Corn Pests Showing Signs of Resistance to Bt Toxin VIP3Aa

Early warning of field-evolved resistance of the corn earworm and bollworm to Bt toxin VIP3Aa, the only Bt toxin in transgenic corn and cotton that remains effective against some populations of this pest in the U.S. […]

Bt Toxins in GE Plants Can Be Much Higher Than Previously Known

Monsanto data from 1990 reveal that Bt toxins expressed in GE plants can be up to 20 times more toxic than natural Bt toxins but this has thus far been ignored in risk assessments. […]

US EPA Proposes to Phase Out Almost All Bt Corn and Cotton Due to Insect Resistance

In an effort to stave off above-ground insect resistance, the US EPA has proposed phasing out many current Bt corn hybrids, as well as some Bt cotton varieties, in the next three to five years. […]

Pests Surviving Vip3A Toxin in Bt Corn and Bt Cotton in the US

Entomologists across the South of the USA are reporting increased feeding and survival of the corn earworm/cotton bollworm in Bt corn and cotton fields expressing the Vip3A protein, once believed to be the final Bt stronghold against the pest. […]

Efficacy of Bt Pyramided Crops in Question

Studies are showing that insect resistance development can occur with pyramided Bt crops, diminishing their efficacy. […]

Questionable Claims of Bt Efficacy Against the Fall Armyworm in Africa

Questions arise over claims made by the Water Efficient Maize for Africa Project that Bt maize is a solution to combat the fall armyworm pest. Instead, African governments are called to implement sustainable agroecological strategies to deal with the pest […]

Monsanto Puts Off Introduction of Second Generation Bt Soybean in the US

Monsanto has indefinitely cancelled its plans to introduce Intacta 2 Xtend, its second generation Bt soybean, in the U.S., most likely due to indications of insect resistance to the Bt proteins in the new product. […]

Pink Bollworm Resistance to Bt Cotton in India

Severe pink bollworm infestation has swept through the cotton-growing states of India due to evolved resistance to GM Bt cotton, which covers 90% of Indian cotton land. […]

Increasing Bollworm Resistance Found in Bt Cotton Belt of Texas

Cotton farmers across Texas are expected to face a growing bollworm problem this season with up to 40% crop losses reported last year due to increasing resistance of the bollworm to Bt cotton and Bt corn being grown in the southern states of the US. […]

Cases of Pest Resistance to Bt Crops Increased Five-fold From 2005-2016

A study analyzing global patterns of field-evolved resistance to Bt crops over the last two decades has found that the number of cases of pest resistance to Bt proteins increased from 3 in 2005 to 16 in 2016. […]