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  1. Apple Powdery Mildew

    https://ohioline.osu.edu/factsheet/plpath-fru-21

    cover the entire leaf. Diseased leaves become narrow, crinkled, stunted and brittle. By mid-summer, ... fungal fruiting bodies, but their importance in the disease cycle is probably minimal. The fungus spreads ... Leaves and blossoms from infected buds will be diseased when they open the next spring. Infected blossoms ...

  2. Necrotic Leaf Blotch of Golden Delicious Apples

    https://ohioline.osu.edu/factsheet/plpath-fru-12

    Pathology Necrotic leaf blotch is a common but minor disease that appears to be restricted to the Golden ... Delicious cultivar of apples and its sports. The disease is a physiological disorder and has been observed ... disorder varies from orchard to orchard and, more importantly, from year to year. The disease is fairly ...

  3. Spur Blight of Red Raspberries

    https://ohioline.osu.edu/factsheet/plpath-fru-28

    raspberries. Spur blight has been considered to be a serious disease of red raspberry; however, recent studies ... bearing side branches. In addition, berries produced on diseased canes may be dry, small, and seedy. ... body (perithecia). Leaflets sometimes become infected and show brown, wedge-shaped diseased areas, with ...

  4. Phytophthora Root Rot of Raspberry

    https://ohioline.osu.edu/factsheet/plpath-fru-14

    additional unidentified Phytophthora species have been implicated in this disease. The disease occurs on red, ... commonly on red raspberries. The disease has been reported to occur on blackberries in Kentucky. ... Phytophthora root rot can be an extremely destructive disease on susceptible cultivars where conditions favor ...

  5. Oak Wilt

    https://ohioline.osu.edu/factsheet/plpath-tree-02

    of Plant Pathology, The Ohio State University Oak wilt is a serious and often deadly vascular disease ... (bur, chinquapin, post, swamp white, and white oak) (Figure 1B) are more tolerant of the disease and may ... symptoms, so proper disease diagnosis is critical. Among these factors are drought, construction damage, and ...

  6. Red Stele Root Rot of Strawberry

    https://ohioline.osu.edu/factsheet/plpath-fru-34

    disease has become a serious problem facing strawberry production in the northern two-thirds of the United ... States. The disease is most destructive in heavy clay soils that are saturated with water during cool ... stele root rot. Susceptible variety on right, and resistant variety on left. Normally, the disease is ...

  7. Leaf Blotch Diseases of Wheat—Septoria tritici Blotch, Stagonospora nodorum Blotch and Tan Spot

    https://ohioline.osu.edu/factsheet/plpath-cer-07

    yellow leaf spot) are the three most frequently occurring leaf blotch diseases of wheat in Ohio. These ... diseases all have the potential to cause significant grain yield and quality losses if the environmental ... Fungi Causing Leaf Blotch Diseases Stagonospora blotch is caused by Parastagonospora nodorum ...

  8. Peach Canker

    https://ohioline.osu.edu/factsheet/plpath-fru-25

    Pathology Peach canker is a fungus disease common on apricot, prune, plum, and sweet cherry trees as well as ... on peach trees. The disease is common in peach orchards and is a frequent cause of limb dying and ... fungi that cause this disease enter the plant through wounds. Infection results in dead and weakened ...

  9. Brown Rot of Stone Fruits

    https://ohioline.osu.edu/factsheet/plpath-fru-29

    Pathology Brown rot is a common and destructive disease of peach and other stone fruits (plum, nectarine, ... twigs), and small branches. The disease is most important on fruits just before ripening, during and after ... harvest. Under favorable conditions for disease development, the entire crop can be completely rotted on ...

  10. Northern Corn Leaf Blight

    https://ohioline.osu.edu/factsheet/plpath-cer-10

    frequently occurring foliar diseases of corn in Ohio and the Midwest in general. Since the early 2000s, both ... the prevalence and severity of this disease have increased, but in most years plants only becomes ... severely diseased well after silking. During wet weather yield losses may be as high as 30-50% if the ...

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