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Tamarixia radiata Behaviour is Influenced by Volatiles from Both Plants and Diaphorina citri Nymphs

1
Key Laboratory of Bio-Pesticide Innovation and Application, Department of Entomology, South China Agricultural University, Guangzhou 510640, China
2
Engineering Research Center of Biological control, Ministry of Education, Guangzhou 510640, China
3
Independent Science Advisor, York YO41 1LZ, UK
*
Author to whom correspondence should be addressed.
Insects 2019, 10(5), 141; https://doi.org/10.3390/insects10050141
Received: 7 March 2019 / Revised: 12 April 2019 / Accepted: 13 May 2019 / Published: 16 May 2019
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Abstract

Tamarixia radiata (Waterston) is an important ectoparasitoid of the Asian citrus psyllid, Diaphorina citri Kuwayama, a globally destructive pest of citrus. In the present study, a Y-tube olfactometer was employed to investigate whether the parasitoid T. radiata is capable of utilizing the odour source emitted by both plants and insect hosts during its foraging. The odour sources included Murraya paniculata (L.) shoots, 1st, 2nd, 3rd, 4th, and 5th D. citri instar nymphs, both individually and in combinations. Moreover, nymph-stage choice for parasitism, including 3rd, 4th, and 5th D. citri instar nymphs, was carried out. The results indicated that female T. radiata were only significantly attracted to volatiles emitted by M. paniculata shoots, 3rd, 4th, and 5th instar nymphs of D. citri, but could not distinguish between them. T. radiata males were not attracted by odours sourced from any instar D. citri nymphs. Female T. radiata adults exhibited a significant preference to later instar nymphal stages of D. citri for oviposition. The results from this study can be used to guide further investigations on the searching behaviour of this parasitoid and its utilization in D. citri biocontrol. View Full-Text
Keywords: Tamarixia radiata; asian citrus psyllid; olfactory; nymphal instar; Murraya paniculata Tamarixia radiata; asian citrus psyllid; olfactory; nymphal instar; Murraya paniculata
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Liu, Y.-M.; Guo, S.-H.; Wang, F.-F.; Zhang, L.-H.; Guo, C.-F.; Cuthbertson, A.G.S.; Qiu, B.-L.; Sang, W. Tamarixia radiata Behaviour is Influenced by Volatiles from Both Plants and Diaphorina citri Nymphs. Insects 2019, 10, 141.

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