Leaf spots are round blemishes found on the leaves of many species of plants, mostly caused by parasitic fungi or bacteria.
A typical spot is "zonal", meaning it has a definite edge and often has a darker border. When lots of spots are present, they can grow together and become a blight or a blotch. Fungal spots are usually round or free-form in shape.
In most cases, leaf spots are considered to be only a cosmetic problem, but they can have economic effects on nurseries or in floriculture.
Other articles related to "leaf, leaf spot, spot":
... Mountain Chiffchaff Rw Phylloscopus sindianus Plain Leaf Warbler W Phylloscopus neglectus Dusky Warbler W Phylloscopus fuscatus Smoky Warbler sw Phylloscopus fuligiventer Tickell's Leaf Warbler sW Phylloscopus ...
... vesicarium all cause agricultural damage including leaf spot in alfalfa and red clover, purple spot in asparagus, and leaf spot in garlic and onions ... veicarium has historically been the causal agent for leaf spot in garlic and onions but since the late 1990’s, S ... mistaken for Alternaria porri and Septoria Leaf Spot ...
... Cercospora leaf spot Cercospora spp ... Myrothecium leaf spot Myrothecium roridum Phytophthora stem and root rot Phytophthora nicotianae var ... parasitica = Phytophthora nicotianae Pythium root rot Pythium splendens Rhizoctonia leaf spot Rhizoctonia solani Southern blight Sclerotium rolfsii Verticillium wilt Verticillium albo-atrum ...
... mold (winter crown rot) Coprinus psychromorbidus Dilophospora leaf spot (twist) Dilophospora alopecuri Dwarf bunt Tilletia controversa Ergot Claviceps purpurea Sphacelia segetum Fusarium root rot Fusarium ... canadensis Spot blotch Bipolaris sorokiniana Stagonospora blotch (glume blotch) Stagonospora nodorum = Septoria nodorum Phaeosphaeria nodorum = Leptosphaeria nodorum Stalk smut (stripe smut) Urocystis occulta Stem ... rust (yellow rust) Puccinia striiformis Uredo glumarum Take-all Gaeumannomyces graminis Tan spot (yellow leaf spot) Pyrenophora tritici-repentis Drechslera tritici-repentis ...
... Aspergillus flavus Alternaria brown spot Alternaria alternata Alternaria leaf spot of rough lemon Alternaria citri Alternaria stem-end rot Alternaria citri Anthracnose = wither-tip Glomerella cingulata Colletotrichum ... syringae Charcoal root rot Macrophomina phaseolina Citrus black spot Guignardia citricarpa Damping-off Pythium sp ... citri Gray mold (fruit) Botrytis cinerea Greasy spot and greasy spot rind blotch Mycosphaerella citri Stenella citri-grisea Green mold Penicillium ...
Famous quotes containing the words spot and/or leaf:
“No sooner is your ocean filled, than he grumbles that it might have been of better vintage. Try him with half of a Universe, of an Omnipotence, he sets to quarrelling with the proprietor of the other half, and declares himself the most maltreated of men. Always there is a black spot in our sunshine: it is even as I said, the Shadow of Ourselves.”
—Thomas Carlyle (1795–1881)
“frog pond ...
a leaf falls in
without a sound”
—Bernard Lionel Einbond (b. 1937)