susceptible cultivars

Listing 1 - 10 from 458 for susceptible cultivars

Apple Powdery Mildew, HYG-3001-94
... symptoms are not usually seen unless the disease has built up to high levels on susceptible cultivars. Diseased fruit has a fine network type surface blemish called russetting. Causal Organism and ... powdery mildew. Jonathan, Granny Smith, Mutsu (Crispin), Rome, Cortland, Baldwin, Monroe and Idared are very susceptible and should be avoided if powdery mildew is a problem. Most other varieties may ...
ohioline.osu.edu

Oil and Other Early Season Sprays for Apple and Pear Trees, HYG-1425-93
... is most effective for controlling eggs of European red mite. The mite eggs are most susceptible to control by oil when they are close to hatching. After the half-inch green ... a fungicide or a combination of fungicides is generally required to control apple scab on susceptible cultivars. On susceptible cultivars a fungicide is not required before half-inch green. At half inch green (as ...
ohioline.osu.edu

Verticillium Wilt of Strawberry, HYG-3012-95
... . Control Do not plant susceptible strawberry cultivars in soil where tomato, peppers, potato, eggplant, melons, okra, mint, brambles, stone fruits, chrysanthemums, rose or related susceptible crops have grown for ... resistant varieties is one of the most important control methods for this disease. Verticillium-susceptible cultivars may be grown in infested fields if soil fumigation is done as a ...
ohioline.osu.edu

Bacterial Crown Gall of Fruit Crops HYG-3301
... rubi, causes galls on the canes of brambles. All fruit crops grown in Ohio are susceptible. The disease is particularly destructive on brambles (raspberries and blackberries) and grapes. It can also ... the roots. Above ground or aerial galls may form on canes of brambles and highly susceptible cultivars of grape. Although they can occur, aerial galls are not common on fruit trees. In ...
ohioline.osu.edu

Phytophthora Root Rot of Raspberry, HYG-3207-98
... an extremely destructive disease on susceptible cultivars where conditions favor its development. Infected plants become weak and stunted and are particularly susceptible to winter injury; seriously infected ... to be susceptible. The cultivars 'Bristol,' 'Dundee,' and 'Jewel' appear to be moderately to highly resistant. Among red raspberry cultivars, none are immune to the disease, but cultivars do ...
ohioline.osu.edu

Leaf Diseases on Ornamental Trees and Shrubs, HYG-3044-96
... the lesions. In addition to the leaf yellowing and defoliation that can occur on particularly susceptible cultivars, black rot cankers can develop on stems over the years, especially on crabapples weakened by ...
ohioline.osu.edu

Powdery Mildews on Ornamental Plants, HYG-3047-96
... entire leaf on one or both sides. Young foliage and shoots may be particularly susceptible. Leaf curling and twisting may be noted before the fungus is noticed. Severe ... flowering on highly susceptible cultivars. Hosts Powdery mildew fungi infect almost all ornamental plants. They are commonly seen only on those plants more naturally susceptible to the disease. Susceptible woody plants include ...
ohioline.osu.edu

April Newsletter
... defoliate plants by mid-season. Control starts with growing cultivars resistant to black spot. Most garden catalogs will identify cultivars resistant to black spot and other rose diseases. For the ... solution. For those dedicated enough to follow a weekly fungicide spray program, black spot susceptible cultivars offer a challenge. Fungicide sprays should be used when conditions favor black spot, which ...
radicr.home.mindspring.com

OREP - Development of Transgenic Soybean with Cyst Nematode Resistance
... Many pathogenic races of SCN exist, with at least four in Ontario, and conventionally-bred cultivars of resistant soybean last usually less than three years before resistance is broken (Nieblack, ... There are few SCN-resistant cultivars suitable for southern regions of Canada, and where they are available, they are generally not as productive as the best susceptible cultivars on non-infested land ( ...
res2.agr.gc.ca

Fire Blight of Apples, Crabapples and Pears, HYG-3002-94
... family. Quince, crabapple, mountain ash, spirea, hawthorn, pyracantha, and cotoneaster are all susceptible. Cultivars within some of these species are resistant. Symptoms Blossom and twig blight ... . Table 1: Relative susceptibility of common apple and pear cultivars to Fire Blight Highly susceptible Moderately susceptible Moderately resistant Apple Beacon Dutchess Jonafree Cortland Empire Melrose ...
ohioline.osu.edu