نتایج جستجو برای: bacillus thuringiensis
تعداد نتایج: 56351 فیلتر نتایج به سال:
Onfarm field trials carried out with Bacillus thuringiensis (Bt) cotton in different states of India show that the technology substantially reduces pest damage and increases yields. The yield gains are much higher than what has been reported for other countries where genetically modified crops were used mostly to replace and enhance chemical pest control. In many developing countries, small-sca...
Propylea japonica (Thunberg) (Coleoptera: Coccinellidae) is a prevalent pollen consumer in corn fields and is therefore exposed to insecticidal proteins contained in the pollen of insect-resistant transgenic corn cultivars expressing Cry proteins derived from Bacillus thuringiensis (Bt). In the present study, the potential effect of Cry1Ab/2Aj- or Cry1Ac-containing transgenic Bt corn pollen on ...
Genomic and transcriptomic insights into the efficient entomopathogenicity of Bacillus thuringiensis
Bacillus thuringiensis has been globally used as a microbial pesticide for over 70 years. However, information regarding its various adaptions and virulence factors and their roles in the entomopathogenic process remains limited. In this work, we present the complete genomes of two industrially patented Bacillus thuringiensis strains (HD-1 and YBT-1520). A comparative genomic analysis showed a ...
Spores and parasporal crystals of Bacillus thuringiensis can be separated at moderate centrifugation speeds (10,000 to 12,000 rpm) in gradients of Renografin or sodium diatrizoate.
The “High Dose/Refuge” strategy (HD/R) is the currently recommended Insect Resistance Management strategy (IRM) to limit resistance development to Bacillus thuringiensis (Bt) plants. This strategy requires planting a “refuge zone” composed of non-Bt plants suitable for the target insect and in close proximity to a “Bt zone” expressing a high toxin concentrat...
Susceptibility to Cry1Ab toxin from Bacillus thuringiensis (Bt) was determined for 12 field populations of neonate corn earworm, Helicoverpa zea (Boddie), from the United States. Earworm larvae were exposed to artificial diet treated with increasing Bt concentrations, and mortality and growth inhibition were evaluated after 7 d. The range of variation in Bt susceptibility indicated by growth in...
چکیده شب پره پشت الماسی (diamondback moth) یا بیدکلم، plutella xylostella (l.) (lepidoptera: plutellidae) یکی از مهمترین آفات گیاهان خانواده چلیپائیان در سراسر دنیا می باشد. این حشره در سالهای اخیر آفتی مخرب برای کلم کاری های استان تهران بوده است. در بین بالپولکداران، این شب پره بالاترین مقاومت را به آفتکش های شیمیایی نشان داده است. بنا به نظر بسیاری از محققین، برای از بین بردن مشکل مقاومت این...
باکتری bacillus thuringiensis (b.) بهعنوان یک عامل بیولوژیک در مبارزه با آفات هدف کاربرد عملی پیدا کرده، ولی تأثیر عوامل جوی و تابش مستقیم اشعه خورشید قدرت تأثیر و بقای آن را در طبیعت کاهش میدهد. در این پژوهش نقش حفاظتی زغال فعال و نشاسته در دوام بیماری زایی این باکتری روی لاروهای سن دوم برگ خوار درختان زبان گنجشک (nyssia graecarius staudinger) برای اولین بار در ایران مورد بررسی قرار گرفت. بد...
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