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The disease is generally distributed throughout the U.S., Canada, and various parts of the world where humid conditions occur. The cherry leaf spot fungus prefers moderately wet conditions, with temperatures above 60 °F (16 °C). Optimal temperature range for the spread of this fungus is between 60–68 °F (16–20 °C). [11]
A leaf spot is a limited, discoloured, diseased area of a leaf that is caused by fungal, bacterial or viral plant diseases, or by injuries from nematodes, insects, environmental factors, toxicity or herbicides. These discoloured spots or lesions often have a centre of necrosis (cell death). [1] Symptoms can overlap across causal agents, however ...
Shot hole disease. Cherry leaves with a mild shot hole disease infection. Shot hole disease (also called Coryneum blight) is a serious fungal disease that creates BB -sized holes in leaves, rough areas on fruit, and concentric lesions on branches. The pathogen that causes shot hole disease is Wilsonomyces carpophilus. [1]
Corynespora cassiicola ring-spots symptoms on the leaves of tomato plants. Photograph by Dr. Ken Pernezny from University of Florida. Corynespora cassiicola is a species of fungus well known as a plant pathogen. It is a sac fungus in the family Corynesporascaceae. It is the type species of the genus Corynespora.
Dracaena surculosa, called the gold dust dracaena and spotted dracaena, is a species of flowering plant in the family Asparagaceae, native to west and west-central tropical Africa, from Guinea to the Republic of the Congo. [2][1] Its cultivar 'Florida Beauty' has gained the Royal Horticultural Society 's Award of Garden Merit. [3]
Mycosphaerella angulata is a major pathogen affecting the muscadine grape. Infection occurs mainly after midseason. The primary symptoms of this disease are faint chlorotic spots on the leaves. The chlorotic spots continue to grow in size during the growing season, forming angular brown lesions in the center. The irregular lesions on the leaves ...
F.A.Wolf (1912) Diplocarpon rosae is a fungus that creates the rose black spot disease. [1] Because it was observed by people of various countries around the same time (around 1830), the nomenclature for the fungus varied with about 25 different names. The asexual stage is now known to be Marssonina rosae, while the sexual and most common stage ...
Spilocaea oleaginea. Spilocaea oleaginea is a deuteromycete fungal plant pathogen, the cause of the disease olive peacock spot, also known as olive leaf spot and bird's eye spot. This plant disease commonly affects the leaves of olive trees worldwide. The disease affects trees throughout the growing season and can cause significant losses in yield.