from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative spelling of leaf spot.
from The Century Dictionary and Cyclopedia
- n. A disease affecting the leaves of the rose, maple, etc., caused by parasitic fungi, Phyllosticta, Septoria, etc. It appears in dark spots on the leaves.
- n. The common name given to a large number of fungi which produce spots upon the leaves of plants.
Sorry, no etymologies found.
You also must remove the lower leaves as they discolor from things such as early blight and leaf-spot diseases, and you should mulch your tomatoes and water them by the roots, not the leaves.
Some plants exhibit leaf-stalks of ruby red, with central leaf-spot and nerves like in hue, producing the most beautiful effect.
A bacterial leaf-spot, a leaf-spot caused by a fungus and a rust can be controlled by destroying diseased plant debris.
The Virginia varieties take longer to mature (120140 days in the tropics) than the Spanish-Valencia types and are moderately resistant to Cercospora leaf-spot, a fungal disease that can cause high losses in wet weather unless controlled with fungicides (see Chapter 7).
Most of the local varieties, especially in the more humid areas, are of the Virginia type which has much better leaf-spot resistance.
Dr. Dunstan lists leaf-spot along with some of those listed above, but adds that none are generally serious.
The pecan has quite a number of leaf-spot fungi and most of those we have tested by spraying.
Black walnuts suffer from leaf-spot, blight, or canker, especially in seasons when the trees have been weakened by drought.
Persian walnuts in some places, and nut production is very seriously affected among black walnuts by defoliation prematurely, either because of drought or leaf-spot.
Mr. Durand: What is the best spray for leaf-spot and rust in strawberries?
Trees, Fruits and Flowers of Minnesota, 1916 Embracing the Transactions of the Minnesota State Horticultural Society,Volume 44, from December 1, 1915, to December 1, 1916, Including the Twelve Numbers of "The Minnesota Horticulturist" for 1916