![]() Wet conditions and high temperatures, like the ones we’ve been having lately in Edmonton, are major risk factors for the spread of early blight. The pathogen will also hide in the soil, transmitting easily to other plants. The disease will gradually spread to the whole leaf and progressively affect the whole plant. When affected by early blight, tomato plants and potato plants will first show brown spots on the leaves that form a distinctive “bullseye” pattern. Tomato and potato plants are the most common plants to show symptoms of early blight. The disease overwinters through our harsh Alberta winters and causes mayhem in affected vegetable gardens. There are a handful of common diseases known as “blights”, due to blight as the main symptom, that we commonly see in Edmonton gardens.Įarly blight is a disease caused by the fungal pathogen Alternaria solani. This leads to the tissue turning brown and dying off. By definition, blight itself is the progression of chlorosis, which is the condition of plant tissue that isn’t producing enough chlorophyll. ![]() My poor tomato plant had fallen victim to blight.īlight is actually a symptom of many diseases and not a disease of its own. As I went to greet the day’s harvest, I discovered that one of my plants was not looking so hot. This system was working out really well for me until a nasty surprise caught me off-guard the other day. Every day, I have more perfectly red tomatoes begging to be plucked off the plant and plunked into a salad. We’re officially in the dog days of summer, and all the labour I’ve been pouring into my tomato plants is paying off. ![]()
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