The damaging stage of mustard saw fly

The damaging stage of mustard sawfly is Grub and adult.
The grubs cause numerous shot holes and even riddled the entire leaves with voracious feeding. They devour the epidermis of the shoot, resulting in drying up of seedlings and failure to bear seeds in older plants.
Adults inflict damage by act of laying eggs with the help of their saw like ovipositor. Larvae nibble margins of tender leaves and later bite holes in the leaves.