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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.
Septoria are ascomycete pycnidia-producing fungi that cause numerous leaf spot diseases on field crops, forages and many vegetables including tomatoes which are known to contract Septoria musiva from nearby cottonwood trees, and is responsible for yield losses.
Septoria lycopersici infects the tomato leaves via the stomata and also by direct penetration of epidermal cells. [3] Symptoms generally include circular or angular lesions most commonly found on the older, lower leaves of the plant. [1] The lesions are generally 2–5 mm in diameter and have a greyish center with brown margins.
Common Deuteromycetes that cause leaf spot disease: [7] [8] [9] Deuteromycetes 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
Internal brown spot = heat necrosis: Oxygen deficiency of tuber accompanying high soil temperature Jelly end rot: Carbohydrate translocation due to second growth Physiological leaf roll: Response to adverse environment Psyllid yellows: Toxic saliva of the potato (tomato) psyllid, Paratrioza cockerelli: Shatter bruise: Mechanical damage to tuber ...
Bacterial spot: Xanthomonas campestris pv. vesicatoria: Bacterial stem rot and fruit rot Erwinia carotovora subsp. carotovora: Bacterial wilt: Ralstonia solanacearum: Pith necrosis Pseudomonas corrugata: Syringae leaf spot Pseudomonas syringae pv. syringae: Aster yellows Ca. Phytoplasma asteris Tomato big bud Ca. Phytoplasma sp.; may be ...
Septoria cucurbitacearum Scientific classification Domain: Eukaryota Kingdom: Fungi Division: Ascomycota Class: Dothideomycetes Order: Capnodiales Family: Mycosphaerellaceae Genus: Septoria Species: S. cucurbitacearum Binomial name Septoria cucurbitacearum Sacc. (1876) Septoria cucurbitacearum is a fungal plant pathogen infecting cucurbits. Symptoms of Septoria leaf spot are similar on all the ...
Septoria malagutii is a fungal plant pathogen infecting potatoes. [3] The casual fungal pathogen is a deuteromycete and therefore has no true sexual stage. As a result, Septoria produces pycnidia, an asexual flask shaped fruiting body, on the leaves of potato and other tuber-bearing spp. causing small black to brown necrotic lesions ranging in ...