Plants may be resistant to one disease or pest but not another. The label may specify. For example, hybrid tomato plant labels have codes that indicate disease resistance: V for verticillium wilt, F for fusarium wilt, T for tobacco mosaic virus, A for Alternaria leaf spot, N for nematodes, St for gray leaf spot. A tomato cultivar, or cultivated variety, labeled VFN is resistant to some of these problems, but not all.
