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Cotton is cultivated in nearly 12.35 million hectares in India (AICRP on Cotton, 2018), which is among the highest for any country. However, the productivity of cotton in India is low, which can be increased through improved plant protection, because insect pests alone reduce productivity by 50 to 60% (Sundaram et al., 1999). The devastations caused by the pink bollworm, Pectinophora gossypiella (Saunders) to Bt cotton crops in Gujarat and southern Deccan Plateau since 2015-16, suggest that yields from transgenic plants are below the potential. Recent trends show pink bollworm (PBW) as the greatest threat to Bt-cotton with repeated widespread attacks. Kranthi (2015) reported that PBW has developed resistance to both Cry1Ac and Cry2Ab endotoxin genes.

Field Incidence of the Pink Bollworm on Bt Cotton in Raichur region of Karnataka