Extra seeds of cotton should be utilized for gap filling. The seedlings used for gap filling should be raised in polybags. Filling of gaps should be done during the rainy season. Thinning in cotton should be done within three weeks after planting. In thinning, excess seedlings of cotton should be removed by retaining 1 plant per hill. Don't forget to take detailed guidance on cotton crop from AgroStar's Agri Doctors today. Just give a missed call on toll free number 1800-120-3232 and the Agri Doctor will call you.