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Showing 1 to 20 of 24 for “"B. thuringiensis"”.
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A comparison of sulfhydryl active compounds on activation and germination of Bacillus thuringensis spores
Spores of Bacillus thuringiensis HD-1 and Bacillus cereus 569 were incubated in various sulfhydryl active compounds in order to compare the effects of these compounds on activation and germination. The sulfhydryl active compounds used were oxidized lipoic acid and cystine (S-S), cysteine HCl and …
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Interrelationship of Bacillus thuringiensis Berliner to diamondback moth, Plutella xylostella L. (Lepidoptera: Plutellidaae), and its primary parasitoid, Diadegma insulare Cress (Hymenoptera: Ichneumonidae)
… its ability to develop resistance to Bacillus thuringiensis was evaluated. The field population of diamondback moths was found to be susceptible to B. thuringiensis. Selection pressure at 153 I.U. of B. thuringiensis endotoxin per ml for nine generations did not cause any significant difference …
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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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Development of techniques for the recovery and enumeration of two mosquito pathogens
… pathogens Bacillus sphaericus 1593 and B. thuringiensis serovar. israelensis were developed. Streptomycin at 100 µg/ml and 500 µg/ml in NY agar (nutrient agar with 0.05% yeast extract) successfully selected for B. sphaericus, and allowed counts equivalent to those obtained on the nutrient …
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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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Efecto de formulaciones comerciales de bacillus thuringiensis sobre el desarrollo de la roya del cafeto causada por hemileia vastatrix Berk y Br
… Berk. & Br. Se evaluó el efecto de Bacillus thuringiensis como inhibidor del desarrollo el hongo H. vastatrix. El estudio se realizó en el invernadero del Centro Experimental del Café el Norte- UNICAFE, Matagalpa. Las plantas de café fueron asperjadas con dos productos comerciales a base de …
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The ecology of Bacillus thuringiensis on the phylloplane
… 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. This was …
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Investigation of bacteria associated with Australian wine grapes using cultural and molecular methods
… and correlated with application of Bacillus thuringiensis as a biological pesticide. B. thuringiensis was the most prevalent bacterial species on wine grapes throughout cultivation, as determined by plate culture, enrichment culture and PCR-DGGE. B. thuringiensis carried over into wine …
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A comparison of the pathological effects on the midgut of the European corn borer treated with Bacillus thuringiensis and Bacillus subtilis
… species, Bacillus subtilis and Bacillus thuringiensis, in European corn borer larvae. The study consisted of: (1) a determination of the mortality of larvae that had ingested various concentrations of bacterial spores; (2) light microscopic examination of midgut tissues of larvae treated …
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Impact of the microbial pesticide Bacillus thruingiensis Berliner subsp. kurstaki on Hymenopterous parasites of the imported cabbageworm, Pieris rapae (L.) (Lepidoptera: Pieridae)
Three formulations of Bacillus thuringiensis Berliner subsp. kurstaki (Dipel 4L, Dipel 2X, and ABG-6167) were compared with the synthetic pyrethroid perrnethrin ( common name Pounce 3. 2 EC) for insecticidal activity and impact upon parasitism of the imported cabbageworrn, Pieris rapae (L.) …
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Spore-forming bacteria as pharmaceutical factories
… Bacillus species, in the main B. subtilis and B. thuringiensis, have been engineered to produce, for the first time, fragments of a humanized monoclonal antibody: kindly provided by Medimmune. It is possible to produce antibodies inside the spore core. This work proposes for the first time that …
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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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Evaluación de productos botánicos y biológicos para el control de plagas defoliadoras en el cultivo del repollo (Brassica oleracea) híbrido Izalco
… seguido por los tratamientos javelin (B. thuringiensis) y júpiter (Chlorfluasuron) que lograron mantener las poblaciones bajas, no así los tratamientos Dipel comercial, BT. Nacional y Extracto Acuoso de Semilla de Mamey los que mantuvieron poblaciones similares a las presentadas por el …
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The anthelmintic effect of Bacillus thuringiensis Cry5B on Haemonchus contortus in sheep
… 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 that Cry5B …
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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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Random amplified polymorphic DNA (RAPD) analysis of Bacillus sphaericus
… (unlike the toxin diversity found within B. thuringiensis serotypes). These results together with DNA homology data support the establishment of a new species for the pathogenic strains.
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Matrix-assisted laser desorption/ionization mass spectrometry for the analysis of collected bioaerosols
… were identified for <I>E. coli</I>,8 for <I>B. Thuringiensis</I>, and 6 for <I>B. subtilis</I>. Subsequently, cytochrome <I>c</I> and <I>E. coli</I> samples were proteolyzed <I>in situ</I> using trypsin and CNBr. The digestions were done using removable mini-wells. The mini-wells were placed on …
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Nuove conoscenze sull'attività antibatterica dei sali emulsionanti utilizzati nei formaggi fusi: dall'applicazione in vitro a quella in situ.
… selezionati due ceppi target quali, Bacillus thuringiensis CFBP 3476 e Clostridium perfringens ATCC 13124, che sono stati inoculati nei campioni sperimentali. In dettaglio, campioni di FF, prodotti su scala di laboratorio e su scala pilota, sono stati inoculati e analizzati fino a 45 giorni di …
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Microbial CR(VI) reduction in indigenous culture of bacteria: characterization and modelling
… of Bacillus sp., i.e. B. cereus, B. thuringiensis and B. mycoides. Batch experiments under both aerobic and anaerobic conditions showed a high Cr(VI) reducing performance under relatively high initial Cr(VI) concentrations. The reduction rate using this culture was 3 to 8 times higher …
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Research in Biological Control of the Formosan Subterranean Termite
… 10% of the entomopathogenic bacterium, Bacillus thuringiensis subspecies israelensis, was tested. No-choice and choice bioassays did not show a promising lethal effect of MosquitoDunks® on termites. Furthermore it was shown that C. formosanus can suppress the growth of B. thuringiensis. Also, …
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