نتایج جستجو برای: the cotton bollworm

تعداد نتایج: 16060523  

2012
Neil I. Morrison Gregory S. Simmons Guoliang Fu Sinead O’Connell Adam S. Walker Tarig Dafa’alla Michelle Walters John Claus Guolei Tang Li Jin Thea Marubbi Matthew J. Epton Claire L. Harris Robert T. Staten Ernest Miller Thomas A. Miller Luke Alphey

The sterile insect technique (SIT) is an environmentally friendly method of pest control in which insects are mass-produced, irradiated and released to mate with wild counterparts. SIT has been used to control major pest insects including the pink bollworm (Pectinophora gossypiella Saunders), a global pest of cotton. Transgenic technology has the potential to overcome disadvantages associated w...

2017
Qiang Han Zhenzhen Wang Yunxin He Yehui Xiong Shun Lv Shupeng Li Zhigang Zhang Dewen Qiu Hongmei Zeng

RNA interference (RNAi) has been developed as an efficient technology. RNAi insect-resistant transgenic plants expressing double-stranded RNA (dsRNA) that is ingested into insects to silence target genes can affect the viability of these pests or even lead to their death. HaHR3, a molt-regulating transcription factor gene, was previously selected as a target expressed in bacteria and tobacco pl...

2014
John A. Byers Steven E. Naranjo

1. The pink bollworm moth Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) is one of the most destructive pests in agriculture. An ongoing eradication program using a combination of sex pheromone monitoring and mating disruption, irradiated sterile moth releases, genetically modified Bt cotton and local insecticide applications have all but exterminated the pink bollworm from the ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2009
Paulina Dabrowska Dalial Freitak Heiko Vogel David G Heckel Wilhelm Boland

Oxylipins play important roles in stress signaling in plants. The compound 12-oxophytodienoic acid (cis-OPDA) is an early biosynthetic precursor of jasmonic acid (JA), the key phytohormone orchestrating the plant anti-herbivore defense. When consumed by feeding Lepidopteran larvae, plant-derived cis-OPDA suffers rapid isomerization to iso-OPDA in the midgut and is excreted in the frass. Unlike ...

2014
Fang Ouyang Cang Hui Saiying Ge Xin-Yuan Men Zi-Hua Zhao Pei-Jian Shi Yong-Sheng Zhang Bai-Lian Li

Understanding drivers of population fluctuation, especially for agricultural pests, is central to the provision of agro-ecosystem services. Here, we examine the role of endogenous density dependence and exogenous factors of climate and human activity in regulating the 37-year population dynamics of an important agricultural insect pest, the cotton bollworm (Helicoverpa armigera), in North China...

2011
Jennifer L. Williams Christa Ellers-Kirk Robert G. Orth Aaron J. Gassmann Graham Head Bruce E. Tabashnik Yves Carrière

Fitness costs of resistance to Bacillus thuringiensis (Bt) crops occur in the absence of Bt toxins, when individuals with resistance alleles are less fit than individuals without resistance alleles. As costs of Bt resistance are common, refuges of non-Bt host plants can delay resistance not only by providing susceptible individuals to mate with resistant individuals, but also by selecting again...

2004
GUANG-YUN LI JING-JING LI WEI XIA HE-LI QU SHUAI YANG JIAN-PING ZHANG

Transgenic cotton is very effective in controlling targeted pests such as cotton bollworm (Helicoverpa armigera). However, increases in spider mite (Acari: Tetranychidae) populations have been reported in fields of transgenic cotton. The objectives of our laboratory experiments were (i) to determine host plant preference (transgenic or non-transgenic cotton) of T. turkestani females and (ii) to...

Journal: :Applied and environmental microbiology 2005
Robin V Gunning Ho T Dang Fred C Kemp Ian C Nicholson Graham D Moores

In Australia, the cotton bollworm, Helicoverpa armigera, has a long history of resistance to conventional insecticides. Transgenic cotton (expressing the Bacillus thuringiensis toxin Cry1Ac) has been grown for H. armigera control since 1996. It is demonstrated here that a population of Australian H. armigera has developed resistance to Cry1Ac toxin (275-fold). Some 70% of resistant H. armigera ...

Journal: :The Journal of Agriculture of the University of Puerto Rico 1969

2013
MURRAY ROBINSON

portrayed by some environmental groups as an enemy of our ecosystem. I am here today, as a representative of the agri-business industry, to address concerns of agricultural biotechnology and its impact on the environment, particularly the concerns surrounding the environmental impact of gene escape from transgenic plants to wild plants and the development of resistance by pests to genetically a...

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