Sex Pheromone of the Podborer, Matsumuraeses falcana (WALSHINGHAM) (Lepidoptera : Tortricidae) : Activity of the Third Component, (E, Z)-7, 9-Dodecadienyl Acetate, and 3-Component Formulation

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Male moths of the podborer, Matsumuraeses falcana (WALSHINGHM) whose larvae damage soybean crops were attracted with a 1 : 1 mixture of (E)-8-dodecenyl acetate (E8-12 : Ac) and (E, E)-8, 10-dodecadienyl acetate (E8E10-12 : Ac) in field tests. The attractant activity was significantly increased when a third component, (E, Z)-7, 9-dodecadienyl acetate (E7Z9-12 : Ac), was added to the 2-component blend, though E7Z9-12 : Ac attracted no males by itself. One of the best formulations was a rubber septum impregnated with 167 μg of each of these three components, which attracted ca. 1.5 times more males than the septum impregnated with 250 μg of each of E8-12 : Ac and E8E10-12 : Ac, and ca. 5 times more males than 10 live virgin female moths. E7Z9-12 : Ac evoked the typical precopulatory behavior by male moths at the ca. 50-fold dose level of the 1 : 1 mixture of E8-12 Ac and E8E10-12 : Ac, though neither of these two components showed any sex-stimulative activity by itself.

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