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'Vitelotte' potatoes have a dark blue, almost black, skin and dark violet-blue flesh; they have a characteristic nutty flavour and smell of chestnuts. The colour is retained in cooking, and is due to natural pigments in the anthocyanin group of flavonoids. [4] The plants mature late and, compared to modern varieties, are relatively low-yielding.
Fusarium dry rot of potato is a devastating post-harvest losses (vegetables) disease affecting both seed potatoes and potatoes for human consumption. [3] Dry rot causes the skin of the tuber to wrinkle. The rotted areas of the potato may be brown, grey, or black and the rot creates depressions in the surface of the tuber.
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]
Potato leafroll virus: genus Luteovirus, Potato leafroll virus (PLRV) Potato mop-top virus (spraing of tubers) genus Furovirus, Potato mop-top virus (PMTV) Potato rugose mosaic: genus Potyvirus, Potato virus Y (PVY, strains O, N and C) Potato stem mottle (spraing of tubers) genus Tobravirus, Tobacco rattle virus (TRV) Potato spindle tuber ...
However, Rizzo notes, purple potatoes can be harder to find and a little more expensive than other potato varieties. And, all that said, it's a "huge misconception" that sweet potatoes are vastly ...
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
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The Russian blue potato plant produces medium round and oblong tubers with deep purple insides. [1] It is a late season variety of potato. The plants themselves are large, semi-erect, and produce light blue flowers and dark foliage. [2] [3] [4]