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A. mali can still penetrate the stomates and hydathodes of leaves. [4] As with most pathogens, Alternaria mali resistance involves a gene-for-gene relationship. [4] Apple trees can recognize invading pathogens and mount a defense. [4] Often, the plant may be able to resist the pathogen, even though it has no genetic resistance to same.
Bitter rot of apple is a fungal disease of apple fruit that is caused by several species in the Colletotrichum acutatum and Colletotrichum gloeosporioides species complexes. [1] It is identified by sunken circular lesions with conical intrusions into the apple flesh that appear V-shaped when the apple is cut in half through the center of the ...
Viral diseases; Apple chlorotic leafspot genus Trichovirus, Apple chlorotic leafspot virus (ACLSV) Apple dwarf (Malus platycarpa) Apple stem pitting virus (ASPV) (? not US/CAN) Apple flat apple genus Nepovirus, Cherry rasp leaf virus (CRLV) Apple mosaic genus Ilarvirus, Apple mosaic virus (ApMV) genus Ilarvirus, Tulare apple mosaic virus (TAMV)
A branch collar is the "shoulder" between the branch and trunk of woody plants; the inflammation formed at the base of the branch is caused by annually overlapping trunk tissue. [1] The shape of the branch collar is due to two separate growth patterns, initially the branch grows basipetally, followed by seasonal trunk growth which envelops the ...
Botryosphaeria obtusa is a plant pathogen that causes frogeye leaf spot, black rot and cankers on many plant species. [1] On the leaf it is referred to as frogeye leaf spot; this phase typically affects tree and shrubs. In fruit such as the apple, cranberry and quince, it is referred to as black rot, and in twigs and trunks it causes cankers. [1]
Lemon tree with Phytophthora collar rot. Collar rot is a symptomatically described disease that is usually caused by any one of various fungal and oomycete plant pathogens. It is present where the pathogen causes a lesion localized at or about the collet between the stem and the root. The lesions develop around the stem eventually forming a ...
Marssonina blotch on a 'Rome' apple tree. Marssonina blotch was historically an important apple disease in Japan [3] and China. [5] In the 1990s it became an important apple disease in India, [6] and Korea. [7] Marssonina blotch was detected in Europe by the early 2000s [8] where it caused widespread disease, especially on organically managed ...
Alternaria alternata is a fungus causing leaf spots, rots, and blights on many plant parts, and other diseases. It is an opportunistic [ citation needed ] pathogen on over 380 host species of plant. It can also cause upper respiratory tract infections [ 1 ] and asthma in humans with compromised immunity.
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