White root rot, caused by the fungus Scytinostroma galactinum (formerly Corticium galactinum), has been known as a parasite of apple trees for many years and is widely distributed (Canada to Texas and westward to the Pacific coast, Europe, West Indies, and Japan). It occurs in both bearing and non-bearing apple orchards. Other hosts include a wide variety of woody plants, ornamental shrubs, and herbaceous perennials, including white pine, ash, peach, blackberry, dewberry, Japanese wineberry, dogwood, sumac, white campion, holly, …
Apple Mosaic Virus
Apple mosaic virus is one of the oldest known and most widespread apple viruses. The same virus can cause line pattern symptoms in plum and rose mosaic disease. Apple mosaic virus is related to Prunus necrotic ring spot virus.
Apple trees infected with apple mosaic virus develop pale to bright cream spots on spring leaves as they expand (fig. 1). These spots may become necrotic after exposure to summer sun and heat. Most commercial cultivars are affected, but severity of …
U.S. Fruit Tree Nurseries
Adams County Nursery Inc., 26 Nursery Rd., P.O. Box 108, Aspers, PA 17304 http://www.acnursery.com/
Agri-Sun Nursery, 15935 S. Temperance Ave., Selma, CA 93662
Banning Orchards and Nursery, 4000 Grant Rd., East Wenatchee, WA 98802
Boyer Nursery & Orchards Inc., 405 Boyer Nursery Rd., Biglerville, PA 17307 http://www.boyernurseries.com/
Brandt’s Fruit Trees Inc., P.O. Box B, Parker, WA 98939 http://brandtsfruittrees.com/
Burchell Nursery Inc., 12000 State Highway 120, Oakdale, CA 95361 http://www.burchellnursery.com/
Cameron Nursery, 1261 Ringold Rd., P.O. Box 300, Eltopia, WA 99330-0300 …
International Fruit Tree Nurseries
D&L Nursery, 75 Avenue Joxe, 49100 Angers, France
Janssen Brothers Nurseries Limited, PO Box 2711 6030 aa Nederweert, Holland
Jos Morren Nurseries, Bosstraat 85-85 3545, Halen, Belgium
Nakajima Tenkoen Co., No. 34, 1-Chome Nakajima dori, Higashine City, Yamagata Perf. Japan 999-37
Schrama Nursery, Prof. Zuurlaan 10, 8256 PE, Biddinghuizen, Holland
Star Fruits, Les Genets D’or, No. 14, 84430 Mondragon, France
Viveros Requinoa, Victoria Subercaseaux No. 323, Santiago, Chile
Wiel Willems, Zuidwesterringweg 5-II, 8308 PC Nagele, Holland
As Cooperative Extension educators, …
U.S. Fruit Tree Rootstock Nurseries
Brandt’s Fruit Trees, Inc., PO Box B, Parker, WA 98951 http://www.brandtsfruittrees.com
Burchell Nursery, Inc., 4201 McHenry Ave., Modesto, CA 95356 http://www.burchellnursery.com/
Cameron Nursery, 1261 Ringold Rd., PO Box 300, Eltopia, WA 99330-0300
Copenhaven Farms Nursery, 12990 SW Copenhaven Rd., Gaston, OR 97119 http://www.copenhavenfarms.com/
Cummins Nursery, 18 Glass Factory Bay Rd., Geneva, NY 14456 http://www.cumminsnursery.com/
Grootendorst Nurseries, Lakeside, MI 49116
Four Mile, 27027 South Hwy. 170, Canby, OR 97013 http://www.fourmile.com/
Lawyer Nursery, Inc., 950 Highway 200 West, Plains, MT 59859 http://www.lawyernursery.com/…
Apple Scab
Apple scab is a fungus disease caused by Venturia inaequalis. It is of major economic importance and, if not controlled, can cause extensive losses (70% or greater) where humid, cool weather occurs during the spring months. Losses result directly from fruit or pedicel infections or indirectly from repeated defoliation, which can reduce tree growth and yield.
Symptoms
Apple scab lesions occur on leaves, petioles, blossoms, sepals, fruit, pedicels, and less frequently, on young shoots and bud scales. The first lesions …
Thread Blight of Apple
Thread blight is a fungus disease caused by Corticium stevensii. Primarily, the disease is a problem in poorly managed orchards in the southeastern United States.
Thread blight symptoms are noticeable in early summer. Leaves wilt and turn brown (fig. 1), usually on the interior or shaded portions of the tree. Dead, curled leaves cling to blighted branches, frequently mid-branch, with unaffected leaves remaining on both sides of the diseased area (fig. 2). In well-managed orchards, the disease usually does not …
White Rot of Apple
White rot is often referred to as Botryosphaeria rot or Bot rot and is caused by Botryosphaeria dothidea, a serious fungal pathogen of apple wood and fruit. The fungus causing white rot is ubiquitous in nature, occurring on a wide variety of woody plants, including birch, chestnut, peach, and blueberry. The canker phase of the pathogen can cause considerable loss in many parts of the South, Midwest, and Northeast. Fruit rot infection is most common in areas of the southeastern …
Wood Rots in Apple Trees
Wood-rotting fungi cause losses over longer periods of time than most other apple diseases. Losses result mainly from breakage of branches and trunks due to a decline in the structural integrity of the wood. Fungal pathogens that colonize wood alter its structural integrity through enzymatic digestion of wood cell wall components. Some of the same fungi that cause wood rot can cause dieback as well.
The two most common symptoms of wood rot are the breakage of limbs or main …
Stool bed
A plant or group of plants of a specific clone or rootstock to be multiplied by mound layering.
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