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1. #Late blight in tomatoes skin#
2. #Late blight in tomatoes portable#
3. #Late blight in tomatoes professional#
4. #Late blight in tomatoes free#

Culled (discarded) potatoes should be bagged, buried, composted, or otherwise disposed of if they are allowed to sprout they will be a source of disease. Inspect the seed prior to planting and discard any tubers that appear to be infected. Purchase seed potatoes from reputable suppliers. Avoid planting seed potatoes that may potentially be carrying late blight, as this is the primary way that disease spreads from season to season. Healthy Seed Photo 4: Courtesy of Departmentĭisease-free seed is the first line of defense against late blight. The following practices focus on limiting sources of infection and modifying the environment to reduce disease development and spread. It is very difficult to control late blight once symptoms are evident. Plants can die within days of being infected when conditions favour rapid late blight development (15 to 20 C and 90 per cent relative humidity). Spores can also be transported in the wind for several miles, or be spread by water runoff from infected areas and by moving machinery. Potato tubers are infected by spores that wash from blight-infected leaves into the soil. Infected plants produce spores that easily spread to adjacent plants. If infected potato tubers are planted, late blight will likely be present on the emerging plants. Sources of infection include infected seed potatoes, infected tomato seedlings and spores blowing in from adjacent diseased gardens, fields or cull piles. Late Blight Disease Development Photo 3: Courtesy of Department Infected potatoes and tomatoes rot quickly, either on the plant or once in storage.

Lesions can also develop on tomato fruit, usually as a bronze or coppery-coloured lesion at the shoulder of the fruit (Photo 5).

#Late blight in tomatoes skin#

Infected potato tubers develop a reddish-brown discolouration just beneath the skin (Photo 4). A strong decay odour often accompanies widespread infection. Stems of infected plants weaken and droop, giving a characteristic flagging appearance to the canopy. Early in the morning or on wet days, a white cottony growth may form on the underside of infected leaves (Photo 3). In dry weather, late blight lesions stop growing and turn dark brown and brittle. Infected stems and petioles will turn dark brown or black (Photo 2). The lesions run across the veins, as opposed to the disease "early blight" where the lesions are typically confined by the leaf veins. On potato and tomato leaves, late blight symptoms first appear as water-soaked lesions surrounded by a pale green halo (Photo 1). Late blight typically affects only potatoes and tomatoes in Saskatchewan, but peppers, eggplant and petunias are also susceptible. Reduce late blight by planting disease-free stock and diligently monitoring for symptoms. However, the cool and rainy conditions encountered across the province in 20 were ideal for late blight, reminding us that wet conditions can lead to substantial loss from blight. In Saskatchewan, the typically warm and dry summers limit disease development and late blight is not a common problem. Late blight is the single most damaging disease of potato. If you have any questions about Google™ Translate, please visit: Google™ Translate FAQs.Ĭontrolling Late Blight in Potato and Tomato Gardens Photo 1: Courtesy of Alberta

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#Late blight in tomatoes portable#

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#Late blight in tomatoes professional#

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#Late blight in tomatoes free#

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