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Porodaedalea pini, commonly known as the pine conk, [1] is a species of fungus in the family Hymenochaetaceae. It is a plant pathogen that causes tree disease commonly known as "red ring rot" or "white speck". This disease, extremely common in the conifers of North America, decays tree trunks, rendering them useless for lumber. [2]
Pathological pruning, in which all lower branches are pruned regardless of signs or symptoms of infection, may reduce disease instance in white pine tree stands. [ 14 ] Furthermore, genetic hybridization testing has been conducted for more than half a century in order to find resistance among strains of the species, and have since successfully ...
Fusarium circinatum is a fungal plant pathogen that causes the serious disease pitch canker on pine trees and Douglas firs (Pseudotsuga menziesii).The most common hosts of the pathogen include slash pine (Pinus elliottii), loblolly pine (Pinus taeda), Monterey pine (Pinus radiata), Mexican weeping pine (Pinus patula), and Douglas fir. [1]
The disease can infect trees as young as 6 years-old, and infects trees throughout their lifespan. [2] Diagnostic symptoms include crown yellowing and thinning, a distress crop of cones, red brown stained outer heartwood, and laminate decay (decay that separates along annual rings).
Classic root disease center symptoms for H. irregulare. Many woody plant species have been reported as hosts for H. irregulare.Hosts consist of pines and some other conifers and hardwoods, including ponderosa pine (Pinus ponderosa), [3] shortleaf pine (Pinus echinata), red pine (Pinus resinosa), [4] incense-cedar (Calocedrus decurrens), western juniper (Juniperus occidentalis), and Manzanita ...
The diseases symptoms include: damping off and collar rot of seedlings, stem canker, root disease, and, most commonly, shoot blight. These symptoms have caused significant economic loss to nurseries and pine plantations. In a nursery in the north-central United States, losses of 35% have been reported. [1]
P. schweinitzii is a polypore, although unlike bracket fungi the fruiting body may appear terrestrial [citation needed] when growing from the roots or base of the host tree. [2] The fruiting bodies, appearing in late summer or fall, commonly incorporate blades of grass, twigs, or fallen pine needles as they grow. [3]
Symptoms on Scots pine Symptoms on jack pine. Cyclaneusma (needle cast) is a fungal disease that is a part of the phylum, Ascomycota. It infects plants that are of pine classification. [1] After infection by Cyclaneusma, most pines do not display symptoms until 10 months after the initial infection. Symptoms include needles developing yellow ...