leaf spotting host:www.ext.vt.edu

Listing 1 - 5 from 5 for leaf spotting

Diagnosing Plant Problems
... caterpillars, slugs, beetles, grasshoppers), rolled leaves (leafroller), tunnels in between upper and lower leaf surfaces (leaf miners), holes in stems, branches or trunk; sections of tree dying; or premature ... injects toxins into the plant. The toxins can cause leaf spotting or stippling (aphids, leafhoppers, spider mites, other bugs), leaf distortion such as curling or puckering (or more commonly ...
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Entomosporium Leaf Spot of Photinia
... red tip," is the most popular photinia grown. All of these ornamentals are susceptible to leaf spotting caused by the fungus Entomosporium mespili. Other ornamentals reported to be hosts of the ... coccinea var. formosana), Indian hawthorn (Rhaphiolepis indica), and mountain ash (Sorbus sitchensis). Fig. 1. Leaf spots on photinia caused by Entomosporium mespili. (Photo by R. C. Lambe) Fig. 2. ...
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Foliar Diseases of Dogwood
... Angular, dark brown leaf spots with purplish margins, bordered by leaf veins, are typical of this disease (Fig. 7). Leaf spots first appear in early July in Virginia, but leaf spotting does not become severe until later in the summer. Symptoms caused by Septoria could be confused with those of Discula anthracnose; however, Septoria leaf spots are much ...
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Iris Leaf Spot
... Tech Publication Number: 450-600, Posted May 2000 Heterosporium leaf spot, or iris leaf spot, is the most common disease of iris in ... Leaf spotting is most conspicuous on the upper half of the leaves toward the end of the season after the blooming period. Fig. 1. Leaf ... and initiate new infections. Fungal spores (Fig. 2) produced in leaf spots during the growing season are spread by splashing rain. ...
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Septoria Leaf Spot of Tomato
... Septoria leaf spot of tomato, caused by the fungus Septoria lycopersici, is one of the most common and destructive diseases of tomato in Virginia. The fungus can cause severe leaf spotting and defoliation is common following severe infection. Heavy leaf loss during wet seasons leads to sunscalding of fruit and ...
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