Impact of Insect Damage on Loblolly Pine Seed Production

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Conelets and cones on sample branches of loblolly pine, Pinus taeda L., in the Georgia Piedmont were monitored for 2 years to determine damage from insects, seasonal pattern of losses, and overall loss of potential seed. Conelet losses were 32% in 1969 and 18% in 1970. Over 70% of this loss was unaccountable abortion or disappearance, which we attribute in part to feeding by a bug, Leptoglossus corculus (Say). For 2nd-year cones, losses were 37% in 1969 and 22% in 1970. A majority of these losses was accountable; they were caused primarily by damage from various Coneworms, Dioryctria spp., in midsummer. Survival from conelet to harvested cone was 51.4% However, harvested cones held only 42.6% of the potential seed, and only 64.8% of the harvested seeds were full; seedbugs contributed to this final stage of loss. Overall, only 14.2% of the potential seed survived to maturity.

Document Type: Research Article

Publication date: April 1, 1978

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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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