Typical symptoms of ramularia comprise small, reddish/brown, rectangular lesions, often surrounded by a yellow margin (halo) of chlorosis. Following high levels of infection, leaves may senesce ...

Do not fertilize trees and shrubs with leaf spot diseases unless a soil test recommends it to correct a nutrient deficiency. Fungicides are not necessary unless a tree has lost all its leaves several ...

The first symptoms do not typically show until late autumn or early winter. Initially, light-green circular lesions form on the leaf surface (often in association with trapped water droplets). On the ...

Images: (top left) Dark interveinal bands indicating BLD infection as seen looking up into the canopy from the understory; (top right) The full range of upper leaf surface symptoms from undersized ...

Northern corn leaf blight occurs commonly in most areas of the Midwestern U.S. where corn is grown. Yield losses are typically minimal, but can become significant with susceptible hybrids or inbreds.

Generally, there are four leading causes for leaf drop in fiddle-leaf figs. Knowing the signs and symptoms of each issue and the remedies will help you to promptly return the houseplant to health.

Anthracnose can be found on all parts of corn throughout the growing season. However, the disease is most often observed as a 1) leaf blight or spot, 2) top dieback, or 3) stalk rot. Foliar symptoms ...