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This is a list of diseases of hemp (Cannabis sativa). Bacterial diseases ... Black mildew Schiffnerula cannabis: Brown blight Alternaria alternata = Alternaria tenuis:
Brugmansia sanguinea. Brugmansia are large shrubs or small trees, with semi-woody, often many-branched trunks. They can reach heights of 3–11 m (10–36 ft). The leaves are alternately arranged along the stems, generally large, 10–30 cm (4–12 in) long and 4–18 cm (2–7 in) across, with an entire or coarsely toothed margin, and are often covered with fine hairs.
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.
From April to September, in the upper axils, 7.5 cm (3 in)–wide umbels of orange, yellow or red flowers 1.5 cm (1 ⁄ 2 in) wide appear. They each have five petals and five sepals. [ 4 ] It is uncertain if reddish flowers are due to soil mineral content, ecotype genetic differentiation, or both.
Blight is a rapid and complete chlorosis, browning, then death of plant tissues such as leaves, branches, twigs, or floral organs. [1] Accordingly, many diseases that primarily exhibit this symptom are called blights.
Cannabaceae is a small family of flowering plants, known as the hemp family.As now circumscribed, the family includes about 170 species grouped in about 11 genera, including Cannabis (hemp), Humulus and Celtis (hackberries).
Apocynum cannabinum grows up to 1 m (3 ft 3 in) tall. The stems are reddish and contain a milky latex.The leaves are opposite, simple, broad, and lanceolate, 7–15 cm (2 + 3 ⁄ 4 –6 in) long and 3–5 cm (1 + 1 ⁄ 4 –2 in) broad, entire, and smooth on top with white hairs on the underside.
The seeds are yellowish light brown to nearly black in color and nearly round, 10–12 mm (0.4–0.5 in) long and 8–9 mm (0.3–0.4 in) wide. The seeds are quite buoyant. In an experiment they floated in water for a year and a half. [6] The leaves, flowers, and seeds are toxic to humans, cats, dogs, and livestock. [3]