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Temporal and Spatial Distribution Patterns of Aphids (Homoptera: Aphididae) on Celery

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Abstract:

Populations of aphids, which could cause economic losses from produce contamination, infested celery plants in fields in the central coast area of California. Densities of aphids were higher in the fall cropping period (4 August to 26 October 1992) as compared with the spring cropping period (14 April to 6 July 1992). Aphid population densities pt>ah>d at 640.5 per plant on 22 September. Aphid populations were clumped on celery plants as indicated with Taylor's power law; h values of 1.58 and 1.69 were found in the spring and fall celery crops, respectively (overall b value of 1.68). Petioles of intermediate matU1ity generally had the highest and most consistent aphid population levels, as compared with older and younger petioles and with growing point and sucker tissue. This plant region appears to be most conducive for sampling. Ten species of aphids were collected from celery plants; Dysaphis apiifulia (Theobald) was the most common aphid species in the spling and fall crops. Myzus persicae (Sulzer) and Aphis fabae Scopoli were also relatively common aphid species infesting celery plants. Aphid captures in water pan traps and on yellow sticky traps appeared indicative of aphid densities on celery plants. In both crops, as aphid levels from the traps increased, densities on the plants increased the same sample week or the next sample week. Significant correlations were found between aphid densities from sticky traps and plant samples.

Document Type: Research Article

Publication date: April 1, 1995

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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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