Thank you Das but it does not look like a guava moth based on a google search. I know the photo is not the best.
They don't actually eat the leaf but I suspect they suck the juice out of them. If I don't control them the tree declines.
They are very soft bodied and has a white powdery coating on the outside. If you slide your finger on top of them without any pressure they just smear.
Also, I have not seen them move.