The Impact of Moth Migration on Apparent Fecundity Overwhelms Mating Disruption as a Method to Manage Spruce Budworm Populations

Forests

Richard Trudel¹  Johanne Delisle²  Jacques Régnière²  Alain Dupont³ 

[1] Consultant en Entomologie RT Enr., 342 Saint-Joseph, Lévis, Québec, QC G6V 1G2, Canada;Natural Resources Canada, Canadian Forest Service, PO Box 10380 Stn Ste-Foy, Quebec, QC G1V 4C7, Canada;Société de Protection des Forêts contre les Insectes et Maladies, 1780 Rue Semple, Quebec, QC G1N 4B8, Canada;

关键词: spruce budworm;    moth;    tortricidae;    Choristoneura fumiferana (Clemens);    forest protection;    early intervention strategy;    pheromone mating disruption;    migration;    dispersal;   

DOI  :  10.3390/f10090775

来源: DOAJ

【 摘 要 】

Aerial applications of a registered formulation of synthetic spruce budworm female sex pheromone were made in 2008, 2013 and 2014 to disrupt mating in populations of this forest insect pest in Quebec, Canada. Each year, the applications resulted in a 90% reduction in captures of male spruce budworm moths in pheromone-baited traps. A commensurate reduction in mating success among virgin females held in individual cages at mid-crown of host trees was also obtained. However, there was no reduction in the populations of eggs or overwintering larvae in the following generation (late summer and fall). The failure of this approach as a viable tactic for spruce budworm population reduction could have resulted from considerable immigration of mated females, as evidenced by high rates of immigration and emigration that caused steep negative relationships between apparent fecundity and the density of locally emerged adults.

【 授权许可】

Unknown