Effect of Overstory Density of Ips pini (Coleoptera: Scolytidae) Performance in Ponderosa Pine Slash
Authors: VILLA-CASTILLO, JAIME; WAGNER, MICHAEL R.
Source: Journal of Economic Entomology, Volume 89, Number 6, December 1996 , pp. 1537-1545(9)
Publisher: Entomological Society of America
Abstract:We evaluated the interactive effects of light intensity and aspect of small ponderosa pine, Pinus ponderosa Douglas ex Lawson, logs on the performance of pine engraver, Ips pini (Say). Low, moderate, and high light intensity (21,000, 47,000, and 67,000 lux, respectively), and top and bottom aspects of logs were crossed in a factorial experiment replicated in 4 blocks of previously thinned pole-size ponderosa pine. Logs exposed at high natural light intensity were attacked less than logs exposed at low to moderate sunlight. Insects attacking logs exposed to high light intensity exploited the subcortical environment scantily, which led to a low net brood production. Moisture content of phloem was positively correlated with brood production. However, the highest moisture content promoted interspecific competition from other wood borers, which resulted in low net brood production when moisture content of the phloem was high.
Document Type: Research Article
Publication date: December 1, 1996
- 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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