Field Testing of Pheromone Disruption on Preoutbreak Populations of Douglas-Fir Tussock Moth (Lepidoptera - Lymantriidae)

1990

1 Abb., 2 Tab., 14 Lit. Ang.

Unselbständiges Werk

10622

200091749

Synthetic sex pheromone of Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), was applied at 25 g/ha in follow fibers to four plots of 16 ha each with preoutbreak level populations in north-central California. Treatment reduced the population level of the next generation by 74 and 68%, respectively, for egg mass and larval samples relative to controls. A key egg parasite, Telenomus californicus Ashmead, was not adversely affected by the treatment.