29 September 2015

Rose Replant Disease Impacts Apples

Science has been applied to the long-observed phenomenon of rose replant issues.

There is a report by Dr. David Zlesak at http://www.rose.org/ - 
Dr. David Zlesak
"The mysterious ‘rose replant disease’ or ‘rose sickness’ has puzzled rose growers for years. Nothing specific has been identified as the cause of this phenomenon. When new roses are planted where old roses used to be, they may not grow as well as they would if they were planted in soil never planted with roses. Many suspect that key nutrients may be depleted in soils where roses have been grown for a long time, and as a result, the new roses do not get all the nutrition they need. Additionally, where roses have been grown for years without attention to good soil health, the soil’s structure and general physical properties may have declined — due to compaction and reduced organic matter. The soil may not effectively deliver oxygen, nutrition and water to the roots to support the vigorous growth of new roses."
.... "It sounds very promising that crop rotation and careful selection of the right non-rose species as an intercrop can dramatically reduce rose replant issues for commercial nurseries and avoid costly and toxic soil sterilization treatments."
Fascinating .... "After returning from the rose research symposium, I looked closely at areas of my garden in light of rose replant challenges and noticed something very interesting. In 2012, I expanded part of my rose garden, taking several feet of sod out to have enough room for the crop of new rose seedlings. This past summer the nicest looking seedlings typically have been in the part of the bed that was most recently in sod. As I look how I planted my family rows, part of each family is in the new bed and part of each family row extends into the older bed that has had roses growing continually since 2008."
Read the entire article at the link below.
David Zlesak (zlesak[at]rocketmail[dot]com), ‘Advances in Understanding Rose Replant Disease’, Winter 2014.Buckeye Rose Bulletin, Mark Miller (tmille3[at]columbus[dor]rr[dot]com), ed. Buckeye District Rose Society. Reprinted from the Fall 2013 Rose Hybridizer Association Newsletter.
Full article: http://www.rose.org/advances-in-understanding-rose-replant-disease/

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