No matter the type of blight your tomato, or Solanum lycopersicum, plants may be battling, it is not a pretty sight. With careful planning and selection, it is possible to steer clear of the blight that so often plagues this popular summer fruit. Before arming yourself with a plan to avoid blight, you should know what you're up against. There are two forms of blight that cause problems for tomatoes, early blight and late blight.
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According to the University of Maine Extension, early blight can present a problem at any phase during tomato development. The most common symptoms of early blight include circular lesions on the fruit, fruit rot, collar rot low on the plant and stem cankers, which are sunken or missing areas on the plant's stem.
Late blight is most commonly detected by lesions on the leaf and stem. Ripe tomatoes are also subject to late blight and develop dark, circular lesions on the fruit as a result.
Early Blight-Resistant Tomatoes
According to Cornell University Extension, several tomato varieties are resistant to early blight. "Juliet" is a sweet plum tomato is lauded for its taste, ability to withstand cracking and resistance to both early and late blight. "Matt's Wild" cherry tomatoes pack a big taste in their small fruit. However, these tomatoes tend not to grow well and produce soft fruit. Unlike with "Matt's Wild," gardeners can count on a good production with "Old Brooks" tomatoes. They grow to a 6- to 227gr. with tangy, full flavour. "Tommy Toe," "Cabernet" and "Manalucie FST" are also noted for their resistance to early blight.
Late Blight-Resistant Tomatoes
Gardeners find that good things grow in small packages with the "Golden Sweet" variety. This grape tomato produces a mild, sweet tomato with yellow fruit and is resistant to late blight, according to Cornell University Extension. The medium size of the "Legend" tomato makes it good for slicing. The fruit also bears few seeds. Two varieties, "Old Brooks" and "Juliet," are resistant to both late and early blight, notes Cornell University Extension.
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