Plant species

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leaf spots host:www.ces.ncsu.edu

Listing 1 - 10 from 45 for leaf spots

AD01 - ALFALFA DISEASE MANAGEMENT
... this disease. Leaf spots interfere with photosynthesis and cause premature defoliation. The most serious in our state are Lepto leaf spot, Stemphylium leaf spot, spring leaf spot and summer leaf spot. Rust ... four leaf spots are not available. Disease Identification Alfalfa mosaic (alfalfa mosaic virus): Infected plants have a light green or yellow color which may appear between the leaf veins. ...
www.ces.ncsu.edu

Bacterial blight of cotton
... leaf spot with a red to brown border (Figure 1). The angular appearance is due to restriction of the lesion by fine veins of the cotton leaf. Spots on infected leaves may spread along the major leaf veins. As disease progresses, leaf petioles and stems ... waxy crust containing the bacterium may form on old leaf spots or cankers. Bolls may become infected causing boll rot ...
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Leaf Spot
... Leaf Spot Leaf Diseases of Blueberry W.O. Cline, Extension Plant Pathologist Leaf spot diseases cause considerable damage each year to blueberries in North Carolina. Most damage is caused by anthracnose and septoria leaf spots ... Oil) in early season sprays actually increases leaf spots, probably by damaging the protective waxes on the leaf surface that normally block fungal penetration. Summer ...
www.ces.ncsu.edu

ODIN003 - Some Common Pecan Diseases and Their Control in North Carolina
... the shoot. Leaf symptoms first appear on the underside as tiny olive-brown lesions on the veins. Later, leaf symptoms appear on the upper surface as small olive-brown to black spots. Severely ... black spots or large, irregular yellow blotches on the leaves. Removing or plowing under old leaves helps reduce the infestation from one year to the next. Scab sprays usually will control leaf spots ...
www.ces.ncsu.edu

ODIN011 - Entomosporium Leaf Spot on Red Tip
... spots on both the upper and lower surfaces of young expanding leaves are the first symptoms of Entomosporium leaf spot. Numerous small spots may coalesce into large maroon blotches on heavily diseased leaves. Leaf spots ... of each leaf spot. Spots similar to those on the leaves can develop on leaf petioles and tender stem growth during prolonged periods of cool, wet weather. Low levels of leaf spot ...
www.ces.ncsu.edu

Azalea Diseases in the Landscape
... leaf rust. Resistant Balzac Red Letter Gibraltar Susceptible Brazil Homebush Clarice Oxydol Exbury Crimson Peach Sunset Highly Susceptible Klondyke Ilam Primrose Ilam Peachy Keen Rufus Llam Pink William Sunrise Leaf Spot Leaf spots may develop on older azalea leaves during fall and winter months causing premature leaf drop, but leaf spot usually causes ...
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Aucuba japonica
... condition. Aucubas grow best in shaded areas. Plants growing in exposed areas may develop black leaf spots or blotches. A dieback characterized by total decay of leaves, petioles, and branches often occurs ...
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TG03 - TURFGRASS DISEASES INFORMATION NOTE NO. 3 DISEASES OF TURFGRASSES ON ATHLETIC FIELDS IN NORTH CAROLINA -
... spots on leaves with masses of yellow to rust colored microscopic spores in the center of the spots. The number of spots may become so numerous that the entire leaf ... leaf spot occurs frequently on Kentucky bluegrass. The leaf spot symptoms are small dark spots on the leaves that increase in number and size and cause the leaves to die. Leaf spots ... of the fungi that cause leaf spots cause root and crown ...
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CANTALOUPE DISEASES AND THEIR CONTROL
... appears. Leaf spots 1/4 to 1/2 inch in diameter are recognized by their initial yellowish to orange color with diffuse borders. Later the spots turn brown and the entire leaf may become ... planted. Alternaria leafspot, caused by the fungus Alternaria cucumerina, is recognized by the dark brown leaf spots with concentric rings. It can be controlled with fungicides (see Table 1). Resistant varieties ...
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SOY003 - Frogeye Leaf Spot of Soybean
... spots which vary in size from less than 1 mm to 5 mm in diameter. Lesions are first visible on the upper surface of the leaf. These lesions are distinctive in that the brown spots are surrounded by a narrow red ... contain minute dark spots. Smaller lesions may coalesce to form larger, irregular spots on leaves. During a wet year, symptoms of Frogeye leaf spot ...
www.ces.ncsu.edu