Content tagged "cultivar"

Choosing the Right Cultivar to Plant

Apples Updated: August 02, 2017

Several variables should be considered when selecting apple cultivars to plant. Important factors include cold hardiness (some cultivars will not survive...

Pollinating Apples

Apples Updated: August 17, 2013

Figure 1. Bumblebee on apple blossom (Alan R. Biggs, West Virginia University)Apples require cross-pollination for optimal fruit set and size. ...

What is a Strain of Apple?

Apples Updated: December 06, 2012

A strain is a known cultivar that differs in some way from the natural vegetative characteristics of the original cultivar. The difference may be in fruit...

Disease-Resistant Apple Cultivars

Apples Updated: November 07, 2012

There are more than 100 modern apple cultivars, and several dozen antique varieties, that have been selected in part for their disease resistance. They offer...

Parentage of Apple Cultivars

Apples Updated: March 07, 2012

 Nearly all apple cultivars have two parents – just like humans!  Apples have a genetic system that generally prohibits self-fertilization.  This...

Why are rootstocks used for apple trees?

Apples Updated: August 31, 2011

Apples do not come true from seed, so when we plant apple seeds, the plants that result are not the cultivar that we obtained the seeds from. If we take six...

Table of Juniper, Hawthorn, and Crab Apple Resistant to Rust Diseases

Apples Updated: August 30, 2011

 Cedar-apple rust is a fungus disease of apple and cedar and spends parts of its life cycle on each host. It is caused by Gymnosporangium...

U.S. Fruit Tree Nurseries

Apples Updated: August 29, 2011

Adams County Nursery Inc., 26 Nursery Rd., P.O. Box 108, Aspers, PA 17304 Nursery, 15935 S. Temperance Ave., Selma, CA...

I want to espalier an apple tree along a garage wall. What rootstock should I use?

Apples Updated: August 28, 2011

Espalier is a technique of pruning and training apples in two dimensions, usually against a flat surface such as a wall or fence. The rootstock that you...

How do rootstocks affect apple fruit size?

Apples Updated: August 28, 2011

Results from a number of apple rootstock trials in different regions of North America indicate that some rootstocks can influence fruit size. Trees on M.7,...

Why do nurseries use budding versus grafting?

Apples Updated: August 22, 2011

Budding is often used because a single scion bud is inserted into the rootstock to produce a new tree. Also, with budding, many trees can be produced from a...

How should I choose among dwarfing rootstocks for my apple orchard?

Apples Updated: August 22, 2011

Choosing the best dwarfing rootstock for your orchard will depend on multiple factors. Probably one of the most important is the cultivar that will be...

When should apple trees be budded?

Apples Updated: August 22, 2011

Budding time will depend on where you live and the type of budding technique you use. Traditional timing in the northern hemisphere above 36 degrees...

Which apple rootstocks are susceptible to fire blight?

Apples Updated: August 22, 2011

Consider the relative susceptibilities of the scion and rootstock to fire blight when establishing new orchards. There is considerable variation among apple...

What is blister spot, and how do I identify and manage the disease?

Apples Updated: August 22, 2011

Blister spot is a bacterial disease of apple fruit caused by Pseudomonas syringae pv. papulans. This disease is of economic importance mainly on the cultivar...

What is 'Golden Delicious' necrotic leaf blotch, and how do I identify and manage the disease?

Apples Updated: August 22, 2011

Necrotic leaf blotch (NLB) is a physiological disorder whose occurrence is related to air temperature, light intensity, and soil moisture. The cause of NLB...

International Fruit Tree Nurseries

Apples Updated: August 22, 2011

D&L Nursery, 75 Avenue Joxe, 49100 Angers, FranceJanssen Brothers Nurseries Limited, PO Box 2711 6030 aa Nederweert, HollandJos Morren Nurseries, Bosstraat...

U.S. Fruit Tree Rootstock Nurseries

Apples Updated: August 22, 2011

Brandt’s Fruit Trees, Inc., PO Box B, Parker, WA 98951 http://www.brandtsfruittrees.comBurchell Nursery, Inc., 4201 McHenry Ave., Modesto, CA 95356...

What is blue mold, and how do I identify and manage the disease?

Apples Updated: August 21, 2011

Blue mold is a fungus disease caused by Penicillium expansum. It is the most important postharvest decay of stored apples in the United States. The losses...

What apple cultivars are resistant or susceptible to bitter rot?

Apples Updated: August 21, 2011

Bitter rot is a fungus disease that causes fruit rot during the summer and preharvest period. The bitter rot fungi are almost worldwide in distribution and...

What apple rootstocks are commercially available?

Apples Updated: May 23, 2011

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.