with insecticides on schedule from the time of 1 st boll formation or from the time when a 15% boll infestation level was reached. Comparisons among yields from any of the irrigation-termination treatments showed no significant difference between the 2 control schedules. However, when comparing yields among all irrigation-termination treatments relative to level of control, treatments initiated at 1st boll formation did significantly increase yields.
The utilization of production practices to shorten the growing season while maintaining yields resulted in a conservation of irrigation water, a decrease in insecticide usage, and a reduction in overwintering pink bollworm larvae. On an area-wide basis this has the potential of relegating the pink bollworm to minor-pest status.
Document Type: Research Article
Publication date: August 1978
- 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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