Publications by authors named "Y Carriere"
Mismatch between lab-generated and field-evolved resistance to transgenic Bt crops in .
Proc Natl Acad Sci U S A
November 2024
Article Synopsis
- Transgenic crops that produce Cry proteins, derived from the bacterium Bt, are widely used to combat key crop pests like the noctuid moth, but resistance to these proteins, particularly Cry1Ac, has been developing in pest populations.
- A study investigated the genetic basis of this field-evolved resistance in moth populations from various locations in the southern U.S. and found extensive gene mixing among them.
- Unlike previous lab findings, the resistance was linked to an increase in a cluster of nine trypsin genes rather than specific mutations in known resistance genes, indicating that there may be multiple genetic factors at play in the development of resistance.
The cotton bollworm, Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae), is a significant cotton pest worldwide. Bacillus thuringiensis (Bt) cotton producing Cry1Ac has been used since 1997 for the control of this pest in China and a significant increase in H. armigera resistance to Cry1Ac has occurred in northern China.
View Article and Find Full Text PDFTransgenic crops producing Bacillus thuringiensis (Bt) toxins are commonly used for controlling insect pests. Nearby refuges of non-Bt host plants play a central role in delaying the evolution of resistance to Bt toxins by pests. Pervasive fitness costs associated with resistance, which entail lower fitness of resistant than susceptible individuals in refuges, can increase the ability of refuges to delay resistance.
View Article and Find Full Text PDFFall armyworm (FAW) is a global agricultural pest, causing substantial economic losses in corn and many other crops. Complicating efforts to control this pest is its capacity for long distance flights, which has been described in greatest detail for the central and eastern sections of the United States. FAW infestations are also routinely found in agricultural areas in southern Arizona, which lie beyond the western limits of the mapped migratory pathways.
View Article and Find Full Text PDFArticle Synopsis
- The fall armyworm is a major pest affecting over 350 plant species, including important crops like corn and cotton, creating challenges for agriculture.
- Control strategies primarily use transgenic crops with insecticidal proteins and synthetic insecticides.
- Recent studies on populations in southeastern China show that while resistance to these control methods exists, the populations are generally still susceptible to both Bt toxins and various insecticides.