Search results
Results from the WOW.Com Content Network
Main Menu. News. News
Rhytisma acerinum is a plant pathogen that commonly affects sycamores and maples in late summer and autumn, causing tar spot. Tar spot does not usually have an adverse effect on the trees' long-term health. [1] R. acerinum is an Ascomycete fungus that locally infects the leaves of trees and is a biotrophic parasite. [2]
Slime flux, also known as bacterial slime or bacterial wetwood, is a bacterial disease of certain trees, primarily elm, cottonwood, poplar, boxelder, ash, aspen, fruitless mulberry and oak. A wound to the bark, caused by pruning, insects, poor branch angles or natural cracks and splits, causes sap to ooze from the wound. Bacteria may infect ...
[10] [11] The pathogen often makes Douglas fir trees unsalable as Christmas trees and affects the Christmas tree farming industry. [10] Douglas firs are also affected by Phaeocryptopus gaumanni which causes Swiss needle cast. [6] Red band needle blight is a fungal disease which affects coniferous trees, particularly pine, with a worldwide ...
Pruning and treatment dots also give a heads-up to property owners near the trees. This way, when the city notifies them of an upcoming pruning or treatment, they know which trees will be affected.
A healthy tree naturally combats heart rot through a process called compartmentalization. The tree grows around the decayed wood tissue and prevents the fungus from spreading to a larger area of the trunk. Providing a tree with the necessary nutrients, water, and growing conditions will promote healthy growth and minimize rot.
Haematomma accolens, commonly known as the tree bloodspot, is a species of crustose lichen in the family Haematommataceae. [5] It forms thin to moderately thick patches on tree bark, appearing yellowish-white to greenish-grey in colour, and features vivid red to deep reddish-orange spore-producing structures ().
An early sign is what looks like a bleeding spot on the tree. A reddish-brown fluid will ooze from the wound site, giving it this appearance. Later, perithecia will form around the dead spot, which is another sign of the disease. [1] [2] Symptoms of beech bark disease can be observed in the foliage and on the bole of the tree. Foliage may ...