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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.
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]
The Kennebec plant is non-pigmented, large and erect, with thick stems that are prominently angled. Sprouts are grayish green with a slightly purple bottom. The leaves are broad, long and dark green with slightly pubescent midribs. Primarily the leaflets are ovate, large and grow in pairs of four. Secondary leaflets occur in a medium number.
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 ...
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This variety is a mutation (or sport) of the cultivar 'Burbank's Seedling' that was selected by the plant breeder Luther Burbank in 1873. The known lineage of Russet Burbank began in 1853 when Chauncey E. Goodrich imported the Rough Purple Chili from South America in an attempt to add diversity to American potato stocks which were susceptible to late blight.
In plant pathology, "mosaic" is a symptom, characteristic of many viruses, in which diseased leaves show undefined dark green sectors alternating with lighter colored sectors, ranging from light green to yellow. Potato leaf mosaic symptoms can be caused by different viruses individually or in combination.
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