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Black knot occurs only on the woody parts of trees, primarily on twigs and branches, but can spread to larger limbs and even the trunk. Olive-green swellings from the disease are visible in the late spring; as it spreads and matures, typically by autumn, rough black knots circle and kill affected parts. The knots vary in diameter from one inch ...
Trichothecium roseum is a fungus in the division Ascomycota first reported in 1809. [1] It is characterized by its flat and granular colonies which are initially white and develop to be light pink in color. [1] This fungus reproduces asexually through the formation of conidia with no known sexual state. [1]
Taphrina pruni is a fungal plant pathogen of blackthorn (Prunus spinosa) that causes the pocket or bladder plum gall, a chemically induced distortion of the fruit (sloes), producing swollen on one side, [1] otherwise deformed and flattened fruit gall without a stone. [2] The twigs on infected plants may also be deformed with small strap-shaped ...
Burrs on a tree trunk in Norfolk, England. A burl (American English) or burr (British English) is a tree growth in which the grain has grown in a deformed manner. It is commonly found in the form of a rounded outgrowth on a tree trunk or branch that is filled with small knots from dormant buds. Burl formation is typically a result of some form ...
Diaporthe perniciosa a species of fungus in the family Diaporthaceae.It is a plant pathogen.. The names Phoma prunorum Cooke, Phomopsis prunorum (Cooke) Grove, and Phomopsis mali Roberts have been used for its asexual (anamorph) form.
A fungus in the genus Taphrina often attacks the plums; the young ovaries swell, often much larger than full grown plums, become hollow and often persist on the tree in winter. Known as "plum pockets", they appear pale green, leathery to the touch, and hollow with the exception of a few fibrous bands. The disease reduces regeneration of the plums.
Christmas tree prices continue to climb. Last year, U.S. customers paid an average of about $80 for a real tree, according to the National Christmas Tree Association.That was up from $70 in 2021 ...
Inonotus obliquus, commonly called chaga (/ ˈ tʃ ɑː ɡ ə /; a Latinisation of the Russian word ча́га), is a fungus in the family Hymenochaetaceae. It is parasitic on birch and other trees. The sterile conk is irregularly formed and resembles burnt charcoal.