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<p>The spotted stem borer, <i>Chilo partellus</i> (Lepidoptera: Crambidae) is the key pest of maize in Asia and eastern &amp; southern Africa. As an alternative for synthetic insecticides for management of this pest recent studies have focused on behavioral manipulation strategies, especially “push pull strategy”. Besides pheromones, exploration and utilization of plant volatile compounds for developing such strategies is considered as innovative approach. We studied the plasticity of electrophysiological response of <i>C. partellus</i> to selected standard synthetic plant volatiles. Electroantennogram (EAG) recordings against plant volatiles at different age of male individuals revealed that response was significantly increases from zero-day to one-day old unmated males and thereafter it shown decreasing trend. Moreover, within a day, peak EAG response could be observed at 6&#xa0;h in scotophase. Our studies conclude that to obtain reproducible and accurate EAG response from unmated male <i>C. partellus</i>, the EAG recordings must be carried out at 6&#xa0;h into scotophase using one-day old unmated male.</p>

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Temporal Variation in Electrophysiological Responses of Male Chilo Partellus to Maize Volatiles

  • 期刊论文

  • 发表日期：

    2026年4月17日

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  • Niraj Guleria,
  • Suresh M. Nebapure,
  • S. B. Suby

摘要

The spotted stem borer, Chilo partellus (Lepidoptera: Crambidae) is the key pest of maize in Asia and eastern & southern Africa. As an alternative for synthetic insecticides for management of this pest recent studies have focused on behavioral manipulation strategies, especially “push pull strategy”. Besides pheromones, exploration and utilization of plant volatile compounds for developing such strategies is considered as innovative approach. We studied the plasticity of electrophysiological response of C. partellus to selected standard synthetic plant volatiles. Electroantennogram (EAG) recordings against plant volatiles at different age of male individuals revealed that response was significantly increases from zero-day to one-day old unmated males and thereafter it shown decreasing trend. Moreover, within a day, peak EAG response could be observed at 6 h in scotophase. Our studies conclude that to obtain reproducible and accurate EAG response from unmated male C. partellus, the EAG recordings must be carried out at 6 h into scotophase using one-day old unmated male.