Efficacy of Vacuum Machines for Lygus hesperus (Hemiptera: Miridae) Control in Coastal California Strawberries
Authors: PICKEL, CAROLYN; ZALOM, FRANK G.; WALSH, DOUGLAS B.; WELCH, NORMAN C.
Source: Journal of Economic Entomology, Volume 87, Number 6, December 1994 , pp. 1636-1640(5)
Publisher: Entomological Society of America
Abstract:Three representative suction machines were evaluated for control of Lygus Hesperus (Knight) on strawberries for two growing seasons in production fields. Weekly and twice-weekly vacuum passes through a field were compared with bifenthrin applications in 1989. Weekly and twice-weekly vacuum passes were compared with bifenthrin (0.11 kg [AI]/ha) and malathion (1.26 kg [AI]/ha) sprays applied using a degree-day phenology model and with a combination of malathion and weekly vacuuming in 1990. All three machines reduced damage caused by L. Hesperus when compared with the untreated control. The three-bed vacuum is the largest machine, with the highest air flow, tested, resulting in a significant reduction in damage compared with the untreated. The smaller one-bed and two-bed machines did not decrease the numbers of nymphs or damage. However, the treatments in which vacuum machines were used exclusively had damage that was not economically acceptable. Twice-weekly vacuum passes did not improve L. Hesperus control compared with weekly vacuum passes. Weekly vacuum passes combined with malathion sprays were no better than either treatment alone. Bifenthrin provided effective control but resulted in spider mite (244.6 mites per leaflet) population increases after 3-4 wk. Weekly vacuum treatments provided control of L. Hesperus equal to that of one or two applications of malathion.
Document Type: Research Article
Publication date: December 1, 1994
- 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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