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Urushiol-induced contact dermatitis (also called Toxicodendron dermatitis or Rhus dermatitis) is a type of allergic contact dermatitis caused by the oil urushiol found in various plants, most notably sumac family species of the genus Toxicodendron: poison ivy, poison oak, poison sumac, and the Chinese lacquer tree. [1]
Metopium toxiferum, the poisonwood, Florida poisontree, or hog gum, is a species of flowering tree in the cashew or sumac family, Anacardiaceae, that is native to the American Neotropics. It produces the irritant urushiol much like its close relatives poison sumac and poison oak. It is related to black poisonwood (Metopium brownei).
Symptoms include bleeding cankers on the tree's trunk and dieback of the foliage, in many cases leading to the death of the tree. P. ramorum also infects a great number of other plant species, significantly woody ornamentals such as Rhododendron, Viburnum, and Pieris, causing foliar symptoms known as ramorum dieback or ramorum blight.
The symptom of black pod disease is a necrotic lesion on the cocoa pod that is brown or black in color, which eventually enlarges to cover the whole pod. White mycelia growth on lesions that appear several days after infection is a sign of the causal pathogen of black pod disease, which is Phytophthora spp .
Also known as phlegm, mucus is made up of mostly water, but it also contains "remnants of skin-lining cells (epithelial cells), antimicrobial enzymes, proteins and inorganic salts," explains Nasseri.
South American leaf blight, caused by the ascomycete Pseudocercospora ulei, [7] [8] [9] also called Microcyclus ulei, [10] ended the cultivation of the rubber tree (Hevea brasiliensis) in South America. [7] On leaf tissue, symptoms of blight are the initial appearance of lesions which rapidly engulf surrounding tissue.
Along with a runny nose and sore throat, green phlegm is another cold-like symptom of COVID-19. Interestingly, the color of the mucus is an important indicator when it comes to infection.
Spray programs of conventional fungicides are advised to begin when powdery mildew symptoms and signs are first noticed. [11] Conventional fungicides should be applied on a regular basis for best results against the disease. [11] Control is possible with triadimefon and propiconazole. It is also possible with hexaconazole, myclobutanil, and ...