Planting refuge around Bt Cotton is mandatory as par Bt Protocol. Non Bt cotton is recommended as refugia in India. Helicoverpa Armigera, or the American bollworm, has other than cotton, a number of alternative host crops like chickpea, pigeonpea, tomato, sunflower, maize and sorghum, which can also be planted. Refuge crops must be planted in close proximity to the cotton plant.