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Indian Journal of Entomology
Year : 2011, Volume : 73, Issue : 4
First page : ( 349) Last page : ( 356)
Print ISSN : 0367-8288. Online ISSN : 0974-8172.

Insect Diversity in Pigeonpea Ecosystem in Tamil Nadu

Chitra N., Soundararajan R.P.

National Pulses Research Centre, Tamil Nadu Agricultural University Vamban, 622 303, Pudukkottai, Tamil Nadu

Online published on 16 May, 2012.

Received:  August,  2011.

Abstract

Field surveys were carried out in the pigeonpea fields at National Pulses Research Centre, Vamban in Pudukkottai district of Tamil Nadu from May 2007 to April, 201 1. A total of 127 insect species under 113 genera. 59 families and 11 orders were observed in the pigeonpea ecosystem. Amongst the insect orders Coleoptera was the most diverse (31 species) followed by Hemiptera (27 species), Lepidoptera (19 species), Orthoptera (15 species), Hymenoptera (14 species), Odonata (7 species), Dictyoptera (6 species) and Diptera (4 species), Neuroptera (2 species), Ephemeroptera and Isoptera (1 species each). As per Schoenly and Zhang (1999), amongst the different functional groups, the diversity of the herbivores was the maximum (84 species), followed by the predators (23 species), omnivores (10 species), parasitoids (5 species), tourists (2 species) and the role undetermined (3 species).

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Keywords

Insects, biodiversity, pigeonpea, herbivores, predators, parasitoids, tourist.

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