susceptible cultivars host:www.caf.wvu.edu

Listing 1 - 10 from 11 for susceptible cultivars

Fruit Pathology - Disease Diagnostic Key
... cause net-like pattern of russetting on fruit. Fungus may appear on twigs of susceptible cultivars. POWDERY MILDEW (Podosphaera leucotricha). 16b. Foliage associated with a major branch or occasionally ... . The varieties Sunhigh, Afterglow, Collins, Merrill 49'er, RedGlobe, and Washington are very susceptible. BACTERIAL SPOT (Xanthomonas pruni) 10c. Leaves develop chlorotic spots, lines, and rings as ...
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Fruit Disease Focus - Minor Diseases of Apples - August, 1998
... cultivars. X-Spot I. Introduction: Although now uncommon, incidence of X-spot as high as 86 percent was reported on unprotected 'Golden Delicious' and 'Rome Beauty' fruit in 1950. Other susceptible cultivars ... . IV. Monitoring: Symptoms of this minor disease appear late in the season on susceptible cultivars such as 'Golden Delicious', 'Rome', 'Jonathan', 'Stayman Winesap' (photo 2-43), and 'York'. ...
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Fruit Pathology - Powdery Mildew
... , Kearneysville, W.Va. I. Introduction: Powdery mildew can be a persistent disease of susceptible apple cultivars throughout the mid-Atlantic region. It is the only fungal apple disease that is ... and a recurrent problem with chronic yield reductions in subsequent years. V. Management: Where mildew-susceptible cultivars are grown, include a mildewcide in the scab program to control both diseases. The ...
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Bitter Rot of Apple and Pear
... in low areas of the orchard where drying may be slower. 'Nittany' fruits are very susceptible to bitter rot and may provide an early indication of the disease. V. Management: Removal ... disease on susceptible cultivars (Table of effectiveness of apple fungicides). Removing newly infected fruit from trees during the growing season may also help reduce the rate of disease spread. Apple cultivars do not ...
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Comparative Anatomy and Host Response...
... Host Response of Two Peach Cultivars Inoculated with Leucostoma cincta and L. persoonii. Phytopathology 76:905-912. Stems of two-year-old peach cultivars, Candor (susceptible) and Sunhaven (relatively resistant), were ... samples, but only in one of nine inoculated samples. The results suggested that peach cultivars varied in their ability to establish anatomical barriers in bark and xylem and that ...
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Temporal Changes in the Infection Court After Wounding...
... peach cultivars to infection by L. persoonii. By calculating the number of days to maximum resistance for each cultivar, that is, the point when the infection court was no longer susceptible to infection, it was estimated that the infection court of the most susceptible cultivar would remain receptive to inoculum approximately 19 days ...
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White apple leafhopper/Rose leafhopper
... from peach, cherry, plum, and hawthorn in the second generation. The apple cultivars `Empire' and `Liberty' are relatively susceptible to WALH. Primary hosts of RLH include multiflora rose, and wild and cultivated ...
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Brown Rot - June, 1998
... . In most orchard situations, inoculum produced on early maturing cultivars fuels a continuing outbreak that affects late maturing cultivars. Insects (nitidulid beetles and honey bees) also can be ... the situation where overwintered mummies within the tree would be immediately adjacent to susceptible blossoms in the spring. Furthermore, removal of remaining fruit after final picking separates ...
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Fruit Disease Focus - April, 1998 - Apple Scab
... cultivars: Most of the major apple cultivars are susceptible to the fungus, although this varies somewhat (Table of apple cultivar susceptibility to V. inaequalis). Breeding programs to develop high quality disease-resistant apple cultivars ...
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Black Rot and White Rot of Apples
... for fruit rot infections. The most susceptible varieties to leaf spots are 'Rome', 'Jonathan', 'Stayman', and 'McIntosh'. Sports of 'Golden Delicious' and 'Delicious' are not as susceptible. If leaf spots are ... area is much firmer and is very similar to black rot infection. On certain apple cultivars, even with these criteria, it is difficult to determine which fungus initiated the infection. ...
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