Potato moth, Phthorimaea operculella, is the most destructive pest of potatoes in New South Wales. It is also a serious pest of tomatoes, tobacco and eggplant and infests weeds of the potato family, such as blackberry nightshade, Solanum nigrum, common thornapple, Datura stramonium, and apple of Peru, Nicandra physalodes. The larvae mine in foliage, stems and fruits and in the tubers of potatoes. Potato moth is widespread in New South Wales and is particularly damaging in warm dry weather.