The dual-choices tests of behavioral test were used to study the gustatory behavioral responses to caffeine of Helicoverpa armigera larvae and H. assulta larvae. Electrophysiological responses were studied by electrop...The dual-choices tests of behavioral test were used to study the gustatory behavioral responses to caffeine of Helicoverpa armigera larvae and H. assulta larvae. Electrophysiological responses were studied by electrophysiological tip recording. Behavioral experiments showed that caffeine was a feeding deterrent for both larvae, but it showed a stronger feeding deterring effect on the oligophagous H. assulta . The electrophysiological tip-recording results showed that both H. armigera larvae and H. assulta larvae had one caffeine-sensitive feeding deterrent neuron at the medial sensilla, and the electrophysiological pulse response of H. assulta larvae was significantly stronger than that of H. armigera larvae. Therefore, caffeine had a stronger feeding deterring effect on the oligophagous H. assulta than the polyphagous H. armigera . The difference in behavioral effect was closely related to the sensitivity of to caffeine the feeding deterrent neurons at the medial sensilla.展开更多
基金Supported by the National Natural Science Foundation of China(31201750)Hunan Provincial Natural Science Foundation of China(2016JJ4009)
文摘The dual-choices tests of behavioral test were used to study the gustatory behavioral responses to caffeine of Helicoverpa armigera larvae and H. assulta larvae. Electrophysiological responses were studied by electrophysiological tip recording. Behavioral experiments showed that caffeine was a feeding deterrent for both larvae, but it showed a stronger feeding deterring effect on the oligophagous H. assulta . The electrophysiological tip-recording results showed that both H. armigera larvae and H. assulta larvae had one caffeine-sensitive feeding deterrent neuron at the medial sensilla, and the electrophysiological pulse response of H. assulta larvae was significantly stronger than that of H. armigera larvae. Therefore, caffeine had a stronger feeding deterring effect on the oligophagous H. assulta than the polyphagous H. armigera . The difference in behavioral effect was closely related to the sensitivity of to caffeine the feeding deterrent neurons at the medial sensilla.
