I have a (portulaca grandiflora) Moss Rose plant in a container kept in the Balcony. It is infested with this worm like insects. they are many. I tried spraying insecticide bought from nursery but they seem unaffected. Also They play dead or are very still most of the times, so its very difficult to spot them easily. Please help me find what this worm exactly is and what it’s called so that I can find out proper killer for these creatures. They have affected the plant badly and flowering is reduced remarkably. Buds are drying our before blooming. Please check the picture and help me identify this bug.