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Cedar apple rust is caused by the fungi Gymnosporangium or more specifically Gymnosporangium juniperi-virginianae that spend part of their life cycles on Eastern Red Cedars growing near orchards. The complex disease cycle of cedar apple rust, alternating between two host plants, was first delineated by Anders Sandøe Ørsted .
Gymnosporangium is a genus of heteroecious plant-pathogenic fungi which alternately infect members of the family Cupressaceae, primarily species in the genus Juniperus (), and members of the family Rosaceae in the subfamily Amygdaloideae (apples, pears, quinces, shadbush, hawthorns, rowans and their relatives).
Planting of less susceptible apple cultivars, horticultural practices that promote tree health and reduce fruit wetness hours, removal of overwintering diseased twigs and fruit, and fungicides Bitter rot of apple is a fungal disease of apple fruit that is caused by several species in the Colletotrichum acutatum and Colletotrichum ...
These spores rise into the air and land on the surface of a susceptible tree, where they germinate and form a germ tube that can directly penetrate the plant's waxy cuticle. A fungal mycelium forms between the cuticle and underlying epidermal tissue, developing asexually the conidia , that germinate on fresh areas of the host tree, which in ...
The inoculation of Venturia inaequalis, a fungus that causes apple scab on apple tree leaves, with C. cladosporioides led to decreased conidial production in V. inaequalis. [11] As this effect is seen both on younger and older leaves C. cladosporioides is effective in preventing and controlling infections of V. inaequalis in apple trees. [11]
Exsudoporus frostii is a mycorrhizal species, [30] meaning that the fungus forms associations with the roots of various species of trees. These associations are mutualistic, because the fungus absorbs mineral nutrients from the soil and channels these into the plant, while the plant provides the fungus with sugars, a product of photosynthesis.
Susceptible tree species will never grow in ground overtaken by Phytophthora. The fungus has especially become the scourge – if not the Scrooge – of Fraser firs, the most popular Christmas ...
Several Xylaria mali fungi growing at Montgomery, Alabama: Scientific classification ... Xylaria mali is a plant pathogen that causes black rot on apple. References ...