Some species have turned from wild grasses to sugar cane .
This has affected the crop adversely , and in a few isolated cases , females have oviposited on food crops such as date palms , grape vines , citrus trees , asparagus and cotton .
Some species have turned from wild grasses to sugar cane , and this has affected the crop adversely , and in a few isolated cases , females have oviposited on food crops such as date palms , grape vines , citrus trees , asparagus and cotton .