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These applications are to protect the apples from spores being released from the cedar host in mid-spring. If cedar apple rust disease is diagnosed on apple fruits and leaves it is far too late to spray. Although curative fungicides also exist for cedar apple rust, they must still be applied before trees begin to develop symptoms. [13]
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).
Rust fungi can produce up to five spore types from corresponding fruiting body types during their life cycle, depending on the species. Roman numerals have traditionally been used to refer to these morphological types. 0-Pycniospores from Pycnidia. These serve mainly as haploid gametes in heterothallic rusts. I-Aeciospores from Aecia.
Almond rust is a disease of almond trees that is characterized by angular yellow leaf spots on upper leaf surfaces and rusty brown masses of spores on lower leaf surfaces. [6] It was first discovered in the upper Sacramento Valley area of California but now has subsequently spread throughout both the Sacramento and San Joaquin valley orchards ...
Sometimes mistaken for a fungal infection, various species of mite develop irregular rust-like erineum; the commonest is caused by the apple leaf mite. The mites live and feed amongst minute, globular or wooly hairs on either side of the leaf, during the summer. The erineum are whitish-pink or red at first, later becoming rust-brown.
Gymnosporangium sabinae is a species of rust fungus in the subdivision Pucciniomycotina. Known as pear rust , European pear rust , or pear trellis rust , it is a heteroecious plant pathogen with Juniperus sabina (savin juniper) as the main primary ( telial ) host and Pyrus communis (common pear) as the main secondary ( aecial ) host.
Chrysophyllum oliviforme, commonly known as the satinleaf, [3] is a medium-sized tree native to Florida, the Bahamas, the Greater Antilles, and Belize. It is also known as damson plum, [3] wild star-apple [3] and saffron-tree. [4] It gets the name "satinleaf" from the distinctive colors of the leaves.
Averrhoa carambola is a species of tree in the family Oxalidaceae native to tropical Southeast Asia; [1] it has a number of common names, including carambola, star fruit and five-corner. [2] It is a small tree or shrub that grows 5 to 12 m (16 to 39 ft) tall, with rose to red-purple flowers.