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  4. Timely Topics - Disease

Timely Topics - Disease

Results

anthracnose on turfgrass

Anthracnose on Turfgrass

Images of leaves from an apple tree with a case of apple scab

Apple Scab

An ash tree canopy with ash decline.

Ash Decline

 aster yellows symptoms on coneflower which shows the replacement of flowers by tufts of small, green, deformed leaves.

Aster Yellows

Image of bacterial spot symptoms in Pepper

Bacterial Spot on Pepper and Tomatoes

Shot hole symptoms caused by a bacterial pathogen in apricot leaves

Bacterial Spot on Stonefruit Trees

leaf with spots

Biotic vs. Abiotic - Distinguishing Disease Problems

A stonefruit tree with a case of black knot, showing long black galls on its branch.

Black Knot

Blossom end rot on tomato, with a brown leathery patch on the bottom of the fruit.

Blossom End Rot

brown patch on lawn

Brown Patch of Turfgrass

Leaf symptoms of necrosis (death) of the tissue along the veins.

Bur Oak Blight

crown dieback

Causes of Branch Dieback on Trees

Gymnosporangium juniperi-virginianae gall on cedar,Orange tendrils protrude from cedar foliage

Cedar-Apple Rust

Image of hawthorn rust on the top of a leaf

Cedar-Hawthorn Rust

phytotoxic reaction on cabbage by Tomasz AdobeStock

Chemical Injury to Garden Plants

Image of corn smut

Corn Smut

Image of a Euonymus with a case of crown gall

Crown Gall

symptoms (top) signs (bottom) of Cucurbit anthracnose

Cucurbit Anthracnose

Geranium leaves showing wilting and V-shaped lesions from infection by Xanthomonas campestris pv. pelargonii, cause of bacterial blight.

Cucurbit Bacterial Wilt

Image of a spruce tree with Cytospora canker

Cytospora Canker

Newly planted sycamore tree under stress

Decline of Newly Planted Trees

Image of black dots caused by the Sphaeropsis on a pine cone

Diplodia Tip Blight and Canker

Dollar Spot Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org

Dollar Spot

Image of Dothistroma on the needles of an Austrian Pine

Dothistroma Needle Blight

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Yard and Garden

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Ames, Iowa 50011

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Ames, Iowa 50011

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