leaf surface host:www.ces.ncsu.edu

Listing 1 - 10 from 42 for leaf surface

Strawberry Diseases and their Control
... entire leaf dries up and dies. Similar spots may appear on leaf petioles and runners. Powdery mildew (Sphaerotheca macularis) causes infected leaflets to curl upwards along the margins. The lower leaf surface may turn ... and nematodes are associated. Normal strawberry roots are white, but naturally turn dark on the surface with age. The root system of a plant affected by black root rot is smaller ...
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Leaf Spot
... on the upper leaf surface of some cultivars, or it may be indistinct and confined to the lower leaf surface. Chlorotic spots with reddish borders are common on the leaf surface and may be ... or Trilogy (Neem 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 mowing (topping) has ...
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ODIN002 - Rose Diseases and Their Control in the Home Garden
... of roses in North Carolina. Circular black spots with a frayed margin on the upper leaf surface are characteristic. As the spots enlarge or increase in number, infected leaves turn yellow resulting ... disease. The characteristic white mold can occur on the surface of young leaves, shoots and flower buds. The disease causes leaf distortion but less leaf drop than black spot. Powdery mildew is usually ...
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Azalea Diseases in the Landscape
... of leaf rust first appear in mid-summer as circular yellow flecks about an 1/8 inch in diameter on the upper leaf surface. The fungus can be found forming spores in rust-colored pustules on the underside of the leaf below the yellow ... as peeling, sloughing, splitting or cracking bark often near the soil surface. Injured plants or branches may die in early spring, late ...
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TG07 - TURFGRASS DISEASE NOTE NO. 7 LONG-TERM TURF MANAGEMENT PRACTICES FOR PREVENTION OF TURF DISEASES
... be scheduled between the hours of 12:00 AM through 6:00 AM to reduce leaf surface wetness which is very attractive to turfgrass pathogens. Frequent, light irrigations are not recommended since ...
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Ginseng Disease Control
... of the disease from foliage to roots is essential. Phytophthora leaf blight symptoms begin as dark, water-soaked lesions on the leaf surface. The lesions eventually become papery thin, brown, and dry. The large brown, irregular shaped spots do not have the concentric ring pattern as seen in Alternaria leaf blight ...
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CornDIN002 - Southern Rust in Corn
... upper leaf surface (Figs. 1, and 2). Leaves, stalks, and the husks on ears may be infected. Southern rust typically sporulates profusely on the upper leaf surface and only sparsely on the lower leaf surface. ... control of gray leaf spot. Fungicide sprays on corn are not generally recommended for North Carolina. Applications of TILT or QUADRIS may prove beneficial when 3-5 % of the leaf surface have ...
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CornDIN003 - Gray Leaf Spot in Corn
... ] [Back to Corn Disease Notes] [Other Resources] General Information Gray leaf spot is caused by the fungus Cercospora zeae-maydis. ... leaf spot are rectangular lesions on the leaf surface 1 to 5 mm in width by as much as 6 cm long, that are usually restricted by small leaf ... the lesions may coalesce and the entire leaf may turn brown. Management Resistance to gray leaf spot is controlled by many genes ...
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Soybean Rust; Soybean Disease Information Note #8
... are raised on the leaf surface (Figures. 2-5). The lesions may have an angular appearance and be limited by leaf veins. Rust pustules may ... be observed as raised pustules on the under side of the leaf. The pustules are quite small (about the size of a pin ... Diseases, APS Press, St. Paul, MN). Figure 5. Enlarged view of leaf lesion of soybean rust containing pustules. Note the angular appearance of ...
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SOY003 - Frogeye Leaf Spot of Soybean
... Symptoms] [Management] [Back to Soybean Disease Notes] [Other Resources] General Information Frogeye leaf spot of soybean has been detected in the Piedmont and ... in diameter. Lesions are first visible on the upper surface of the leaf. These lesions are distinctive in that the brown spots ... seed treatment, plow under any crop residues on the soil surface, and the use of a foliar fungicide (Table 1) at ...
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