Experimental cross-pollination between transgenic herbicide-resistant
canola and wild field mustard led to highly fertile, herbicide-resistant
wild field mustard.
Transgenes that have escaped from glyphosate-resistant canola can persist
in the wild.
Conventional, certified canola seedlots were contaminated with genetically
Herbicide-resistant canola volunteers were still detected after ten years
of stringent control.
Fewer wild bees were observed in glyphosate-resistant canola fields.
Bt cotton showed decreased ability to kill cotton bollworm larvae
during flower development and flowering.
Bt cotton had altered protein metabolism and produced less
insecticidal toxin in leaves when subjected to high temperatures during
Increased resistance to Bt toxin is found in some populations of
cotton bollworm (Helicoverpa zea).
Glyphosate-resistant cotton that is sprayed with glyphosate showed abnormal
Fruiting morphology was altered when glyphosate-resistant cotton was
sprayed with glyphosate.
Cotton plants and seeds expressing Bt toxin were found in non-Bt
Insect-resistant, transgenic cotton was more susceptible to fungal disease
than its parent line.
Bt maize has higher lignin content.
Atlantic salmon fed Bt corn had altered enzyme activity in liver
and intestine as well as altered proportions and numbers of different
white blood cells.
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.
Bt maize varieties matured more slowly and had on average lower
grain yield and higher grain moisture content than conventional
Bt maize had changed lipid composition in stems; also, lipid
composition in soil was altered, and soil respiration was reduced.
Western corn rootworms were found feeding on volunteer corn plants
expressing a Bt toxin specific to that pest.
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
Glyphosate-resistant GM soybeans differ compositionally from non-GM
soybeans and contain high residues of the herbicide glyphosate.
Herbicide-resistant soybean plants were shorter, with less chlorophyll,
lower weight, and increased susceptibility to stem-splitting at high
Diet containing glyphosate-resistant soybeans affected the nuclei of liver
cells in mice.
Glyphosate-resistant soybeans had lower yields.
Root colonization of glyphosate-resistant soybeans by pathogenic
Fusarium fungi increased with glyphosate application.
Glyphosate-resistant soybeans have altered root nodules when sprayed with
Transgenic DNA from glyphosate-resistant soybeans was detected in the
intestinal flora of humans.
Glyphosate-resistant sugar beet production alters population densities of
some arthropods, significantly reducing the number of bees and butterflies
in beet fields.
Glyphosate-resistant sugar beets became more susceptible to root rot when
sprayed with glyphosate.
Commercialized Products in General
Food and feed contamination
International shipments of food and feed are increasingly contaminated
with genetically modified (GM) products.
Increased planting of glyphosate-resistant crops and application of
glyphosate causes increase in glyphosate-resistant weed species.
Increasing resistance of pests to genetically modified, insect-resistant