Female calling behaviour and electrophysiological response of male to pheromone gland extracts of castor semilooper, Achaea janata L. (Lepidoptera: Noctuidae) were studied under laboratory conditions. Adult emergence occurred only at scotophase period with maximum of 58% male and 53% female moths during 6th and 7th hour of scotophase. Females exhibited a characteristic calling posture by extruding the pheromone gland from the tip of the abdomen. Both female age and time in the scotophase significantly influenced calling. Calling initiated during second scotophase and maximum calling occurred during fourth scotophase (66.7%). Most of the female calling (41.8%) occurred during 9th hour of the scotophase. Extracts of female pheromone gland assayed in electroantennogram elicited hyper sensitive reaction in male moths with a response of -2.745 mV. The present study gives detailed information on the behavioural biology of A. janata and optimal time for the pheromone extraction, which could facilitate exploiting pheromone technology for the monitoring and mass trapping of this pest in castor.
Online ISSN: 1459-0263Year: 2015, Vol. 13, Issue 2, pages 94-97.Publisher: WFL.
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