Permits to plant large extensions of genetically modified corn for the first time in Mexico are likely to be approved before the end of the year, said a company lobby group on Monday. Monsanto, DuPont’s Pioneer seed unit and Dow Chemical’s agricultural arm have all applied to expand on tiny experimental plots of GM corn in northern Mexico, said AgroBIO, an organization that represents the biotech companies. The group expects the government will approve more sizable pilot plots for the corn-growing state of Sinaloa by the end of October and in Tamaulipas by November with other states following soon after.