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The causative agent (Rigidoporus lignosus) persists on dead or live root debris for a long time, while causing new infections on healthy plants. This fungus has a wide host range (more than 100 woody species in the Ivory Coast have been recorded as being susceptible) and causes the greatest losses in plantations of H. brasiliensis and, to a ...
Inonotus dryadeus is a parasitic saprobic fungus, [1] with spores entering wounds on broadleaf trees (predominantly oak, although sometimes maple, elm and chestnut). [4] The fungus is primarily a root decay fungus, rotting the below−ground parts of roots. Detection is often difficult if the conks have not developed.
The white rot fungus found in the roots is the sign of telling whether the tree has been affected by H. annosum. The bark changes colors as the stages progress, they go from pale yellow, to a crusty light brown, and finally in its advanced stage it turns white with the signature of Fomes annosus ―a sprinkled streak of black spots.
The disease tends to occur in patches due to a primarily short range spread mechanism. [3] Infected or decayed roots break close to the root collar forming “root balls.” [1] Laminated root rot is frequently detected during ground survey when canopy openings and standing dead and fallen trees are observed. [4]
Heterobasidion irregulare is a tree root rotting pathogenic fungus that belongs to the genus Heterobasidion, which includes important pathogens of conifers and other woody plants. It has a wide host and geographic range throughout North America and causes considerable economic damage in pine plantations in the United States.
Armillaria tabescens is found to attack trees that are already stressed or have a wound. The pathogen can spread its mycelia and get into the trunk or root of a tree. [9] The fungus has the ability to spread its mycelia throughout the root and trunk system and form mycelial mats.
Because this disease is caused by multiple species within the genus Armillaria, it has an extremely broad host range. Hundreds of trees and shrubs are susceptible to root rot to varying degrees. In fact, the only two genera of tree known to be resistant to Armillaria root rot are larch and birch. Further investigation is being conducted for ...
Butt rot is a disease of plants, mostly trees, caused by fungi. The fungus attacks the moist, poorly protected undersurface of tree trunk's thickest part (the "butt" above the root, as opposed to "top"), where the end of the stem makes contact with the soil. It may affect the roots as well, causing a disease known as root rot. It then moves up ...