The state of Karnataka, located in southwest India, is known for its silk. Mulberry trees grow in abundance, feeding silkworms and a centuries-old textile industry. But while silkworms prosper here, many people in the industry do not.The state of Karnataka, located in southwest India, is known for its silk. Mulberry trees grow in abundance, feeding silkworms and a centuries-old textile industry. But while silkworms prosper here, many people in the industry do not.