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Sudden Oak Death (aka Ramorum blight)
https://ohioline.osu.edu/factsheet/plpath-tree-05
blight) is a disease caused by the oomycete pathogen Phytophthora ramorum that was discovered in ... central-coastal California in 1995. This pathogen had been known to cause disease in nurseries and gardens since ... Sporangia of P. ramorum. Photo by UC Berkeley. The disease causes extensive mortality on tanoak ...
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Black Knot of Plums and Cherries
https://ohioline.osu.edu/factsheet/plpath-fru-31
Pathology Black knot of plums and cherries is a widespread and serious disease throughout the United States. ... Black knot is a common disease in Ohio on wild plums and cherries and in home orchards where pruning and ... twigs. The disease becomes progressively worse during each growing season and unless effective control ...
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Ohio’s Natural Enemies: Lacewings
https://ohioline.osu.edu/factsheet/ent-72
of lacewings commonly found in Ohio: green lacewings (Family Chrysopidae) and brown lacewings (Family ... Brown lacewings are often brown to gray in color with hairy bodies, and are often confused with moths. ... Brown lacewings, however, may provide valuable pest management services as larvae and adults. Photo ...
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Orange Rust of Brambles
https://ohioline.osu.edu/factsheet/plpath-fru-30
fungus Arthuriomyces peckianus. Orange rust is the most important of several rust diseases that attack ... the canes are stunted. As the disease develops, the edges and lower surface of infected leaves (Figure ... and bright orange (Figure 2C). This bright orange, rusty appearance is what gives the disease its ...
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20 Questions on Plant Diagnosis
https://ohioline.osu.edu/factsheet/plpath-gen-3
study of plant disease including the reasons why plants get sick and how to control or manage healthy ... colors ranging from spun gold to reddish brown, followed by leaf drop. Many a bald cypress has felt the ... bite of the saw from new homeowners who notice a completely brown-leaved tree in their new landscape in ...
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Plants Get Sick Too!
https://ohioline.osu.edu/factsheet/plpath-gen-1
An Introduction to Plant Diseases PLPATH-GEN-1 Agriculture and Natural Resources 02/01/2017 Sarah ... study of plant disease including the reasons why plants get sick and how to control or manage healthy ... plants. Why Worry About Plant Diseases? Figure 1. Injury: Ice damage. The weight of the ice causes the ...
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White Pine Blister Rust on Currants and Gooseberries
https://ohioline.osu.edu/factsheet/HYG-3205
Plant Pathology White pine blister rust is not a serious disease of currants and gooseberries; however, ... it is a very serious disease of white pines (Pinus strobus). Currants and gooseberries serve as an ... suppress and control White Pine Blister Rust Disease is as follows: The European black currant, Ribes ...
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Cherry Leaf Spot
https://ohioline.osu.edu/factsheet/plpath-fru-40
Pathology Cherry leaf spot is one of the most serious diseases of both sweet and sour cherries in the ... Midwest. The disease mainly affects the leaves, but lesions may also appear on fruit, petioles and fruit ... stems (pedicels). Diseased leaves drop prematurely, and severely affected trees may be defoliated by ...
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Growing Onions in the Garden
https://ohioline.osu.edu/factsheet/hyg-1616
are small, thin insects that can be hard to see without a hand lens. Adult thrips are yellow to brown ... location for numerous years. Disease Management Botrytis leaf blight is a fungus caused by Botrytis ... white spots will appear on the onion leaves, expand, and cause the leaf tips to brown and eventually the ...
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Hot + Wet + Humid Weather = Disease
https://turfdisease.osu.edu/news/hot-wet-humid-weather-disease
ryegrass were diagnosed with brown patch. Tall fescue lawns that have the disease this early in the season ... Joe Rimelspach- June 2, 2010 Brown patch Lawns – In central Ohio brown patch starting to develop ... of the problem or that are located in areas prone to brown patch; over watered, shaded, wet, poor air ...