![]() ![]() In places with stagnant air, such as basements, moulds can produce a strong musty odour. Glass, plastic, and concrete provide no food for organic growth and as such cannot support mould or mildew growth alone without biofilm present. A variety of other mould species, such as Penicillium or Aspergillus, may appear to grow on non-cellulosic surfaces but are actually growing on the biofilm that adheres to these surfaces. chartarum does not, however, grow on plastic, vinyl, concrete, glass, ceramic tile, or metals. This species is commonly found indoors on wet materials containing cellulose, such as wallboard (drywall), jute, wicker, straw baskets, and other paper materials. "Black mould," also known as "toxic black mould", properly refers to S. Mould growth found on cellulose-based substrates or materials where moisture levels are high (90 per cent or greater) is often Stachybotrys chartarum. Proper identification requires a microbiologist or mycologist. Colour alone is not always a reliable indicator of the species of mould. The black mould which grows in attics, on window sills, and other places where moisture levels are moderate often is Cladosporium. Mildew can be cleaned using specialized mildew remover, or substances such as bleach (though they may discolour the surface). Moulds can thrive on many organic materials, including clothing, leather, paper, and the ceilings, walls and floors of homes or offices with poor moisture control. ![]() The term mildew is often used generically to refer to mould growth, usually with a flat growth habit. Household varieties Unidentified species of mildew growing on a plastic shower curtain (scale gradations = 11 µm) ![]() In Old English, mildew meant honeydew (a substance secreted by aphids on leaves, formerly thought to distill from the air like dew), and later came to mean mould or fungus. It is also used more generally to mean mould growth. In horticulture, mildews are species of fungus in the order Erysiphales, or fungus-like organisms in the family Peronosporaceae. Both mould and mildew produce distinct offensive odours, and both have been identified as the cause of certain human ailments. It appears as a thin, superficial growth consisting of minute hyphae ( fungal filaments) produced especially on living plants or organic matter such as wood, paper or leather. It is distinguished from its closely related counterpart, mould, largely by its colour: moulds appear in shades of black, blue, red, and green, whereas mildew is white. ![]() Ontario’s Biodiversity: Species at Risk.Example of downy mildew (left) along with powdery mildew (right) on a grape leaf Ontario Ministry of Natural Resources: Ontario Tree Atlas. Ontario Tree Atlas map of non-planted Downy Serviceberries. The undersides of the young leaves are very wooly, lending this tree its name of “Downy” Serviceberry. It begins as green, then ripens red to blue-black. The Downy Serviceberry has alternate, simple, oval leaves that are very furry underneath when young.ĭowny Serviceberry flowers are white with slender petals. Serviceberry species can be hard to distinguish from one another due to their habit of freely hybridizing where ranges overlap. The striking white flowers of the Downy Serviceberry add welcome color to forested areas in early spring. This species is commonly found at wood edges and in open fields, where its reddish, berry-like fruits provide food to over 40 species of birds! It can be found as a large shrub, or single trunked small tree. ![]()
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