The introduction of glyphosate-tolerant (GT) crops is expected to mitigate the environmental contamination by herbicides because glyphosate is less persistent and toxic than the herbicides used on non-GT crops. Here, we compared the environmental balances of herbicide applications for both crop types in three French field trials. The dynamic of herbicides and their metabolites in soil, groundwa...

In two glasshouse experiments, relations between sugarbeet root dry weight (y, expressed as a percentage of the maximum dry root weight), and preplanting populations of Heterodera schachtii (P(i)) were described by the equation y = 100(Z)(P(i)-T), in which Z = a constant slightly smaller than 1, and T = the tolerance limit (the value of P(i) below which damage was not measureable). T varied wit...