Sugarcane borers frequently inhabit wild and semi-cultivated grasses growing in the proximity of cane fields. In India, in view of the year-round cultivation of sugarcane, wild grasses are not necessary for the perpetuation of borer species, but observations indicate that certain borer species migrate from wild or other cultivated grasses to cane, thereby increasing levels of infestation in cane during certain seasons. Parasitism of borer species when present in cane is compared with that in wild or other cultivated grasses.Telenomus spp. amongst egg parasites andApanteles flavipes amongst larval parasites are striking examples of parasites which show preference for the same borer species when they occur on wild hosts than on cane, as indicated by the degrees of parasitism.