Refuge cropping strategies to delay the insect resistant against B.t

 B. t crop                     Non B.t crop

Global status of B.t crop cultivation
Globally 25.2 million hectares area is planted with B.t crops. U.S.A, Argentina, Australia, Brazil, Canada, Cile, China, Columbia, Egypt, Indonesia, Japan, Malasia, Mexico, Newsland, Banama, Paraguay, Philipines, Russia, Singapore, South Africa, South Korea, Uruguay, Thaiwan, Turkey, Bangaladesh and India are cultivating B.t crops