| Autor: |
Mertins, J. W., Coppel, H. C., Karandinos, M. G. |
| Zdroj: |
Population Ecology; September 1975, Vol. 17 Issue: 1 p77-84, 8p |
| Abstrakt: |
The virgin female introduced pine sawfly, Diprion similis(Hartig), produces a powerful sex pheromone capable of attracting males. Pending chemical identification of the substance, a pilot study in male annihilation is under consideration. A mathematical model was developed to assess the feasibility of population suppression using pheromone-baited traps. Departure from preexisting population models resulted chiefly from the arrhenotokous nature of the sawfly. The model predicts alternating sawfly generations which undergo first a large shift in the sex ratio but no population reduction, followed by a large decrease in population size with a moderating sex ratio. Four generations of intensive trapping would theoretically be sufficient to eliminate the sawfly from an isolated area. |
| Databáze: |
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