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Engineering of Bacillus thuringiensis Cry2Ab toxin for improved insecticidal activity
Bacillus thuringiensis Cry2Ab toxin was a widely used bioinsecticide to control lepidopteran pests all over the world. In the present study,...
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The evaluation of resistance risk to Cry2Ab and cross-resistance to other insecticides in Helicoverpa armigera
To delay the resistance of pests to Bt cotton producing Cry1Ac, pyramided cotton has been planted to replace Cry1Ac-cotton. However, the resistance...
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Frequency of Cry1Ac and Cry2Ab resistance alleles in pink bollworm, Pectinophora gossypiella Saunders from Andhra Pradesh, India
Since 2002, transgenic crops that produce Cry1Ac and Cry2Ab toxins have been used in India to control bollworms. From 2002 to 2009, Bt-cotton...
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Response of pink bollworm Pectinophora gossypiella (Saunders) to Cry1Ac and Cry2Ab toxin
BackgroundDuring field surveillance in Gujarat, India, in 2009, scientists found that pink bollworm was surviving in the first generation of Bollgard...
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Key residues of Bacillus thuringiensis Cry2Ab for oligomerization and pore-formation activity
As a pore-forming toxin, activation, oligomerization and pore-formation were both required for the mode of action of Cry toxins. Previous results...
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Bt cotton producing Cry1Ac and Cry2Ab does not harm the parasitoid Aenasius arizonensis (Girault): a host-mediated tritrophic assay
Transgenic crops with genes from Bacillus thuringiensis ( Bt ) Berliner, a soil bacterium producing δ-endotoxin that is lethal to several phytophagous...
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Cry toxin expression in different plant parts of Bt cotton at different phenological stages
BackgroundCompared to Bollgard-I, the utilization of Cry2Ab protein in Bollgard-II cotton cultivars enhances insect control. Field and laboratory...
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Baseline susceptibility of cabbage butterfly, Pieris brassicae (Linnaeus) (Lepidoptera: Pieridae) to Bacillus thuringiensis (Berliner) Cry toxins in Meghalaya
BackgroundCabbage butterfly, Pieris brassicae (Linnaeus) (Lepidoptera: Pieridae), is one of the most important pests of cabbage and other...
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First report of peculiar damaging behaviour of fall armyworm Spodoptera frugiperda (J E Smith) on the pre-blooming stage of cotton in India
Spodoptera frugiperda , fall armyworm (FAW), is one of the notorious insect-pest that has invaded a large number of countries in a short span of time...
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Development of transgenic cotton (Narasimha) using triple gene Cry2Ab-Cry1F-Cry1Ac construct conferring resistance to lepidopteran pest
High-yielding Indian cotton varieties are not amenable for regeneration and transformation because they are recalcitrant in nature. In this work, we...
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Insecticidal activity of Bacillus thuringiensis strains isolated from tropical greenhouses towards Cydia pomonella and Spodoptera exigua larvae
Three Bacillus thuringiensis strains were isolated from a specific habitat of tropical greenhouses located in the Botanical Garden of Adam Mickiewicz...
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Pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) survival on transgenic cotton in India
BackgroundInsecticidal proteins from the Bacillus thuringiensis ( Bt ) marks the genetically modified cotton crop that was commercialized in India in...
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Molecular profiling of resistance alleles in Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) collected from different locations
BackgroundAfter the commercialization of insect-resistant transgenic Bt cotton Bollgard I & II, India ranks first in the world in cotton production....
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Bt cotton seed purity in Burkina Faso: status and lessons learnt
BackgroundSince the commercial release of Bt cotton in Burkina Faso in 2009, the issue of seed purity in producers’ fields has rarely been addressed...
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Host Plant Resistance to Insects in Cotton
Across the globe, cotton production is limited by endemic and introduced insect pests. The incorporation of host plant resistance (HPR), defined as...
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Impact of Bt cotton expressing single (Cry1Ac) and dual toxins (Cry1Ac and Cry2Ab) on the fitness of the predator Chrysoperla zastrowi sillemi (Esben-Petersen): prey-mediated tri-trophic analysis
Transgenic Bt cotton with genes from soil inhabiting spore forming bacterium Bacillus thuringiensis Berliner produces δ-endotoxin for the control of...
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Susceptibility of Helicoverpa armigera to two Bt toxins, Cry1Ac and Cry2Ab, in northwestern China: toward develo** an IRM strategy
Extensive unofficial planting of Bt cotton expressing Cry1Ac toxin has occured for the past two decades in northwestern China, and no mandatory...
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Biological control of Spodoptera frugiperda (Nixon) (Lepidoptera: Noctuidae) in new invaded countries using insect pathogens
BackgroundThe fall armyworm (FAW), Spodoptera frugiperda (J.E. Nixon) (Lepidoptera: Noctuidae), is the major insect pest that infests cereal crops...
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Draft genome of neotropical Bacillus thuringiensis UFT038 and its potential against lepidopteran soybean pests
Bacillus thuringiensis ( Bt ) is known for its Cry and Vip3A pesticidal proteins with high selectivity to target pests. Here, we assessed the potential...
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Distribution and Genetic Diversity of Genes from Brazilian Bacillus thuringiensis Strains Toxic to Agricultural Insect Pests Revealed by Real-Time PCR
Bacillus thuringiensis is a Gram-positive aerobic bacterium and the most used biopesticide worldwide. Given the importance of B. thuringiensis strain...
