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  1. Ambrosia Coloration in Maple Trees

    https://ohioline.osu.edu/factsheet/anr-0108

    shade trees. However, any number of insects and diseases affect the trees. Among the most important ... rubrum). Ambrosia colors are usually a combination of greens and browns. This discolored wood is called ... negundo). However, the ambrosia color in boxelder is red, instead of the greenish brown color found in red ...

  2. Pest Prep with the OSU Extension Office

    https://fairfield.osu.edu/events/pest-prep-osu-extension-office

    Ohio State University- Extension Ag & Natural Resource Educator, Carrie Brown, will educate ...

  3. Strawberry Leaf Diseases

    https://ohioline.osu.edu/factsheet/plpath-fru-35

    follow major veins progressing inward. The whole leaflet may turn brown. In severe cases, stolons, fruit ... Pathology Fungal diseases of the leaf may occur as soon as the first leaves unfold in early spring and ... continue until dormancy in the late fall. On highly susceptible varieties, these diseases can cause ...

  4. Brown Rot of Stone Fruits

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

    appear in the spring as the blossoms open. Diseased flowers wilt, turn brown, and may become covered with ... Pathology Brown rot is a common and destructive disease of peach and other stone fruits (plum, nectarine, ... from an infected peach. Figure 5. Brown rot disease cycle. We want to thank the New York State ...

  5. Phomopsis Leaf Blight and Fruit Rot of Strawberry

    https://ohioline.osu.edu/factsheet/plpath-fru-18

    Early symptoms are round, pink, water-soaked spots. Eventually, spots enlarge and turn brown (dark brown ... Department of Plant Pathology Phomopsis leaf blight is a common disease of strawberry in the eastern United ... appears to be relatively minor; however, incidence of the disease has been increasing. The disease can ...

  6. Anthracnose of Strawberry

    https://ohioline.osu.edu/factsheet/plpath-fru-16

    initially develop on fruit. The lesions eventually turn brown or dark-brown, are sunken, and enlarge within ... Department of Plant Pathology Anthracnose is an important disease of strawberry that can affect foliage, ... runners, crowns and fruit. The disease is caused by several species of fungi in the genus Colletotrichum: ...

  7. Powdery Mildew of Wheat

    https://ohioline.osu.edu/factsheet/plpath-cer-11

    later turning tan or brown. Small, black fruiting bodies (cleistothecia) develop on leaves as plants ... tritici, is the most common foliar disease of wheat in Ohio. It is most damaging in years with relatively ... late April or early May when wheat is in the joint to flag-leaf stage of development. This disease ...

  8. Grape Black Rot

    https://ohioline.osu.edu/factsheet/plpath-fru-24

    one of the most damaging diseases of grapes in Ohio and other northeastern states. The disease is ... rachises and cluster stems (peduncles) of grapes. If the disease is not managed early in the season, the ... on a grape leaf. Inset shows the dark pycnidia that can be seen in the center of each spot. Disease ...

  9. Downy Mildew of Blackberry

    https://ohioline.osu.edu/factsheet/plpath-fru-48

    irregular-shaped spots (lesions) (Figure 1). As the lesions age, they turn a reddish brown to purple color. Leaf ... turn brown and drop to the ground. Infections on the fruit, sepals, and pedicels also occur, but are ... blackberry (Rubus sp.) is a systemic disease caused by the fungal-like pathogen Peronospora sparsa. Nearly ...

  10. Hops Downy Mildew

    https://ohioline.osu.edu/factsheet/plpath-fru-49

    chlorotic (yellow) spots (Figure 2A) form and these spots eventually turn brown and have a crusty ... brown and have a crusty appearance. Infected flower clusters shrivel, turn brown and dry out. Cones ... destructive disease of hops (Humulus lupulus) in the Midwest and Northeastern United States. Downy mildew is ...

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