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Leaf spots can vary in size, shape, and color depending on the age and type of the cause or pathogen. Plants, shrubs and trees are weakened by the spots on the leaves as they reduce available foliar space for photosynthesis. Other forms of leaf spot diseases include leaf rust, downy mildew and blights. [4]
Prunus serotina, commonly called black cherry, [3] wild black cherry, rum cherry, [4] or mountain black cherry, [5] is a deciduous tree or shrub [4] in the rose family Rosaceae. Despite its common names, it is not very closely related to commonly cultivated cherries .
Dibotryon morbosum or Apiosporina morbosa is a plant pathogen, which is the causal agent of black knot. [1] [2] It affects members of the Prunus genus such as; cherry, plum, apricot, and chokecherry trees in North America. The disease produces rough, black growths that encircle and kill the infested parts, and provide habitat for insects.
Pot, a common slang name for cannabis, on a sign at a 2012 cannabis rights demonstration in New York City. More than 1,200 slang names have been identified for the dried leaves and flowers harvested from the cannabis plant for drug use. [1] This list is not exhaustive; it includes well-attested expressions.
This pathogen mainly affects and is most noticeable on the leaves of cherry trees. The most obvious symptom of this disease is the yellowing of leaves before they drop in the early spring. Infected leaves are filled with numerous black lesions that cover an obvious portion of the leaf. [5]
Leaves retain their yellow border from the initial chlorosis. Apothecia survive in the fallen plant debris over winter, releasing spores when the temperature is warm again. [ 5 ] The infection of Tar Spot is localized to the chlorotic areas on the leaves and is mostly a cosmetic issue, rather than an economically detrimental disease.
Traditionally refers to the leaves of hemp plants, or to a traditional Indian cannabis leaves tea preparation. [21] Bhang is culturally significant in India, and is not technically banned, as the Narcotic Drugs and Psychotropic Substances Act, 1985 , specifically does not outlaw using seeds and leaves of the cannabis plant, of which the common ...
Close up of a Cannabis plant. Cannabis (/ˈkænəbɪs/) is commonly known as marijuana or hemp and has two known strains: Cannabis sativa and Cannabis indica, both of which produce chemicals to deter herbivory. The chemical composition includes specialized terpenes and cannabinoids, mainly tetrahydrocannabinol (THC), and cannabidiol (CBD ...