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Cause and Host Alternaria: Small water-soaked lesions, maturing into sunken and brown spots with or without a yellow halo. May show concentric rings with purple margins. Necrotic tissue may fall out to appear shot-holed. Leaf spot on many plants and crops. Septoria: Small brown spots, that turns light tan to white in the centre. Leaf spot on ...
Clathrus ruber is a species of fungus in the family Phallaceae, and the type species of the genus Clathrus.It is commonly known as the latticed stinkhorn, the basket stinkhorn, or the red cage, alluding to the striking fruit bodies that are shaped somewhat like a round or oval hollow sphere with interlaced or latticed branches.
The bracts vary in shape from being long and thin like a blade of grass to being shaped like the blade of a trowel and are located under the stems that attach the flowers to the main stem of the raceme (the pedicels). Each bract is 5–10 millimeters long and 2–10 millimeters wide with a smooth surface (glabrous) like the leaves and can be ...
Secondary or summer spores called conidia form in whitish patches on the undersides of leaves in tiny, concave fruiting bodies called acervuli. These conidia are horn-shaped and have hydrophilic outer cell walls that make them easily miscible in water. When spread during rain or by wind they can cause new leaf infections. [9]
Dianthus armeria is a species of open and periodically disturbed sites. It is normally an annual but can be biennial or a short-lived perennial. New leaf rosettes form at the base of old plants from buds located on their roots, demonstrating that this species is in fact a short-lived perennial and has a life-span of less than two and a half years. [6]
Snow mold is a type of fungus and a turf disease that damages or kills grass after snow melts, typically in late winter. [1] Its damage is usually concentrated in circles three to twelve inches in diameter, although yards may have many of these circles, sometimes to the point at which it becomes hard to differentiate between different circles.
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Boerhavia erecta plants can survive considerable damage from grazing and fire because their stems produce perennating buds near the ground surface.. Stems of B. erecta typically grow to about 60 centimetres (24 in) tall and 3–5 millimetres (0.12–0.20 in) across.