 Field trials conducted by the UK biotechnology company Oxitec, released between 1,000 and 2,500 genetically modified males to a crop in New York state, during August and September 2017 on six occasions.When the male GM moths mated with wild females all the resulting female larvae died.Following pupation of the male larvae, the moths passed on their lethal gene to their offspring, with about half of GM males dying in each generation, resulting in the gene disappearing in a few years and not persisting in the wild.