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Initiation Mechanism of Mating Behaviour in the Rice Stem Borer, Chilo suppressalis Walker

  • Physiology, Behaviour and Biochemistry
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Abstract

The effects of endogenous and exogenous factors on mating behaviour were investigated to clarify the mechanisms of mating initiation, as one of the fundamental studies on the rice stem borer, Chilo suppressalis. The periodicity of mating behaviour is controlled basically by an endogenous circadian rhythm, and it is further affected by exogenous factors, such as temperature, day length, light intensity, light wave length and so on. Seasonal variations of mating behaviour can be observed under field conditions. The time of the onset of mating behaviour in August was delayed about 2 hours compared with that of June. Such variation of mating periodicity can be ascribed to the change in the hours of female calling and male pheromone response under different conditions among the seasons. Some of the important behavioural and physiological phenomena concerning mating initiation of Chilo suppressalis are discussed.

Résumé

Les effets des facteurs endogènes et exogenes sur le comportement d’accouplement ont fait l’objet d’une étude afin d’éclaircir les mécanismes d’initiation à l’accouplement comme ètant l’une des recherches fondamentales menées sur le Chilo suppressalis, le fameux rongeur de tiges du rig.

La durée du comportement d’accouplement peut être controlée principalement grâce à un mouvement endogène observable par intervalle de 24 heures, lequel est par la suite affecté par des facteurs exogènes tels que la température, la durée du jour, l’intensité de la lumière, la longueur des ondes de la lumière, etc. Dans les champs, des changements peuvent être observés dans le comportement sexuel selon les différentes saisons. Ainsi comparativement au mois de juin, en août le moment du déclanchement du comportement d’accouplement avait connu un retard de 2 heures de temps. Un tel changement dans la durée du comportement d’accouplement peut être imputé au changement des heures auxquelles la femelle exprime le désir et à la réplique du phéromone mâle sous les différentes conditions climatiques selon les saisons. Certains phénomènes comportementaux et physiologiques importants relatifs à l’initiation sexuelle chez le Chilo suppressalis font l’objet d’une étude suivie.

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References

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Kanno, H. Initiation Mechanism of Mating Behaviour in the Rice Stem Borer, Chilo suppressalis Walker. Int J Trop Insect Sci 11, 579–582 (1990). https://doi.org/10.1017/S1742758400021147

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  • DOI: https://doi.org/10.1017/S1742758400021147

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