Blue mold

Blue mold

Blue mold is a downy mildew disease of tobacco that is caused by "Peronospora tabacina", a fungus-like protist in the family Peronosporaceae. Blue mold can cause severe damage to susceptible tobacco plants in many parts of the world. Since it is an obligate parasite, it must have living tobacco tissue in order to grow.

Although tobacco remains the primary host for this disease, other hosts including pepper plants and eggplants can also be reservoirs.

ee also

* The term blue mold may also be applied to "Penicillium roqueforti", a mold used in producing the taste and characteristic blue-green inclusions in Roquefort and other blue cheeses.

* A powdery mildew disease of hops has sometimes been erroneously called blue mold. It is caused by "Sphaerotheca humuli", a fungus in the order Erysiphales. This hops disease became epidemic in the New York state hops industry in 1909, ultimately leading to the abandonment of the crop in the Northeastern USA.


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  • Blue mold — Blue Blue (bl[=u]), a. [Compar. {Bluer} (bl[=u] [ e]r); superl. {Bluest}.] [OE. bla, blo, blew, blue, livid, black, fr. Icel.bl[=a]r livid; akin to Dan. blaa blue, Sw. bl[*a], D. blauw, OHG. bl[=a]o, G. blau; but influenced in form by F. bleu,… …   The Collaborative International Dictionary of English

  • blue mold — n any of various fungi of the genus Penicillium that produce blue or blue green surface growths …   Medical dictionary

  • blue mold — blue′ mold′ n. fng mcr any fungus of the genus Penicillium forming a bluish green, furry coating on foodstuffs inoculated by its spores • Etymology: 1655–65 …   From formal English to slang

  • blue mold — n. any of various species of a fungus (genus Penicillium) that produce bluish masses of spores: some species yield penicillin and some are used to ripen certain cheeses …   English World dictionary

  • blue mold — noun 1. : a fungus of the genus Penicillium; especially : a mold that produces blue or blue green surface growths on bread and other foods compare green mold 2. also blue mold rot : a plant disease caused by a blue mold fungus …   Useful english dictionary

  • blue mold rot — noun see blue mold 2 …   Useful english dictionary

  • blue mold — n. mold, blue greenish fungus that forms on foods (such as cheese, bread etc.) …   English contemporary dictionary

  • blue mold — 1. Also called green mold. any fungus of the genus Penicillium, which forms a bluish green, furry coating on foodstuffs inoculated by its spores. 2. Plant Pathol. a. a disease of plants, characterized by necrosis of leaves or fruit and the growth …   Universalium

  • blue mold — noun Date: 1664 any of various fungi (genera Penicillium and Peronospora) that produce blue or blue green surface growths …   New Collegiate Dictionary

  • blue mold fungus — noun fungus causing a serious disease in tobacco plants characterized by bluish grey mildew on undersides of leaves • Syn: ↑Peronospora tabacina • Hypernyms: ↑downy mildew, ↑false mildew • Member Holonyms: ↑Peronospora, ↑genus Peronospora …   Useful english dictionary

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