How to kill this insects which do occur in cotton crops

Hi Nandkishor Teke It looks like Oxidus gracilis which is also known as short flange millipede. Usually they feed on decomposed plant material when they are less in number. But It is possible for millipedes to damage your garden area/crop if they become too populous. Although they generally feed on decomposing organic material, millipedes can turn to plant matter including leaves, stems and roots. And although they do not bite, they can secrete a fluid that can irritate the skin and can cause an allergic reaction in some people. If you have an overabundance of millipedes in the garden, remove anything where moisture can collect. If you keep the area as dry as possible, their numbers should decrease. There are also several types of garden baits that contain carbaryl, which is often used to control millipedes that have gotten out of control in the garden. Only resort to pesticides when absolutely necessary, however. Thanks for using plantix community 🙂🙂

Thanks Fuzail for the info.

You're welcome Sreekanth M sir 🙂 🙂🙂

Best organic solution for this worm metarrhizium