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Title: Stay or move: how Bt‐susceptible Helicoverpa armigera neonates behave on Bt cotton plants

Abstract

Abstract Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larvae occasionally have been reported to survive at management threshold levels in fields of Bollgard II ® cotton, Gossypium hirsutum L. (Malvaceae). The pattern and degree of larval survival is not easily predicted but depends on the ability of first instars to establish on host plants. Experiments were conducted with Bacillus thuringiensis Berliner (Bt)‐susceptible and Bt‐resistant larvae of H. armigera to understand how physiologically Bt‐susceptible H. armigera survive on Bt cotton plants, and examine how their first meal influences survival rates. In assays using cotton plant parts, both strains of larvae displayed similar tendencies to drop‐off specific plant parts of Bt and non‐Bt cotton. However, significantly more Bt‐susceptible larvae dropped off young leaves, mature leaves, and squares of Bt cotton compared to non‐Bt cotton plants. Egg cannibalism significantly improved the survival of Bt‐susceptible H. armigera larvae on Bt cotton plants. Larvae were more likely to eat live aged eggs, than newly laid or dead eggs. Survival significantly improved when larvae cannibalized eggs before feeding on Bt leaves. The behavior of Bt‐susceptible larvae with respect to drop‐off and egg cannibalism may help enhance their survival on Bt cotton plants.

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [4]
  1. Phu Yen University Phu Yen 620000 Vietnam, School of Biological Sciences The University of Queensland Brisbane 4072 Queensland Australia
  2. School of Biological Sciences The University of Queensland Brisbane 4072 Queensland Australia, Centre for Microscopy &, Microanalysis The University of Queensland Brisbane 4072 Queensland Australia
  3. CSIRO Agriculture and Food Australian Cotton Research Institute Narrabri 2390 New South Wales Australia
  4. School of Biological Sciences The University of Queensland Brisbane 4072 Queensland Australia
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1570773
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Entomologia Experimentalis et Applicata
Additional Journal Information:
Journal Name: Entomologia Experimentalis et Applicata Journal Volume: 167 Journal Issue: 10; Journal ID: ISSN 0013-8703
Publisher:
Wiley-Blackwell
Country of Publication:
Netherlands
Language:
English

Citation Formats

Luong, Tuyet Thi Anh, Cribb, Bronwen W., Downes, Sharon J., Perkins, Lynda E., and Zalucki, Myron P. Stay or move: how Bt‐susceptible Helicoverpa armigera neonates behave on Bt cotton plants. Netherlands: N. p., 2019. Web. doi:10.1111/eea.12837.
Luong, Tuyet Thi Anh, Cribb, Bronwen W., Downes, Sharon J., Perkins, Lynda E., & Zalucki, Myron P. Stay or move: how Bt‐susceptible Helicoverpa armigera neonates behave on Bt cotton plants. Netherlands. https://doi.org/10.1111/eea.12837
Luong, Tuyet Thi Anh, Cribb, Bronwen W., Downes, Sharon J., Perkins, Lynda E., and Zalucki, Myron P. Wed . "Stay or move: how Bt‐susceptible Helicoverpa armigera neonates behave on Bt cotton plants". Netherlands. https://doi.org/10.1111/eea.12837.
@article{osti_1570773,
title = {Stay or move: how Bt‐susceptible Helicoverpa armigera neonates behave on Bt cotton plants},
author = {Luong, Tuyet Thi Anh and Cribb, Bronwen W. and Downes, Sharon J. and Perkins, Lynda E. and Zalucki, Myron P.},
abstractNote = {Abstract Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) larvae occasionally have been reported to survive at management threshold levels in fields of Bollgard II ® cotton, Gossypium hirsutum L. (Malvaceae). The pattern and degree of larval survival is not easily predicted but depends on the ability of first instars to establish on host plants. Experiments were conducted with Bacillus thuringiensis Berliner (Bt)‐susceptible and Bt‐resistant larvae of H. armigera to understand how physiologically Bt‐susceptible H. armigera survive on Bt cotton plants, and examine how their first meal influences survival rates. In assays using cotton plant parts, both strains of larvae displayed similar tendencies to drop‐off specific plant parts of Bt and non‐Bt cotton. However, significantly more Bt‐susceptible larvae dropped off young leaves, mature leaves, and squares of Bt cotton compared to non‐Bt cotton plants. Egg cannibalism significantly improved the survival of Bt‐susceptible H. armigera larvae on Bt cotton plants. Larvae were more likely to eat live aged eggs, than newly laid or dead eggs. Survival significantly improved when larvae cannibalized eggs before feeding on Bt leaves. The behavior of Bt‐susceptible larvae with respect to drop‐off and egg cannibalism may help enhance their survival on Bt cotton plants.},
doi = {10.1111/eea.12837},
journal = {Entomologia Experimentalis et Applicata},
number = 10,
volume = 167,
place = {Netherlands},
year = {2019},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1111/eea.12837

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Cited by: 6 works
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