Results 41 to 50 of about 366 (115)
Structural and functional role of Domain I for the insecticidal activity of the Vip3Aa protein from Bacillus thuringiensis. [PDF]
Microb Biotechnol, 2022 To better understand the relevance of the major change in Domain I of Vip3 proteins in the transition from protoxin to activated toxin for the insecticidal activity, we have generated several Vip3Aa mutants aimed to alter the activity and remodelling capacity of this central region to understand its function.
Lázaro-Berenguer M +6 more
europepmc +2 more sources
Bacillus thuringiensis Vip3Aa Toxin Resistance in Heliothis virescens (Lepidoptera: Noctuidae) [PDF]
Applied and Environmental Microbiology, 2017 ABSTRACT Laboratory selection with Vip3Aa of a field-derived population of Heliothis virescens produced >2,040-fold resistance in 12 generations of selection. The Vip3Aa-selected (Vip-Sel)-resistant population showed little cross-resistance to Cry1Ab and no cross-resistance to Cry1Ac.
Brian R, Pickett +3 more
openaire +2 more sources
New Zealand Journal of Agricultural Research, Volume 66, Issue 6, Page 519-619, December 2023., 2023 ABSTRACT Food and feed has been produced from genetically modified (GM) crops for 25 years. It is timely to review whether this technology has globally delivered the expected benefits and whether the ongoing debate on risks is justified. Expected benefits associated with GM include increased crop yields, reduced pesticide and insecticide use, reduced ...
John R. Caradus
wiley +1 more source
Pest Management Science, Volume 79, Issue 10, Page 3493-3503, October 2023., 2023 We found a significant difference in pupal mortality and weight among treatments in seed blends with Vip3A, implying that cross‐pollination occurred between Bacillus thuringiensis (Bt) and non‐Bt maize ears. There was no treatment effect for pupation depth, adult flight distance, and eclosion time.
Daniela T Pezzini +6 more
wiley +1 more source
Toxins, 2021 Laboratory selection for resistance of field populations is a well-known and useful tool to understand the potential of insect populations to evolve resistance to insecticides.
Yudong Quan +5 more
doaj +1 more source
Downregulation of a transcription factor associated with resistance to Bt toxin Vip3Aa in the invasive fall armyworm. [PDF]
Proc Natl Acad Sci U S A, 2023 Transgenic crops producing insecticidal proteins from Bacillus thuringiensis (Bt) have revolutionized control of some major pests. However, more than 25 cases of field-evolved practical resistance have reduced the efficacy of transgenic crops producing crystalline (Cry) Bt proteins, spurring adoption of alternatives
Jin M +9 more
europepmc +4 more sources
EFSA Journal, Volume 21, Issue 6, June 2023., 2023 Abstract Genetically modified cotton COT102 was developed to confer resistance against several lepidopteran species. The molecular characterisation data and bioinformatic analyses do not identify issues requiring food/feed safety assessment. None of the differences in the agronomic‐phenotypic and compositional characteristics between cotton COT102 and ...
EFSA Panel on Genetically Modified Organisms (GMO) +29 more
wiley +1 more source
Reduced toxin binding associated with resistance to Vip3Aa in the corn earworm (Helicoverpa zea). [PDF]
Appl Environ Microbiol, 2023 ABSTRACT Transgenic corn and cotton that express Cry and Vip insecticidal proteins from the bacterium, Bacillus thuringiensis (Bt), have been valuable tools for the management of lepidopteran pests. In 2019, a Vip3Aa-resistant strain of Helicoverpa zea (CEW-Vip-RR) was isolated from
Kerns DD +4 more
europepmc +3 more sources
Evolutionary Applications, Volume 16, Issue 3, Page 705-720, March 2023., 2023 Abstract Passage experiments that sequentially infect hosts with parasites have long been used to manipulate virulence. However, for many invertebrate pathogens, passage has been applied naively without a full theoretical understanding of how best to select for increased virulence and this has led to very mixed results.
Tatiana Dimitriu +5 more
wiley +1 more source
EFSA Journal, Volume 20, Issue 9, September 2022., 2022 Abstract Following the submission of application EFSA‐GMO‐RX‐025 under Regulation (EC) No 1829/2003 from Syngenta Crop Protection NV/SA, the Panel on Genetically Modified Organisms of the European Food Safety Authority was asked to deliver a scientific risk assessment on the data submitted in the context of the renewal of authorisation application for ...
EFSA Panel on Genetically Modified Organisms (GMO) +23 more
wiley +1 more source