Combining pheromone-baited and food-baited traps for insect pest control: Effects of developmental period |
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Authors: | Hugh J Barclay and George E Haniotakis |
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Institution: | (1) Pacific Forestry Centre, 506 West Burnside Rd., V8Z 1M5 Victoria, B.C., Canada;(2) Department of Biology, University of Victoria, V8W 2Y2 Victoria, B. C., Canada;(3) Institute of Biology, National Research Centre, “Demokritos”, 10 Aghia Paraskevi, P. O. Box 60228, GR-153 Athens, Greece |
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Abstract: | Summary An age-structured population dynamics model is presented that incorporates pheromone-trapping and food-trapping as control
methods for an insect pest. The model yields the following results. Low rates of pest survivorship allow lower trapping rates
for control. Species with long developmental periods are easier to control than those with shorter developmental periods (other
factors being equal) due to lower net survival. The rates of pheromone trapping alone for effective control are usually very
high. The combination of pheromone and food trapping allows control with much lower trapping rates than either method alone.
Even small amounts of immigration of adult pests into the control area renders pheromone control ineffective, whereas food
traps suppress both the immigrants and the resident population. Food- (or odor-) baited traps which attract both males and
females are only somewhat more efficient than those which attract females alone. The existence of density-dependent population
regulation assists the control program substantially, but this assistance declines as food trapping becomes a more important
part of the control program. Larval competition strongly affects the required trapping rates for eradication; species in which
all larvae exert strong competition are much easier to control than those in whic the younger larvae contribute little to
the total competitive depression. |
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Keywords: | pest control pheromone model male annihilation |
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