Late blight, a highly destructive plant disease, has been reported in areas of southern and central Alberta in a number of commercial potato fields, market gardens and many urban residential plantings of potatoes and tomatoes. It is being contained in commercial potato fields with fungicidal sprays. However, with late identification and limited control options for home gardeners, the disease has been largely unchecked in residential locations. There is the potential for continued spread of the disease, due to air-borne spores that are being produced on infected plants. There is a risk of introduction into greenhouse tomato operations.
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