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Black rot Ceratocystis fimbriata Chalara sp. [anamorph] Blue mold rot Penicillium spp. Cercospora leaf spot Cercospora spp. Phaeoisariopsis bataticola = Cercospora bataticola, C. batatas, C. ipomoeae. Charcoal rot Macrophomina phaseolina: Chlorotic leaf distortion Fusarium lateritium Gibberella baccata [teleomorph] Circular spot Sclerotium rolfsii
People can observe P. infestans produce dark green, then brown then black spots on the surface of potato leaves and stems, often near the tips or edges, where water or dew collects. [9] The sporangia and sporangiophores appear white on the lower surface of the foliage. As for tuber blight, the white mycelium often shows on the tubers' surface. [10]
One example is the Ipomoea form of the fungus, which is specific to sweet potato (Ipomea batatas) and wild morning glory. Symptoms can be found on the fleshy root or visible in plants. [3] On sweet potato, Ceratocystis fimbriata causes a disease called 'black rot,' which displays firm and dry circular brown/black rots. Infected plants often ...
Sweet potatoes are susceptible to a number of diseases during the postharvest storage period and during shipping. [1] [2] The most common are Rhizopus soft rot (Rhizopus stolonifer), bacterial soft rot (Erwinia chrysanthemii), Fusarium root rot (Fusarium solani), Fusarium surface rot (Fusarium oxysporum), and black rot (Ceratocystis fimbriata).
Alternaria solani is a fungal pathogen that produces a disease in tomato and potato plants called early blight. The pathogen produces distinctive "bullseye" patterned leaf spots and can also cause stem lesions and fruit rot on tomato and tuber blight on potato. Despite the name "early", foliar symptoms usually occur on older leaves. [3]
The severity of Septoria leaf spot of Potato in the Northwestern countries of South America is notable. The disease destroys up to 60% of potato yield in South America causing significant crop loss in Andean countries. [5] Moreover, countries within the European Union and elsewhere around the world are susceptible to establishment of the disease.
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A sign of black dot disease is black microsclerotia that are produced by the pathogen, and can be found on the roots, the tuber, the stems, and the leaves. [3] This can be used to diagnose black dot. Symptoms of black dot disease include silvery lesions on the surface of the tuber, brown or black lesions on the leaves, leaf wilting, and ...