Abstract
Twelve models are presented to examine the feasibility of using pheromone baited traps containing chemosterilant for pest control, and to compare the efficiency of this method with the use of (i) pheromone baited traps containing insecticide, and (ii) sterile releases. It was found that the number of matings per individual has little effect on the efficiency of population control, whereas immigration of even a relatively small number of the pest species severely limits this method in its ability to control the population. The existence of density-dependent regulation on the other hand greatly enhances the effectiveness of this control method. If the birth rate greatly exceeds one young per adult per day, then the method using chemosterilants is approximately twice as efficient as either insecticides in the pheromone traps or the release of sterile males. However, if the birth rate is much less than one per day, as in tsetse, then chemosterilants are very much more efficient than either method. These differences in relative efficiency appear to depend on the frequency of mating relative to the birth and mortality rates.
Résumé
On présente douze modèles pour étudier la possibilité d’utiliser des pièges amorcés à phéromones et contenant un chémostérilisant dans la lutte contre les insectes, et pour comparer l’efficacité de cette méthode avec celle de l’utilisation (i) de pièges amorcés à phéromones et contenant un insecticide, et (ii) de libérations d’insectes stériles. On a pu constater que le nombre des accouplements par individu n’a qu’un effet marginal sur l’efficacité de la suppression des populations, alors que l’immigration même d’une nombre relativement restreint de l’espèce en question limite sensiblement l’efficacité de cette méthode. L’existence d’une régulation à partir de la densité augmente au contraire l’efficacité de cette méthode de suppression. Si le taux des naissances dépasse grandement une par adulte par jour, la méthode des chémostérilisants est à peu près deux fois plus efficace que l’utilisation d’insecticides dans les pièges ou la libération de m←es stériles. Mais, si le taux des naissances est beaucoup inférieur à une par jour (c’est le cas des tsé-tsé), les chémostérilisants sont nettement plus efficaces que ces autres méthodes. Ces différences dans l’efficacité relative semblent bien dépendre de la fréquence de l’accouplement par rapport aux taux de naissance et de mortalité.
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Barclay, H.J. Models for Pest Control Using Sex Pheromones and Chemosterilants. Int J Trop Insect Sci 8, 187–196 (1987). https://doi.org/10.1017/S1742758400007207
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DOI: https://doi.org/10.1017/S1742758400007207