The loss of turgor and the drooping of plant parts, usually following a water deficit. The death of a branch in a tree where the leaves remain attached. In either case, the diseased portion stands out like a flag.
Many flagging branches in this hazelnut orchard that have been girdled by eastern filbert blight.
Jay W. Pscheidt, 2007.
The study of factors influencing the initiation, development, and spread of infectious disease. Also, the study of disease in populations.
A conspicuous fleshy fungus fruiting body.
A ring of mushrooms may be associated with living trees or places trees once stood.
Jay W. Pscheidt.
The process of producing spores.
A blot or spot, usually superficial and irregular in shape and size, on leaves, shoots and fruit.
Producing fusing gametes on separate and distinct mycelia.
A local elevation of the epidermis that may rupture to expose the causal agent (e.g., rust, smut, white rust, etc.).
Numerous rust pustules can be seen on this serviceberry stem.
Haywood Photography, 2005.
The enzyme that breaks down pectic substances to simple carbohydrates.
Symptom of a virus disease in which regions along the veins are darker green than the tissue between the veins.
