Thick, cream-coloured caterpillars tunnel inside squash stems, leaving holes and piles of sawdust-like frass near the base. Vines may suddenly wilt and collapse even when the soil is moist.

Creamy-white to pinkish caterpillars tunnel into stems and corn ears. Small holes and sawdust-like frass first sign.

Caterpillars feed inside the tip of the ear, chewing kernels and leaving behind holes, frass and damaged corn.