How Long Are Spores in Soil with Early Blight?

Early blight generally affects tomato (Lycopersicon esculentum) and potato (Solanum tuberosum) plants, dispersing quickly enough to infect your complete crop before it is time to harvest, though many infected crops are still produce fruit. Your crops are not secure this season last year, if you had a problem with the infection. The spores survive more than one season, meaning by overwintering in the dirt that they are able to live to infect new plants.

Early Blight Basics

Caused by the Alternaria fungus, early blight generally starts as brown dots on the leaves of the curry and tomato plants, though it also affects fruit and stems. The circles develop eventually causing the leaves to yellow or the fruit . Infected leaves drop off, also it a lot of leaves are lost by that the plant, it’ might die or produce fruit that is less.

Overwintering at Soil

They spread primarily through rain and wind After the fungus produces spores; the rain washes off them splashes on them upwards onto leaves from the ground and then leaves. Spores that property in the soil at fall survive by overwintering in organic matter, such as plant debris. Spores such as under the surface of the soil or under the foliage stack of last year — survive fluctuating temperatures, including being continuously frozen and thawed although they like weather. The spores are all set to attack a new generation of potatoes and tomatoes when you plant .

Potential Lifespan

Early blight spores can live in the dirt — one year normally is the minimal. The precise lifespan is not known, but if you’re planning to help control the disease by crops out of infected areas, maintain the regions bare for four years, recommends the Colorado State University Extension. Rotation demands a degree of separation, and shifting rows a few feet to one side will not rescue them from traveling spores, but moving your garden.

Requirements for Spore Growth

Regardless of how long the spores have dwelt in the soilthey have the best possibility of infecting your tomatoes and potatoes and reproducing as soon as the conditions exist. Early blight spores favor warm weather — 80 degrees Fahrenheit or warmer. They require moisture to survive, but they require alternating periods of moisture and dryness to correctly reproduce. By maintaining the crops dry as you can, using drip irrigation rather than overhead watering can help reduce the spread of the disease.

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