Integration of a Photoelectrically Operated Intermittent Sprayer with Action Level Thresholds for Control of Lepidopteran Pests of Cabbage
Authors: Ladd, T. L.; Reichard, D. L.; Simonet, D. E.
Source: Journal of Economic Entomology, Volume 74, Number 6, December 1981 , pp. 698-700(3)
Publisher: Entomological Society of America
Abstract:A photoelectrically operated intermittent (POI) sprayer and a continuous sprayer were used both on a weekly basis and in conjunction with the attainment of action level, insect density thresholds to apply methomyl to spring- and summer-planted cabbages for the control of the imported cabbage worm, Pieris rapae (L), and cabbage looper, Trichoplusia ni (Hübner). In the spring planting, since imported cabbage worms appeared late in the season and action levels were only exceeded in two mstances after growing plants had merged in the row, there was no difference in the amount of insecticide applied by either type of sprayer when action levels were used. The POI sprayer used to apply sprays to the spring planting on a weekly basis, however, used 21% less spray material than the continuous unit so used. With summer-planted cabbages, savings in pesticide over the amount used in once-a-week applications with the continuous sprayer were 35, 40, and 52%, respectively, for the contmuous sprayer use in conjunction with action level thresholds, the POI sprayer used on a weekly basis, and the POI sprayer used with action level thresholds. In both spring and summer plantings, quality and quantity of produce from treated plots were similar.
Document Type: Research Article
Publication date: December 1, 1981
- 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.
- Editorial Board
- Submit a Paper
- Subscribe to this Title
- Information for Advertisers
- Visit this journal's homepage
- ingentaconnect is not responsible for the content or availability of external websites