Predation of the Young Larvae of Fall Armyworm, Spodoptera frugiperda by Menochilus sexmaculata

doi:10.16409/j.cnki.2095-039x.2022.11.007

Abstract

Abstract: This study aims to evaluate the biological control potential of Menochilus sexmaculata on Spodoptera frugiperda. The predation functional responses and searching efficacy of adults and the 4^th instar larvae of M. sexmaculata to the 1^st and 2^nd instar larvae of S. frugiperda were studied under the conditions of artificial climate in the laboratory. The results indicated that both adults and the 4^th instar larvae of M. sexmaculata showed strong predatory ability against the 1^st and 2^nd instar larvae of S. frugiperda, and their predation functional responses both conformed to the HollingⅡ model. The attacking efficiency, searching efficiency and the maximum daily predation quantity of adults and the 4^th instar larvae of M. sexmaculata to the 1^st instar larvae of S. frugiperda were both much higher than those to the 2^nd instar larvae, respectively, but shorter handling time was observed in the former than in the latter. Compared with adults, the 4^th instar larvae of M. sexmaculata showed a higher control efficiency against the 1^st and 2^nd instar larvae of S. frugiperda based on the a/T_h, which corresponds to the maximum daily predation quantity of 217.4 and 135.2, respectively. This study indicates that the predatory ladybug M. sexmaculata has a good potential to control the 1^st and 2^nd instar larvae of S. frugiperda, which is meaningful for the conservation of M. sexmaculata for sustainable control of S. frugiperda.

Key words: Menochilus sexmaculata, Spodoptera frugiperda, predation, functional response

CLC Number:

S476.2

QIU Liangmiao, LIU Qiquan, CHEN Xiuqin, LIU Bipao, HE Yuxian. Predation of the Young Larvae of Fall Armyworm, Spodoptera frugiperda by Menochilus sexmaculata[J]. Chinese Journal of Biological Control, 2023, 39(2): 471-477.

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