There are many types affecting blight, most of which are fungal infections caused by damp, cool conditions.
These blight infections include the following varieties:
Alder—caused by the woolly alder aphid (a plant louse)
Apple (called apple canker)—affecting apple trees
Beet—affecting beet plants
Blister—affecting tea plants
Blister—affecting Scotch pines
Cane—affecting the canes of various bush fruits (e.g., raspberries, currants)
Chestnut (called chestnut canker or chestnut-bark disease)—affecting American chestnut trees
Coffee—affecting the coffee plant
Collar—affecting the trunks of pear and apple trees
Halo, halo spot, bean—affecting bean plants
Halo—affecting the leaves of oats and other grasses
Head—affecting the heads of cereals
Late—in which symptoms appear late in the growing season, especially a disease of solanaceous plants caused by the fungus Phytophthora infestans
Leaf—any that cause a browning and falling of the leaves of a plant
Peach—affecting trees bearing drupes
Potato, potato mold, potato disease, potato mildew, potato murrain—affecting potatoes
Rim—affecting tea plants
Spinach—affecting spinach plants
Spur—affecting raspberries
Stem—affecting the stems of plants
Stripe—affecting oats
Thread—affecting tropical woody plants (cocoa or tea or citrus)
Tomato, tomato yellows—affecting tomato plants
Twig—affecting the ends of twigs of woody plants
Walnut—affecting English walnut trees
Normally the shoots, along with other younger, rapidly growing cells of a plant are assaulted. The majority of blights come from microbial or fungus contaminations, however they can also happen from dryness. Fungal and microbial infections are all likely to happen in cold, damp circumstances. The majority of economically essential plants is vulnerable to a number of blights.
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