Colletotrichum acutatum J.H. Simmonds
Colletotrichum gloeosporioides (Penz.) Penz. & Sacc. in Penz.
Lesions start as small, circular, tan to brown spots on mature or nearly mature fruit. Lesions expand rapidly, with a tendency to form concentric rings that may or may not be sunken. Lesions are firm to the touch but typically develop orange to pink, slimy spore masses in their centers. Individual lesions may reach a diameter of 4–5 cm, but may coalesce to form more extensive areas of infection (A).
Common to all fruit-growing regions in eastern North America, but most serious in warmer production regions.
Young lesions can be confused with brown rot infections. Evidence of sporulation is typically needed to differentiate the various fruit rots.
The disease is difficult to manage when disease pressure is high. Fungicides can be used from fruit ripening through harvest; the strobilurin fungicides and captan are the most effective fungicides.
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