Investigating population dynamics and sex structure of Exolontha castanea Chang (Coleoptera: Melolonthidae) using light traps in sugarcane fields in China

Shang Xian-Kun, Wei Ji-Li, Liu Wei, Pan Xue-Hong, Huang Cheng-Hua, Nikpay Amin, Goebel François-Régis. 2022. Investigating population dynamics and sex structure of Exolontha castanea Chang (Coleoptera: Melolonthidae) using light traps in sugarcane fields in China. Sugar Tech, 24 : 1441-1448.

https://doi.org/10.1007/s12355-021-01081-4

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Résumé : Phototaxis, population dynamics and the sex structure of Exolontha castanea Chang adults were investigated in in sugarcane fields using light traps equipped with a self-ballasted high-pressure mercury vapor lamp (SHMVL) and a frequency oscillation pest-killing light trap (FOPLT) from 2016 to 2019. Results showed that adults of E. castanea displayed phototaxis, and the number of female adults trapped accounted for more than 95% of the total, clearly evidenced that there were sexual differences in the phototaxis. The flight period of adults occurred from late April to late June, and multi-peaks were observed during this period. While the sex ratio (female/male) of the natural population approached 1: 1, these results indicated that the phototaxis of females caught was significantly higher than that of males, and it had nothing to do with the number of males and females in the field. Thus, we can conclude that the implementation of light traps could be an effective strategy for controlling E. castanea in the future, as it is the females that return to the sugarcane fields to lay their eggs.

Mots-clés Agrovoc : dynamique des populations, phototaxie, piège lumineux, sex ratio, canne à sucre

Mots-clés géographiques Agrovoc : Chine

Mots-clés complémentaires : Exolontha castanea

Mots-clés libres : Coleoptera, White grubs, SUGARCANE, Pests, Sex ratio, Light traps, China

Classification Agris : H10 - Ravageurs des plantes
H01 - Protection des végétaux - Considérations générales
L20 - Écologie animale

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

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