• The pink bollworm (Pectinophora gossypiella), is an insect known for being a pest in cotton farming.
• The adult is a small, thin, gray moth with fringed wings. The larva is a dull white, eight-legged caterpillar with conspicuous pink banding along its dorsum.
• The larva reaches one half inch in length.
• The pink bollworm is native to Asia, but has become an invasive species in most of the world’s cotton-growing regions.
• It reached the cotton belt in the southern United States by the 1920s.
• It is a major pest in the cotton fields of the southern California deserts.
• In parts of India, the pink bollworm is now resistant to first generation transgenic Bt cotton (Bollgard cotton) that expresses a single Bt gene (Cry1Ac).
• Monsanto has admitted that this variety is ineffective against the pink bollworm pest in parts of Gujarat, India.

Refer:

https://in.reuters.com/article/india-cotton-exports/india-cotton-exports-to-drop-as-pink-bollworms-eat-crop-idINKBN1DN0OW