Close up of an ear of corn. Maize is the most important and widely grown crop in Europe. The Benbrook report forecasts massive increases in the use of glyphosate and other herbicides if herbicide-tolerant, genetically-engineered (HTGE) maize is authorised in the EU. Glyphosate usage could increase up to 1000% while the maximum decrease of other herbicides will be as little as 25%.