Entomologia Experimentalis et Applicata (2015) 154, 131-145

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Robert Mensah, David Leach, Alison Young, Nick Watts and Peter Glennie (2015)
Development of Clitoria ternatea as a biopesticide for cotton pest management: assessment of product effect on Helicoverpa spp. and their natural enemies
Entomologia Experimentalis et Applicata 154 (2), 131-145
Abstract: The Australian cotton industry is now dominated by transgenic (Bt) varieties, which provide a strong platform for integrated pest management (IPM) of Helicoverpa spp. (Lepidoptera: Noctuidae). New IPM-compatible tools are required to manage the development of resistance in Helicoverpa spp. and the control of other sucking pests. A 10-year study commenced in 2001 to identify short-range, non-volatile compounds on organ surfaces of plants that deter feeding or oviposition, or are toxic and do not support development of Helicoverpa spp. on cotton plants. The results of the initial study identified Clitoria ternateaL. (Fabaceae) as non-preferred for Helicoverpa spp. oviposition and larval feeding. The study found that C. ternatea fractionalized extract mixture (fractions 2, 3, 4, and 6) caused oviposition and feeding deterrence as well as direct toxicity to Helicoverpa spp. This study has developed an oil-based semiochemical product from C. ternatea identified in the initial study into a potential commercial product. The application of 1–2% (vol/vol) of the oil-based formulation of the C. ternatea mixture against Helicoverpa spp. on commercial transgenic and conventional cotton crops resulted in Helicoverpa spp. oviposition and larval feeding deterrence, as well as caused direct mortality to larvae. No negative effect on beneficial insects was observed. In conclusion, the ability of the oil-based C. ternatea mixture to control Helicoverpa spp. infestations, while conserving beneficial insect populations, suggests its potential for use in supplementing IPM programs to reduce the use of synthetic insecticides on transgenic and conventional cotton crops.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Robert K. Mensah

Research topic(s) for pests/diseases/weeds:
control - general

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Helicoverpa (genus) Cotton (Gossypium)