Leaf Spot

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.

Famous quotes containing the words leaf and/or spot:

    Thus it seemed that this one hillside illustrated the principle of all the operations of Nature. The Maker of this earth but patented a leaf. What Champollion will decipher this hieroglyphic for us, that we may turn over a new leaf at last?
    Henry David Thoreau (1817–1862)

    Mark where the pressing wind shoots javelin-like
    Its skeleton shadow on the broad-backed wave!
    Here is a fitting spot to dig Love’s grave;
    George Meredith (1828–1909)