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Showing 1 to 20 of 89 for “"Bacillus thuringiensis"”.
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Image analysis of Bacillus thuringiensis
… to quantify the morphology of the bacterium Bacillus thuringiensis, and to automatically count the bacteria. The need to quantify the bacterial morphology arose out of the possibility of controlling a fermentation based on the morphology of the observed bacteria. Automatic counting of …
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The ecology of Bacillus thuringiensis on the phylloplane
… which specifically allow the cultivation of Bacillus thuringiensis while it is in the vegetative as opposed to the spore form were developed. Using these media it was conclusively proved for the first time that B. thuringiensis can reside on the phylloplane in a metabolically active form. …
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Characterization of the insecticidal crystal protein from Bacillus thuringiensis.
Bacillus thuringiensis produces a crystalline inclusion body composed of a 130-kDa protein which is rendered toxic upon ingestion by lepidoteran larvae. It was shown that proteinases adsorb on the surface of the crystalline body lead to proteolysis of the protein crystal especially on …
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Evolution of Bacillus thuringiensis Maize Yields in South Africa
… of Busseola fusca developing resistance to Bacillus thuringiensis (Bt) maize in South Africa in 2006. This study uses empirical data to estimate the potential impact of insect resistance on yields and estimates the economic and food availability impacts of genetic deterioration of Bt maize. …
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Production, purification and properties of Bacillus thuringiensis neutral protease
Although the insect pathogenicity of Bacillus thuringiensis is reasonably well understood, relatively little is known about other facets of this microorganism's physiology. At the time of sporulation, the organism produces in addition to the spore and toxic paraspore (crystal) an extracellular …
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Molecular and phylogenetic analysis of a Bacillus thuringiensis genetic locus
The diptericidal $\textit{Bacillus thuringiensis}$ (Bt) ssp. $\textit{fukuokaensis}$ strains 84-I and 17A were investigated for the presence of novel Cry proteins. N-terminal amino acid, immunological and PCR analysis indicated that both strains contain a novel set of $\delta$-endotoxins. …
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The anthelmintic effect of Bacillus thuringiensis Cry5B on Haemonchus contortus in sheep
… to commercial anthelmintics. The bacterium Bacillus thuringiensis (Bt) can produce crystal proteins during sporulation, which can be lethal to insects in multiple orders when ingested. One protein, Cry5B, has demonstrated effectiveness against multiple parasitic nematodes. We hypothesized …
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Fitness Costs of Resistance to Bacillus thuringiensis in the Pink Bollworm Pectinophora gossypiella
Resistance to Bacillus thuringiensis (Bt) cotton, Gossypium hirsutum, is associated with fitness costs in pink bollworm, Pectinophora gossypiella. Previous work has demonstrated that costs of resistance are induced by environmental factors including insecticidal cotton phytochemicals such as …
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A NEW STRATEGY FOR MOSQUITO BIOCONTROL BASED ON THE IMPROVEMENT OF BACILLUS THURINGIENSIS EFFECTIVENESS
… mosquito larvae are based on the entomopathogens Bacillus thuringiensis var. israelensis (Bti) and Lysinibacillus sphaericus (Lsph). These products, active by ingestion, include Bti alone or in combination with Lsph and are safe for the environment while displaying a high and specific toxicity …
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FATE, TRANSPORT, AND MIXTURE TOXICITY OF TRANSGENIC BACILLUS THURINGIENSIS CORN (ZEA MAYS) AND ASSOCIATED INSECTICIDES
… material from another species, a soil bacterium, Bacillus thuringiensis Berliner (Bt corn), in order to produce proteins that are toxic to some insect pests. Additional insecticides that are commonly used to protect corn include a neonicotinoid seed coating, clothianidin, and a pyrethroid …
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Screening For Cry Genes From Bacillus Thuringiensis In Various Textural Classes Of Southwest Missouri Soils
Bacillus thuringiensis is a gram-positive endospore-forming bacterium that produces an insecticidal δ-endotoxin during sporulation. The δ-endotoxin consists of an inactive protein toxin crystal (protoxin) that becomes activated by the alkaline conditions in the intestinal lumen of specific insect …
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To study the fitness of Bacillus thuringiensis to survive in natural and artificial, terrestrial ecosystems
… the Multi Locus sequence typing (MLST) of the B. thuringiensis strains isolated from the phylloplane of the clover leaf. A clonal population structure was indicated, although greater variation in sequence types (STs) was discovered in previous collections of B. cereus/B. thuringiensis. The three …
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Campoletis flavicincta (Hym., Ichneumonidae) : ocorrência, criação e interação com Spodoptera frugiperda (Lep., Noctuidae) e Bacillus thuringiensis aizawai
… interação entre C. flavicincta/S. frugiperda/B. thuringiensis aizawai, em laboratório, foram avaliados A partir de análise do consumo alimentar de folhas de milho, observou-se que lagartas parasitadas e infectadas apresentaram um menor consumo, apesar do mesmo não ter diferido daquele de lagartas …
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Aktivierung und Inaktivierung des Cry8C-Toxins von Bacillus thuringiensis japonensis Stamm Buibui im Darmsystem von Engerlingen (Scarabaeidae)
Bacillus thuringiensis japonensis Stamm Buibui (BTJ) zeigt Melolontha melolontha eine geringe Wirkung, während Anomala-Arten und Popillia japonica empfindlich sind. Zur Identifizierung der Ursachen für die unterschiedliche Wirksamkeit, wurde die Darmphysiologie der Larven von P. japonica und M. …
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Exposure of honeybees (Apis mellifera L.) and other hymenoptera pollinators to different Bacillus thuringiensis based biopesticides in laboratory controlled trials
… microrganismi utilizzati a tal proposito è Bacillus thuringiensis (Bt) B., presente in alcuni prodotti che vengono dispersi nell’ambiente e utilizzati nell IPM. L’azione tossica del batterio è dovuta alla produzione di cristalli parasporali ad azione insetticida che avviene durante la fase …
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