1) Larva 2) Strawworm 1) Strawworm 
• (n.) The larva of a small, hymenopterous fly (Eurytoma hordei), which is found in gall-like swellings on the stalks of wheat, usually at or just above the first joint. In some parts of America it does great damage to the crop.
Joint'worm` noun (Zoology) The larva of a small, hymenopterous fly ( Eurytoma hordei ), which is found in gall-like swellings on the stalks of wheat, usually at or just above the first joint. In some parts of America it does great damage to the crop. 
noun larva of chalcid flies injurious to the straw of wheat and other grains
the larva of any of several chalcid flies of the family Eurytomidae, esp. of the genus Harmolita, that feeds within the stems of grasses, often causing a gall near the first joint. Also called