The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
The University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants ptera: Noctuidae) on Bt cotton and non-Bt cotton plantsLuong, Thi Anh Tuyet Bsc. MPh.J thesis submitted for the degree of Doctor of Philosophy at The University of Queensland in 2016 The School of Biological SciencesAbstractHeìicoverpa armigera (Hiỉbner) (Lepidoptera: Noctuidae) has caused poor yiel The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants ds to a range of agricultural crops, particularly to cotton. Pesticides have been used to control this pest with serious undesirable side effects, incThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
luding the rapid development of high levels of resistance. Since 1996. genetically modified cotton (Bt cotton) has been planted to control H. armigeraThe University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants has shown that the survival of these larvae on Bt cotton is not necessarily due to physiological resistance, and behavioural resistance has been inferred. Extensive woik on various aspects of behaviour of H. armigera in Australian has been conducted; however, to date those experiments were carried o The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants ut using a Bt-susceptible H. armigera strain. Experiments in this thesis weie undertaken with both physiologically Bt-resistant and Bt-susceptible linThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
es of H. armigera. One might expect larvae that are susceptible to Bt to show differences 111 behaviour in comparison to Bt-resistant larvaeOvipositioThe University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants 1 tenns of Bt toxin on which to lay eggs. There was one exception in that Bt-susceptible moths were more likely to lay eggs on squares of Bt cotton plants than those of non-Bt cotton. As expected the mortality of Bt-susceptible H. annigera larvae was significantly higher on structures of Bt cotton p The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants lants than on those structures of conventional cotton, and survival was greater on flowers than on other structures of Bt cotton.Bt-susceptible neonatThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
es of H. armigera. which were significantly heavier, could starve longer and recover better than Bt-resistant neonates. Although H. armigera neonates The University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants n on non-Bt diet and move off Bt diet. These behaviours may have allowed them to survive in a Bt environment. and led to a higher percentage of survival and pupation in situations where a choice was offered.The behaviour of Bt-susceptible larvae, which differed from Bt-resistant larvae, could help t The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants hem avoid Bt toxin by moving offBt substrates (drop-off behaviour) or staying on Bt substrates but eating then conspecific eggs and so survive the firThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
st instar stage (cannibalism behaviour). There was a significant difference in the numbers of Bt-susceptible larvae dropped off the two lines of cottoThe University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants nd flowers, and this may offer an opportunity for them to survive on Bt-cotton plants. The survival of Bt-$usceptible H. armigera larvae significantly improves on Bt cotton plant when they cannibalize eggs before feeding on theiiplant. Cannibalism may play a significant pail in the survival of Bt-su The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants sceptible H. armigera larvae on Bt cotton plants. Egg cannibalism could explain the relatively small, but surpnsing number of Bt-susceptible larvae suThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
rviving in Bt cotton fields.In conclusion, subtle differences in the behaviour of Bt-$usceptible female moths and first instar H. armigera larvae may The University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants more nutrient rich have higher chances to survive. In addition, egg cannibalism contributes to the higher survival of Bt-susceptible larvae on other structures of Br cotton plants. Larvae can move off plant parts with high Bt levels and may encounter less toxic plant parts. Bt-susceptible larvae ca The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants n survive without food for 48 11. suggesting they have time to re-establish on less Bt toxic plant parts after moving away from higher toxic areas.iiiThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
Declaration bv authorThis thesis /5 composed of my original work, and contains no material previously published or written by another person except whThe University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants esis.I have clearly stated the contribution of others to my thesis as a whole, including statistical assistance, survey design, data analysis, significant technical procedures, professional editorial advice, and any other original research work used or reported in my thesis. The content of my thesis The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants is the result of work I have carried out since the commencement of my research higher degree candidature and does not include a substantial part of wThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
ork that has been submitted to qualify for the award of any other degree or diploma 111 any university or other tertiary institution. I have clearly sThe University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants ged with the University Library and. subject to the policy and procedures of The University of Queensland, the thesis be made available for research and study in accordance with rhe Copyright Act 1968 unless a period of embargo has been approved by the Dean of the Graduate School.I acknowledge that The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants copyright of all material contained 111 my thesis resides with the copyright holder(s) of that material Where appropiiate I have obtained copyright peThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
rmission from the copyright holder to reproduce material 111 this thesis.ivPublications duiino candidiltUlfT.T.A. Luong. M.p. Zalucki. B. Cribb, L.E. The University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants (Hiibner) (Lepidoptera: Noctuidae) on genetically modified and conventional cotton Bulletin of Entomological Research (Accepted, 2016/Publications included in this thesisChapter 2T.T.A. Luong. M.P. Zalucki. B. Cribb. L.E. Perkins and S.J. Downes. Oviposition site selection by adults and the surviva The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants l of susceptible and resistant fust instar larvae of Helicoverpa armigera (Hiibner) (Lepidoptera: Noctuidae) on genetically modified and conventionalThe oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants
cotton. Bulletin of Entomological Research (Accepted. 2016)A modified and re-foimatted version of this has been incorporated into Chapter 2.ContributoThe University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (Lepidop The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants ed experiments (20%) Wrote and edited paper (15%)Lynda E. Perkins (Co-supervisor)Wrote and edited paper (5%)Sharon J. Downes (Co-supervisor)Wrote and edited paper (5%)Bronwen Cribb (Co-supervisor)Wrote and edited paper (5%)V The oviposition and movement behaviour of bt resistant and bt susceptible helicoverpa armigera (hubner) (lepidoptera noctuidae) on bt cotton and non bt cotton plants The University Of QueenslandAUSTRALIAThe oviposition and movement behaviour of Bt-resistant and Bt-susceptible Helicoverpa armigera (Hiibner) (LepidopGọi ngay
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