Changes in Morphological Stage of Development, Canopy Structure, and Root Nonstructural Carbohydrate Reserves of Alfalfa Following Control of Potato Leafhopper (Homoptera: Cicadellidae) and Weed Populations
Authors: OLOUMI-SADEGHI, H.; ZAVALETA, L. R.; ROBERTS, S. J.; ARMBRUST, E. J.; KAPUSTA, G.
Source: Journal of Economic Entomology, Volume 81, Number 1, February 1988 , pp. 368-375(8)
Publisher: Entomological Society of America
Abstract:Impacts of weed and insect control measures on populations of the potato leafhopper, Empoasca fabae (Harris), and various alfalfa plant parameters were studied from 1983 through 1985. Application of summer annual herbicides for the control of grass weeds produced a dual effect, increasing alfalfa density by reducing competition from grass weeds, and encouraging the presence of potato leafhopper (PLH) and thus increased crop damage by reducing plant stage of growth and stem length. Use of winter annual herbicides was associated with an increase in root total nonstructural carbohydrates (TNC) and reduced stem density, suggesting possible herbicide damage to the alfalfa crop. Insecticide applications reduced PLH damage (hopperburn) and were associated with a more fully developed and taller alfalfa crop. By separately correlating both PLH population levels and incidence of hopperburn with the plant parameters analyzed, identical trends were noted. Thus, hopperburn may be a possible indicator of insect abundance.
Document Type: Research Article
Publication date: February 1, 1988
- 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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