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All Journal Asia Pacific Journal of Sustainable Agriculture, Food and Energy (APJSAFE)
Aradhana Deesh
Koronivia Research Station, Ministry of Agriculture - Fiji
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Energy Environmental Science

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Biological Studies on the Natural Enemies in Suppression of Coconut Stick Insect, Graeffea crouanii (Le Guillou) in Fiji Aradhana Deesh; Ravindra Joshi; Anjeela Jokhan; Mohammed Khan; Augustine Jerard Bosco
Asia Pacific Journal of Sustainable Agriculture, Food and Energy Vol. 8 No. 1&2 (2020): December 2020
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy Network (SAFE Network)

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Abstract

Abstract — Coconut stick insect, Graeffea crouanii (Le Guillou) is one of the important pests of coconut palms in Fiji. It causes extensive leaf damage resulting in production losses. The field surveys revealed the presence of several naturally-occurring natural enemies (predators and parasitoids) on G. crouanii in the major coconut growing regions in the Fiji Islands viz., Viti Levu, Vanua Levu and Taveuni. Two species of egg parasitoids, Paranastatus verticalis Eady and Paranastatus nigriscutellatus Eady were recorded as the most prevalent natural enemies, of which P. verticalis was the dominant species. This paper presents information from field and laboratory studies on the pest and dominant natural enemy and role of P. verticalis on the population suppression of G. crouanii in Fiji. The release of P. verticalis and field sanitation were the two best management practices identified that contributed to the improvement of plant health toward the management of G. crouanii. Keywords — Cocos nucifera L., Coconut stick insect pest, Graeffea crouanii, natural enemies, Paranastatus verticalis, Fiji.
Co-Authors Anjeela Jokhan Augustine Jerard Bosco Mohammed Khan Ravindra Joshi