Two Epidemics of Potato Blight and Rot (Classic Reprint) - Softcover

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Excerpt from Two Epidemics of Potato Blight and Rot

Blight is caused by a parasitic fungus which spreads through the leaves, killing the tissues as it goes. Each blighting leaf produces thousands of minute fungus spores each capable of infecting another leaf, or a potato tuber. (p.

Bordeaux mixture forms a protective film on the healthy leaves, kills the spores which fall thereon, and also kills those produced on the diseased leaves at the time of application. (p.

Much, if not. All, of the disease comes originally from plant ing diseased seed tubers. Rain, dew, wind, insects, etc., are the chief agencies in disseminating the spores. (p.

Late bligh't is most destructive in rainy or cloudy weather. Hot, dry, sunshiny weather is fatal to the blight spores, and outbreaks Of the disease never occur under these conditions. (p 173)

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