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Septoria cannabis is a species of plant pathogen from the genus Septoria that causes the disease commonly known as Septoria leaf spot. Early symptoms of infection are concentric white lesions on the vegetative leaves of cannabis plants, followed by chlorosis and necrosis of the leaf until it is ultimately overcome by disease and all living cells are then killed.
ASTM D8441/D8441M defines the IICPS as the silhouette of a cannabis leaf inside an ANSI Z535 and ISO 3864 compliant black-bordered yellow warning triangle. All dimensions of the symbol and the leaf silhouette (a novel design by David and Eli Nathan) are defined in ASTM D8441/D8441M.
Fungal diseases; Anthracnose Colletotrichum coccodes = Colletotrichum atramentarium = Colletotrichum dematium: Black dot disease Epicoccum nigrum = Epicoccum purpurascens: Black mildew Schiffnerula cannabis: Brown blight Alternaria alternata = Alternaria tenuis: Brown leaf spot and stem canker Ascochyta spp. Ascochyta prasadii Phoma spp ...
Cannabis also has a long history of being used for medicinal purposes, and as a recreational drug known by several slang terms, such as marijuana, pot or weed. Various cannabis strains have been bred, often selectively to produce high or low levels of tetrahydrocannabinol (THC), a cannabinoid and the plant's principal psychoactive constituent.
English: Wild marijuana (Cannabis sativa var. ruderalis Janisch.; syn.: Cannabis ruderalis Janisch.), top of female plant. Habitat: along roadside at the edge of upland deciduous forest. Habitat: along roadside at the edge of upland deciduous forest.
When the Farm Bill was signed into law in 2018, hemp — defined as “cannabis and derivatives of cannabis” with “no more than 0.3% THC on a dry weight basis" — was removed from the ...
The flowers of Cannabis sativa plants are most often either male or female, but, only plants displaying female pistils can be or turn hermaphrodite. Males can never become hermaphrodites. [ 3 ] It is a short-day flowering plant, with staminate (male) plants usually taller and less robust than pistillate (female or male) plants.
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.