 In some cases, companies have taken to testing for pesticide residual of fiber or fabric themselves to assure cheating does not occur on the part of the farmers or farm coops.. Use of insecticides, herbicides, fertilizers, and water have all declined in conventional systems as a direct result of the widespread adoption of genetically modified cotton, which currently accounts for over 95% of cotton grown in the U.S., India and China.Organic certification prohibits use of genetically modified (GM) varieties, and organic growers are unable to benefit from the lower environmental impacts (e.g., reduced pesticide and water use and increased yield of GM cotton.Organic cotton is only 1-2% of global cotton production, and is currently being grown in many countries.