Trichogramma (Hymenoptera: Trichogrammatidae) Ecology in a Tropical Bt Transgenic Cotton Cropping System: Sampling to Improve Seasonal Pest Impact Estimates in the Ord River Irrigation Area, Australia

Davies, AP, Pufke, US and Zalucki, MP (2009) Trichogramma (Hymenoptera: Trichogrammatidae) Ecology in a Tropical Bt Transgenic Cotton Cropping System: Sampling to Improve Seasonal Pest Impact Estimates in the Ord River Irrigation Area, Australia. JOURNAL OF ECONOMIC ENTOMOLOGY, 102 3: 1018-1031. doi:10.1603/029.102.0321


Author Davies, AP
Pufke, US
Zalucki, MP
Title Trichogramma (Hymenoptera: Trichogrammatidae) Ecology in a Tropical Bt Transgenic Cotton Cropping System: Sampling to Improve Seasonal Pest Impact Estimates in the Ord River Irrigation Area, Australia
Formatted title
Trichogramma (Hymenoptera: Trichogrammatidae) Ecology in a Tropical Bt Transgenic Cotton Cropping System: Sampling to Improve Seasonal Pest Impact Estimates in the Ord River Irrigation Area, Australia
Journal name JOURNAL OF ECONOMIC ENTOMOLOGY   Check publisher's open access policy
ISSN 0022-0493
Publication date 2009-06
Year available 2009
Sub-type Article (original research)
DOI 10.1603/029.102.0321
Volume 102
Issue 3
Start page 1018
End page 1031
Total pages 14
Editor John T. Trumble
Alan Kahan
Place of publication United States
Publisher Entomological Society of America
Collection year 2010
Language eng
Subject 960413 Control of Plant Pests, Diseases and Exotic Species in Farmland, Arable Cropland and Permanent Cropland Environments
060808 Invertebrate Biology
C1
Abstract Trichogramma Westwood (Hymenoptera: Trichogrammatidae) cause high mortality rates in the potentially resistant pest species, Helicoverpa armigera (Hu¨ bner) (Lepidoptera: Noctuidae), and are considered integral to the resistance management plan for Bacillus thuringiensis transgenic cotton, Gossypium hirsutum L., production in the Ord River Irrigation Area (ORIA), Western Australia. Measured as percentage of parasitism, Trichogramma activity seems highly variable over time; yet, it contributes signiÞcantly to pest suppression at peak insect pest density. Environmental constraints on Trichogramma survival, especially insecticide applications, may limit their effectiveness. The decision to initiate insecticide applications in ORIA cotton crops is best delayed unless absolutely necessary to avoid disruption of Trichogramma impact on pests. Trichogramma disperse into young crops and display high intrinsic rates of increase effectively stißing Helicoverpa (Hardwick) population increase after initial egg lay during high-density years in the ORIA, and evidence suggests a possible preference for H. armigera host eggs.
Formatted abstract
Trichogramma Westwood (Hymenoptera: Trichogrammatidae) cause high mortality
rates in the potentially resistant pest species, Helicoverpa armigera (Hu¨ bner) (Lepidoptera: Noctuidae),
and are considered integral to the resistance management plan for Bacillus thuringiensis
transgenic cotton, Gossypium hirsutum L., production in the Ord River Irrigation Area (ORIA),
Western Australia. Measured as percentage of parasitism, Trichogramma activity seems highly variable
over time; yet, it contributes signiÞcantly to pest suppression at peak insect pest density. Environmental
constraints on Trichogramma survival, especially insecticide applications, may limit their
effectiveness. The decision to initiate insecticide applications in ORIA cotton crops is best delayed
unless absolutely necessary to avoid disruption of Trichogramma impact on pests. Trichogramma
disperse into young crops and display high intrinsic rates of increase effectively stißing Helicoverpa
(Hardwick) population increase after initial egg lay during high-density years in the ORIA, and
evidence suggests a possible preference for H. armigera host eggs.
Keyword percentage of parasitism
Bt transgenic cotton
biological control
temporal abundance
life tables
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Biological Sciences Publications
Ecology Centre Publications
 
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Created: Thu, 03 Sep 2009, 08:02:04 EST by Mr Andrew Martlew on behalf of School of Biological Sciences