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This article was published originally on 1/13/1995Gardening catalogs have been arriving daily. As you browse through them this winter, you might notice that some of the plant descriptions contain information about disease resistance or tolerance. The use of resistant or tolerant varieties is an inexpensive and easy means of controlling plant diseases in crops where such varieties are available. Their use can also help cut down on the use of pesticides for disease control.
The term resistance or tolerance does not mean that the plant is completely immune to disease. It refers to a plant's ability to overcome to some degree the effect of the pathogen. Also, no variety is resistant or tolerant to all diseases. For instance, the initials VF by a tomato variety indicates resistance to the fungal diseases Verticillium wilt and Fusarium wilt, but does not mean that the variety is also resistant to the common leaf diseases.
If you have had a particular disease problem on a crop in the past, check to see if resistance to this disease is available. Many catalogs clearly list information on resistance or tolerance to specific diseases.
The following list gives some examples of host plants and diseases to which resistance or tolerance is available:
Year of Publication:
IC-470(1) -- January 13, 1995