Using Trichogramma Westwood (Hymenoptera: Trichogrammatidae) for insect pest biological control in cotton crops: an Australian perspective

Davies, Andrew P., Carr, Christopher M., Scholz, Brad C. G. and Zalucki, Myron P. (2011) Using Trichogramma Westwood (Hymenoptera: Trichogrammatidae) for insect pest biological control in cotton crops: an Australian perspective. Australian Journal of Entomology, 50 4: 424-440. doi:10.1111/j.1440-6055.2011.00827.x


Author Davies, Andrew P.
Carr, Christopher M.
Scholz, Brad C. G.
Zalucki, Myron P.
Title Using Trichogramma Westwood (Hymenoptera: Trichogrammatidae) for insect pest biological control in cotton crops: an Australian perspective
Formatted title
Using Trichogramma Westwood (Hymenoptera: Trichogrammatidae) for insect pest biological control in cotton crops: an Australian perspective
Journal name Australian Journal of Entomology   Check publisher's open access policy
ISSN 1326-6756
1440-6055
Publication date 2011-05
Sub-type Article (original research)
DOI 10.1111/j.1440-6055.2011.00827.x
Volume 50
Issue 4
Start page 424
End page 440
Total pages 17
Place of publication Richmond, VIC, Australia
Publisher Wiley-Blackwell Publishing Asia
Collection year 2012
Language eng
Formatted abstract
Trichogramma Westwood egg parasitoids alone generally fail to suppress heliothine pests when released in established cotton-growing regions. Factors hindering their success include indiscriminate use of detrimental insecticides, compensation for minimal pest larval hatch due to their activity via reduced larval cannibalism or mortality in general, singly laid heliothine eggs avoiding detection and asynchronous development benefiting host over parasitoid. Yet, despite these limitations, relatively large Trichogramma pretiosum Riley populations pervade and effectively suppress Helicoverpa (Hardwick) pests in Australian Bt (Bacillus thuringiensis Berliner)-transgenic cotton, Gossypium hirsutum L., crops, especially in the Ord River Irrigation Area (ORIA) of tropical northern Australia, where their impact on the potentially resistant pest species, Helicoverpa armigera (Hübner), is considered integral to the local insecticide resistance management (IRM) strategy for continued, sustainable Bt-transgenic cotton production. When devoid of conventional insecticides, relatively warm and stable conditions of the early dry season in ‘winter’ grown ORIA Bt-transgenic cotton crops are conducive to Trichogramma proliferation and biological control appears effective. Further, there is considerable scope to improve Trichogramma's biological control potential, in both the ORIA and established cotton-growing regions, via habitat manipulation. It is proposed that Trichogramma may prove equally effective in developing agricultural regions of monsoonal northern Australia, and that environmental constraints on Trichogramma survival, and those of other natural enemies, require due consideration prior to their successful application in biological control programs.
Keyword Helicoverpa
Resistance management
Transgenic crop
Tropical cotton
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Early View (Online Version of Record published before inclusion in an issue) 16 MAY 2011

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Biological Sciences Publications
 
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Created: Wed, 07 Sep 2011, 13:27:40 EST by Gail Walter on behalf of School of Biological Sciences