Alternaria solani
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Symptoms:
Fruit damage caused by early blight is the appearance of sunken, leathery, dark lesions near the stem scar. Fruit become infected when green. This disorder is more commonly known as a foliar or stem disorder. Leaf infection is notable first on older leaves with the appearance of irregular brown necrotic lesions surrounded by an area of yellowing tissue. Early season damp rainy weather encourages infection, and the symptoms become noticeable rapidly with increasing temperatures in mid-season. Heavy dews and overhead irrigation can contribute to disease spread.
Fruit damage caused by early blight is the appearance of sunken, leathery, dark lesions near the stem scar. Fruit become infected when green. This disorder is more commonly known as a foliar or stem disorder. Leaf infection is notable first on older leaves with the appearance of irregular brown necrotic lesions surrounded by an area of yellowing tissue. Early season damp rainy weather encourages infection, and the symptoms become noticeable rapidly with increasing temperatures in mid-season. Heavy dews and overhead irrigation can contribute to disease spread.
Control:
Crop rotations, fungicide sprays.
