Commercialized Product
Canola
Transgenes that have escaped from glyphosate-resistant canola can persist in the wild.
Conventional, certified canola seedlots were contaminated with genetically engineered seeds.
Herbicide-resistant canola volunteers were still detected after ten years of stringent control.
Fewer wild bees were observed in glyphosate-resistant canola fields.
Corn (Maize)
Bt maize has higher lignin content.
Monarch butterfly larvae exposed to anthers from Bt maize ate less and gained less weight.
Byproducts from Bt maize enter streams, and in feeding experiments affected stream insects.
The transgenic sequences of some Bt maize plants have changed since they were approved.
Western corn rootworm not killed by Bt corn in Iowa.
Perspective matters: Bias and conflict of interest in studies about genetically modified organisms
Cotton
Increased resistance to Bt toxin is found in some populations of cotton bollworm (Helicoverpa zea).
Fruiting morphology was altered when glyphosate-resistant cotton was sprayed with glyphosate.
Cotton plants and seeds expressing Bt toxin were found in non-Bt refuges.
Insect-resistant, transgenic cotton was more susceptible to fungal disease than its parent line.
Adoption of GM Cotton Slowing in West Africa Due to Concerns About Inferior Qualities of Crop
Soy
Diet containing glyphosate-resistant soybeans affected the nuclei of liver cells in mice.
Glyphosate-resistant soybeans had lower yields.
Glyphosate-resistant soybeans have altered root nodules when sprayed with glyphosate.
Transgenic DNA from glyphosate-resistant soybeans was detected in the intestinal flora of humans.
Sugarbeet
Glyphosate-resistant sugar beets became more susceptible to root rot when sprayed with glyphosate.
Commercialized Products in General
Food and feed contamination
Herbicide-resistant crops
Insect-resistant crops
Increasing resistance of pests to genetically modified, insect-resistant Bt crops