Sequential Plans for Sampling Aphids on Sugar Beets in Kern County, California1
Authors: SYLVESTER, EDWARD S.; COX, EDWIN L.
Source: Journal of Economic Entomology, Volume 54, Number 6, December 1961 , pp. 1080-1085(6)
Publisher: Entomological Society of America
Abstract:An efficient sampling plan, to aid in the timing of treatments, is essential to the development of a practical insecticidal program for possible, use in the control of Myzus persicae (Sulzer), the major vector of the beet yellows viruses. Sequential sampling, in which decisions are made upon the accumulated results of each unit sampled, in many eases can save both time and money. Although the tendency of aphids to colonize individual plants leads to what is known as over-dispersed, or contagious, distributions, critical population levels (assumed to be approximately one aphid per plant) are reached before 100% of the plants are infested. This fact permits the use of sequential sampling plans based upon either the mean number of aphids per plant or the number of plants found to be infested. In situations of very light or very heavy populations the use of a sequential sampling plan should allow rapid decisions to be made as to whether critical population levels have been reached.
Document Type: Research Article
Publication date: December 1, 1961
- 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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