Field and laboratory studies of attraction of the synthetic sex pheromone to male cabbage looper moths
1969
Howland, A.F. | Debolt, J.W. | Wolf, W.W. | Toba, H.H. | Gibson, T. | Kishaba, A.N.
Catches of male Trichoplusia ni (Hubner) in traps equipped with blacklight lamps were increased for 4 weeks by the presence of the synthetic sex pheromone on sand substrate. When the pheromone was dispensed fresh each night, 0.5 mg of pheromone per trap was near optimum, 0.5 mg of pheromone per trap was near optimum, since the catch was not increased by adding more pheromone. When the diameter of the container holding a mixture of sand and pheromone was increased, catches were greater the 1st night but significantly less the 2nd and 3rd nights. Light traps baited with pheromone and mounted on barrels containing water coated with diesel oil were about twice as effective as baited survey light traps. However, pheromone alone (no lamp) suspended above the oil was not effective. A Y-tube apparatus was used in the laboratory to determine the concentration causing a 50% response by males; the response was not affected when fumes of diesel oil or cyanide were present.
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