Park, S.-C. 1996 Close range attraction and field trapping of Matsucoccus thunbergianae males by natural and synthetic pheromones.. Proceedings of the 1996 International Symposium on Insect Control with Pheromones.

Notes: [Conference held on October 18-19 in Suwon, Korea.] Pheromone-associated behavior of the black pine bast scale, Matsucoccus thunbergianae, was studied in laboratory and field. In laboratory bioassays, puffs of air from a medicine dropper treated with natural or synthetic pheromone attracted males. Threshold concentrations for male attraction with crude female extract, matsuone with unknown stereochemistry (1), its positional isomer (2), (6R,10R)-matsuone (3), and (6S,10S)-matsuone (4) were 2 x 10-4 female equivalents, 400 fg, 5 pg, 16 fg, and 150 pg, respectively. Males attempted copulation with dummy females treated with natural pheromone or pheromone 3. Males followed scent trails deposited by females. Takeoff by males were not enhanced by pheromone but appeared spontaneous. Immediately after takeoff, males did not respond to pheromone. In a dense forest, more males were flying near the crown top than near the forest floor, whereas in a forest with low crown closure male flight densities were not different between heights. In a forest with low crown closure or in open areas, males flying at lower altitudes responded to pheromone better than those at higher ones. Males did not appear to land on the exact spot of pheromone source but rather fly around it and land on the substrate encountered. In detecting new scale infestations, use of pheromone traps was more effective than customary detecting procedures.