Agricultural and Forest Entomology (2005) 7, 145-151

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Sarah L. Bates and John H. Borden (2005)
Life table for Leptoglossus occidentalis Heidemann (Heteroptera: Coreidae) and prediction of damage in lodgepole pine seed orchards
Agricultural and Forest Entomology 7 (2), 145-151
Abstract: 1 Fecundity, egg hatch and nymphal survivorship of Leptoglossus occidentalis Heidemann were determined and used to develop a damage prediction formula for seed bugs in lodgepole pine seed orchards.
2 A single overwintered L. occidentalis female may lay up to 80 eggs during early and mid-season cone development.
3 Up to 83.4% of eggs that were attached to branches with tape hatched successfully, compared with 53.5% of eggs attached to needles with wire. Egg parasitism was only observed in egg masses attached with wire.
4 Egg masses attached with wire suffered approximately 30% mortality from parasitism, primarily by Gryon pennsylvanicum (Ashmead).
5 Approximately 15.1 and 2.5% of first instars survived to adulthood in 2000 and 2001, respectively. Survival of caged nymphs that were protected from predators was 14.5 and 17.8%, respectively.
6 A composite survival table indicated that 9.3% of eggs laid by L. occidentalis are expected to survive to adulthood.
7 Based on previously determined damage estimates for each life stage of feeding during three periods of cone development, a hypothetical density of one seed bug per tree early in the season will result in an expected seed loss of approximately 310 seeds.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): John H. Borden

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
Research topic(s) for beneficials or antagonists:

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Leptoglossus occidentalis Pine (Pinus)
Gryon pennsylvanicum (parasitoid) Leptoglossus occidentalis Pine (Pinus)