by Cooperative Extension, Washington State University in Pullman, Wash .
Written in English
|Statement||[by Arlen D. Davison].|
|Series||Plant diseases, Extension bulletin -- 1051., Extension bulletin (Washington State University. Cooperative Extension) -- 1051.|
|The Physical Object|
Sooty mold, also called blotch or black mold, plant disease characterized by splotchy black stains or coatings on leaves, stems, and fruit. The black residue of sooty mold is composed of dark fungal threads of a number of ascomycetes, including species of Alternaria, Capnodium, Cladosporium, Fumago, . Sooty mold is a black, non-parasitic, superficialgrowth of fungi on plant surfaces. If you can completely rub the black material off the leaves or plant surfaces with your fingers,it is probably sooty mold; if you cannot rub or wash it off to reveal green, healthy plant tissue, it is probably not sooty mold. Most sooty molds warrant noFile Size: KB. Black sooty mold is an organic substance that is commonly found in nature as a gray-black and velvety, often crust-like coating that may develop on shrubs and trees that are infested with sap-feeding scale insects, or on underlying objects. The black sooty mold grows on the sticky “honeydew” secretions that come from the scale insects. known as black sooty mold. Sooty mold appears as a black staining or powdery coating on leaves and stems. While the black leaves may become unsightly, sooty mold itself does not directly harm the plant. Instead the black fungus affects the plant indirectly by shading the File Size: KB.
Sooty mold, as its name implies, is a dark soot like covering on the leaves and stems of a plant. This "mold" can be scraped off with a fingernail to reveal a healthy green leaf below. The sooty mold is caused by fungi such as Meliola mangiferae, Capnodium mangiferae, C. ramosum, Trichospermum acerinium, Microxyphium columnatum, Lewptoxyphium fumago and Triopospermum myrti. The disease is very common whenever honey dew or sugary substance secreting insects, such as hoppers, scales, coccids and mealy bugs are found. Sooty mold is a type of plant mold. It is a type of mold that growing in the honeydew or secretion of many common plant pests, such as aphids or scale. The pests cover the leaves of your plant in honeydew and the sooty mold spore lands on the honeydew and begins to reproduce. Sooty molds are associated with sucking insect pests (aphids, scales, mealybugs, psyllids) that extract sap from the phloem tissue. Soon after a plant is heavily infested with such a pest, it is usually covered with honeydew. Sucking pests ingest copious amounts of sap to extract nutrients.
Sooty Mold Sooty mold is a charcoal black fungus that appears as a black coating on the surface of leaves, fruits, twigs and branches of many deciduous and evergreen shrubs and trees. This fungus is not pathogenic to plants but obtains its nourishment from insect honeydew. Honeydew is a sweet, clear. Sooty mold is the common name applied to several species of fungi that grow on honeydew secretions on plant parts and other surfaces. The fungi’s dark, threadlike growth (mycelium) gives plants or other substrates the appearance of being covered with a layer of soot. Sooty moulds grow on sugars and appear to out-compete typical “weed” fungi and bacteria. They may produce antibiotics for this purpose and their biochemical potential for obtaining novel bioactive. The pathogens are dark fungi growing either on the "honeydew" excreted by sucking insects or on exuded sap material coming from leaves of certain trees. These sucking insects can include aphids and scale insects and sooty mold may occur on any tree but is most commonly seen on boxelder, elm, linden, and especially maple trees.