Abstract
Practical control effect of the mating communication disruption by using synthetic sex pheromones against two species of the tortrices, Adoxophyes sp. and Homona magnamina DIAKONOFF and a common cutworm, Spodoptera litura FABRICIUS was examined in rose growing glass-and, vinyl-houses in cities of Shimada, Kakegawa and Kosai in Shizuoka Prefecture from 1985 to 1987. As for the results, the effect against the tortrices was so high that both the numbers of the insects and the damages to the plants decreased rapidly after the treatments and the population levels of the insects arrived at nearly zero. Although lesser than the tortrices, the effect against the common cutworm was also high. The number of insects was depressed during their invading period from the field into the greenhouses; their populations were also depressed during the overwintering period. Because this research was conducted with a low population level of insects in winter and under the closed environment of vinyl-houses, the pheromones must have been more effective compared to the previous researches which were carried out in tea crop fields in open spaces. It was concluded that one of the examined pheromones sold in current trade as“hamakikon”was practically effective to control the tortrices in the rose growing glass-and vinyl-houses.
