The melon (or cotton) aphid, Aphis gossypii, is distributed throughout most of the world. It has been reported to feed on 220 different crops, including many important vegetables (tomatoes, potatoes, cucurbits) and ornamentals ...

Potato scab is a common tuber disease that occurs throughout the potato growing regions of the world. Although scab does not usually affect total yields, significant economic losses result from reduced marketability of the ...