Entomopathogens for control of Hypsipyla spp

Hauxwell, C., Vargas , C., & Opuni Frimpong, E. (2001) Entomopathogens for control of Hypsipyla spp. In Hauxwell, C. & Floyd, R.B. (Eds.) Hypsipyla Shoot Borers in Meliaceae : Proceedings of an International Workshop held at Kandy, Sri Lanka 20–23 August 1996. Australian Centre for International Agricultural Research, Canberra, ACT, pp. 131-139.

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Abstract

Published information on the incidence of pathogens in the field and laboratory infections of Hypsipyla spp. with entomopathogens is reviewed. In addition, some preliminary results of field collections from Ghana and Costa Rica are presented. Fungal pathogens from the Deuteromycetes have been isolated from both H. robusta Moore and H. grandella Zeller. Mermithid nematodes, Hexamermis spp., have been frequently isolated from larvae in the field and incidence of infection with these pathogens can reach significant levels. Microsporidia have been found in cadavers of larvae collected in the field but none have been identified so far. A number of pathogens of other Lepidoptera have been shown to be infectious to H. grandella , including Bacillus thuringiensis , Deuteromycete fungi and a nucleopolyhedrovirus (NPV) from Autographa californica . Hypsipyla spp. are difficult targets for microbial control, since the larvae are cryptic, occur at low density and occur sporadically. In addition, there is a low damage threshold, the plant is susceptible for a number of years and the susceptible part of the plant will rapidly outgrow any surface application. Key features of the biology of entomopathogens with relevance to the control of low density and cryptic pests are discussed. In the light of this experience, we discuss strategies to improve the possibilities of microbial control of this pest and suggest areas for research.

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ID Code: 76187
Item Type: Book Chapter
ISBN: 0642456240
Subjects: Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000)
Divisions: Current > Schools > School of Earth, Environmental & Biological Sciences
Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2001 Australian Centre for International Agricultural Research
Deposited On: 16 Sep 2014 23:15
Last Modified: 12 Oct 2015 15:12

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