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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]
Peach tree leaves displaying various stages of the shot hole disease: brown spots on the leaf with conidium holders in the middle (center) that eventually fall off, leaving BB-sized holes behind (left) Shot hole disease of apricot leaves. The fungal pathogen Wilsonomyces carpophilus affects members of the Prunus genera. Almond, apricot ...
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) Apple stem grooving = Apple decline of Virginia crab genus Capillovirus, Apple stem grooving virus (ASGV) Apple stem pitting = apple Spy 227 epinasty and decline
5. Low Humidity. Light brown spots scattered across fiddle leaf fig leaves can be caused by dry air. If the brown spots in question have a pox-like look instead of being in a single area of the ...
Venturia inaequalis is an ascomycete fungus that causes the apple ... until the leaves and fruit fall from the tree at ... brown and corky spots. The apple skin and ...
Apple scab is a common disease of plants in the rose family that is caused by the ascomycete fungus Venturia inaequalis. [1] While this disease affects several plant genera, including Sorbus, Cotoneaster, and Pyrus, it is most commonly associated with the infection of Malus trees, including species of flowering crabapple, as well as cultivated apple.
Sooty blotch and flyspeck is a descriptive term for a condition of darkly pigmented blemishes and smudges caused by a number of different fungi affecting fruit including apples, pear, persimmon, banana, papaya, and several other cultivated tree and vine crops. The greenish black coating resembling soot or flyspeck-like dots grow into irregular ...
On the apple tree, the infections occur on leaves, fruit and young twigs. [4] The brightly colored spots produced on the leaves make it easy to identify. Small, yellow-orange spots appear on the upper surfaces of the leaves, anytime from April to June. [5] These spots gradually enlarge and turn orange or red and may show concentric rings of color.