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Attraction of the cabbage looper to host plants and host plant odor in the laboratory

Landolt, Peter J.
Entomologia experimentalis et applicata 1989 v.53 no.2 pp. 117-123
Apium graveolens, Brassica oleracea, Glycine max, Solanum lycopersicum var. lycopersicum, Tradescantia pallida, Trichoplusia ni, adults, air, cabbage, celery, cotton, females, flight, glass, host plants, jars, males, odors, scotophase, soybeans, tomatoes
In a laboratory flight tunnel, mated female, unmated female, and male adult cabbage loopers, Trichoplusia ni (Hübner), exhibited chemically mediated anemotaxis (attraction) in response to intact potted cabbage plants (Brassica oleracea L.), leading to contact with the plant. Similar attraction responses were also observed by mated females to potted soybean (Glycine max (L.)), tomato (Lycopersicon esculentum Miller), and celery (Apium graveolens L.) plants in noncompetitive comparisons. Mated females, unmated females, and males flew to cabbage plants throughout the scotophase. Response rates for mated females were higher than for unmated females and males. Mated female cabbage loopers were attracted by odors of cabbage, soybean, tomato, or celery piped into a flight tunnel from single plants held in glass jars and not to odors of the non-host plant Setcreasea purpurea, or to humidified air. They were also attracted to water washings of cabbage at dosages of 0.4 to 2.0 gram equivalents, when presented on cotton dental wicks in the flight tunnel.