Implications of Burkina Faso’s Phase Out of Bt Cotton

An article discusses the reasons for the failure of Bt cotton in Burkina Faso and the implications for GE crop uptake by other African nations. […]

Broad-Spectrum Resistance to Bt Toxins in U.S. Western Corn Rootworm

New research has found broad-spectrum resistance to Bt toxins in the western corn rootworm pest in the US, raising concerns about the long-term durability of Bt crops for the management of insect pests. […]

Refuge-in-a-Bag Strategy for Bt Corn Increases Risk of Insect Resistance

A growing body of academic research shows that the practice of “refuge-in-a-bag” may actually increase the risk of Bt resistance in above-ground insect pests. […]

Bt Toxins Can Harm Non-target Organisms, With Stronger Combinatorial Effects

Bt toxins conferring insect resistance in GM plants can have adverse effects on non-target organisms in an aquatic ecosystem, whether singly on in combination with other Bt toxins, highlighting the importance of assessing combinatorial effects. […]

Fall Armyworm Resistance to Bt Maize in Brazil, but Sustainable Solutions Elusive

The fall armyworm has developed resistance to two Bt maize strains in Brazil. So-called solutions such as stacked-trait Bt crops and gene-silencing are however unlikely to provide a lasting solution to pest resistance. […]

The Impact of Secondary Pests on Bacillus thuringiensis (Bt) Crops

A study published this year in Plant Biotechnology Journal focuses on the development and impacts of secondary pests on Bt crops. Insecticide spraying to deal with this problem would undermine the whole rationale for the introduction of Bt crops which was […]

Bt Maize Brings Minimal Benefit to Smallholder Farmers in South Africa

This article finds that Bt maize in South Africa has minimally benefitted small farmers and recommends instead the development of cheaper non-GM stress-tolerant maize varieties better suited to small-farm agroecology to ensure improved food security. […]

Bt Crops with Multiple Toxins Not As Effective As Assumed

A meta-analysis to assess the potential of Bt crops pyramided with two or more toxins to delay pest resistance development has found that the pyramids are less effective than assumed and that cross-resistance often occurs. […]

Natural Refuges and Pyramiding Toxins: Flawed Solutions to Pest Resistance in Bt Cotton

This commentary argues that the strategy of using natural refuges and pyramided Bt toxins to delay insect pest resistance to Bt cotton is flawed. […]

Fall Armyworm Shows High Resistance to Bt Maize in the U.S.

A new study has produced compelling evidence of resistance of fall armyworm in southeastern U.S. to maize genetically modified to kill them, posing a serious threat to the long-term sustainability of the technology. […]