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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.
Phytophthora infestans is an oomycete or water mold, a fungus-like microorganism that causes the serious potato and tomato disease known as late blight or potato blight. Early blight , caused by Alternaria solani , is also often called "potato blight".
Thorny stem blight Tunstallia aculeata. Thread blight Marasmius tenuissimus. Twig blight Patellaria theae. Twig dieback, stem canker [2] [1] Macrophoma theicola [1] Velvet blight: Septobasidium bogoriense Septobasidium pilosum Septobasidium theae. Violet root rot Sphaerostilbe repens. White root rot Rigidoporus microporus = Rigidoporus lignosus ...
The most common mode of transmitting the blight is by the introduction of asymptomatic plants, or plants treated with fungicide (which can mask the disease) to unaffected areas. [13] Warm and humid conditions facilitate its spread. [14] The fungus does not need a wound to infect a plant, but it does require high humidity or free water. [15]
P. ramorum also infects a great number of other plant species, significantly woody ornamentals such as Rhododendron, Viburnum, and Pieris, causing foliar symptoms known as ramorum dieback or ramorum blight. Such plants can act as a source of inoculum for new infections, with the pathogen producing spores that can be transmitted by rainsplash ...
Phomopsis blight of juniper is a foliar disease discovered in 1917 [1] caused by the fungal pathogen Phomopsis juniperovora. The fungus infects new growth of juniper trees or shrubs, i.e. the seedlings or young shoots of mature trees.
Rhizoctonia foliar blight, crown and root rot Rhizoctonia solani: Rhizopus root rot Rhizopus arrhizus Rhizopus stolonifer. Rust Uromyces betae: Sclerotinia crown & root rot Sclerotinia sclerotiorum: Seedling rust Puccinia subnitens: Slime molds Physarum cinereum: Southern blight (Sclerotium root rot and stem rot) Sclerotium rolfsii Athelia ...
Phomopsis obscurans is a common fungus found in strawberry plants, which causes the disease of leaf blight. Common symptoms caused by the pathogen begin as small circular reddish-purple spots and enlarge to form V-shaped lesions that follow the vasculature of the plant's leaves.