Search Results for: Bumblebee
Costs of transgenic herbicide resistance introgressed from Brassica napus into weedy B. rapa
Abstract: Wild relatives of genetically engineered crops can acquire transgenic traits such as herbicide resistance via spontaneous crop–wild hybridization. In agricultural weeds, resistance to herbicides is often a beneficial trait, but little is known about possible costs that could affect the persistence of this trait when herbicides are not used. We tested for costs associated …
Bt transgenic maize pollen and the silent poisoning of the hive
Text: Maize or cotton pollen from Bt transgenic plants has been shown not to harm Coleopterans (ladybirds) and Hymenopterans(honeybees and bumblebees), even when they are exposed to large amounts of the anti-lepidopteran Bt maize or cotton pollen (Malone and Pham-Dèlègue, 2001; Hanley et al., 2003). Hanley et. al. (2003) suggested that the Bt pollen could …
Ignoring adjuvant toxicity falsifies the safety profile of commercial pesticides
Abstract: Commercial formulations of pesticides are invariably not single ingredients. Instead they are cocktails of chemicals, composed of a designated pesticidal “active principle” and “other ingredients,” with the latter collectively also known as “adjuvants.” These include surfactants, antifoaming agents, dyes, etc. Some adjuvants are added to influence the absorption and stability of the active principle …
Invertebrates and vegetation of field margins adjacent to crops subject to contrasting herbicide regimes in the Farm Scale Evaluations of genetically modified herbicide-tolerant crops
Abstract: The effects of management of genetically modified herbicide-tolerant (GMHT) crops on adjacent field margins were assessed for 59 maize, 66 beet and 67 spring oilseed rape sites. Fields were split into halves, one being sown with a GMHT crop and the other with the equivalent conventional non-GMHT crop. Margin vegetation was recorded in three …
Invertebrate responses to the management of genetically modified herbicide–tolerant and conventional spring crops. II. Within-field epigeal and aerial arthropods
Abstract: The effects of the management of genetically modified herbicide–tolerant (GMHT) crops on the abundances of aerial and epigeal arthropods were assessed in 66 beet, 68 maize and 67 spring oilseed rape sites as part of the Farm Scale Evaluations of GMHT crops. Most higher taxa were insensitive to differences between GMHT and conventional weed …