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:
“On leaf of palm, on sedge-wrought roll;
On plastic clay and leathern scroll,
Man wrote his thoughts; the ages passed,
And lo! the Press was found at last!”
—John Greenleaf Whittier (1807–1892)
“One of the most difficult aspects of being a parent during the middle years is feeling powerless to protect our children from hurt. However “growthful” it may be for them to experience failure, disappointment and rejection, it is nearly impossible to maintain an intellectual perspective when our sobbing child or rageful child comes in to us for help. . . . We can’t turn the hurt around by kissing the sore spot to make it better. We are no longer the all-powerful parent.”
—Ruth Davidson Bell (20th century)