Abstract
The influence of age, sex and mating status, egg load, prior exposure to males, and time of day on the host-finding behavior of Mamestra brassicae (L.) was studied in a wind tunnel. Only 2 of the factors evaluated seem to have an influence on the insect response: age and in females, mating status. Females aged 5 d flew upwind, landed and oviposited more often on plants than those aged 3, 4, and 6 d. Females and males responded positively to cabbage plants. However, the percentage of mated females responding was significantly higher compared with virgin females, and virgin and mated males. There were no significant correlations between number of mature eggs per female and latency for taking off, random flight duration, latency for the 1st zigzagging upwind flight, number of landings, and time spent on host after landing on cabbage and chrysanthemum. No influence of prior exposure to males on female response to cabbage plants was found. Mated females did not show any difference in their response to cabbage plants during different periods of the scotophase.
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