Potato, Sweet
Symptom Cause  
Soft, watery rot on stored tubers
Bacterial Soft Rot
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Small, round, brown spots on potato tubers; stem may also show decay
Black Rot
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Spots develop blights on leaves; eventually leaves may die; tubers develop puckered skin and shallow rough lesions; mold
Blight, Early
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Spots develop blights on leaves; eventually leaves may die; tubers develop puckered skin and shallow rough lesions; mold
Blight, Late
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Plants stunted, yellow
Root Knot Nematodes
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Dark brown, black spots on skins
Scurf
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Break in skin when harvested
Skin breaks
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Young infected plants may die after transplanting; survivors develop bright yellow leaves, stems rot; poor harvest
Stem Rot
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Tiny, black hopping insect, shot holes in foliage
Sweet Potato Flea Beetle
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Tunnels in roots and stems, leaves chewed, weevils in potatoes in storage
Sweet Potato Weevil
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