Vibration Mechanisms of Maxillary Palpi in the Vegetable Weevil Adult, Listroderes obliquus KLUG (Coleoptera : curculionidae) during Food Searching : Studies on the Host Plant Determination of the Leaf-Feeding Insects VII

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During the olfactory tests of the vegetable weevil adults, Listroderes obliquus, with leaf alcohol and other odorous materials, it was noticed that the insects tap the glass surface near the test materials with the tips (clubs) of their antennae. This tapping behavior was observed whenever they attacked their host plant leaves or appropriate odorous materials. Experiments and observation carried out to know the role of this behavior made clear that this antennae-tapping is followed by a definite vibration of maxillary palpi (ca. 0.3 mm in length). The vibration is elicited by tactile stimuli received at the tips of the antennae but not by specific chemical stimuli. Antennae-tapping eliciting successful vibration of maxillary palpi was not influenced by sucrose, sodium chloride, citric acid and quinine-HCl, despite that the feeding behavior was significantly inhibited by citric aicd and quinine-HCl. It is, therefore, likely that the tactile receptors exist on the antennal clubs, but not the gustatory receptors. The reflex arc formed between the tip of the antenna and the maxillary palpus on each side is independent of the other side. Protrusion of maxillary palpi which is a preceding step of vibration is controlled by a mechanism different from that of the vibration. The vibration of maxillary palpi seems to correspond to a sniff in mammals.
日本応用動物昆虫学会の論文
1967-03-25