What do the letters “VFN” associated with particular tomato varieties indicate?
VFN indicates the tomato variety is resistant to three types of diseases: Verticilum wilt, Fusarium wilt and nematodes. Many of the new hybrid varieties are VFN types. The lower foliage on my tomatoes is beginning to turn yellow and drop. The leaves have circular, dark brown to black spots. This is Alternaria leaf spot or early blight, a common problem on tomatoes and causes defoliation, usually during periods of high rainfall. Plant tomatoes on a raised bed to improve water drainage and spaced them enough so air can move and dry the foliage and prevent diseases. Follow a spray program using a fungicide beginning when the fruit is set and continuing at 1 week intervals during the growing season until harvest. My tomato fruits have small yellow specks on the surface. When the fruit are peeled, those yellow specks form a tough spot that must be cut off before eating the tomatoes. What’s wrong? The yellow speckling is caused by sucking insects such as stinkbugs or leaf-footed bugs. Early
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