Articles
Field testing Prunus rootstocks in South Carolina for peach tree short life and Armillaria tolerance
Article number
1366_8
Pages
69 – 74
Language
English
Abstract
Six peach rootstock trials were established in South Carolina between 2003 and 2017 to evaluate rootstock cultivars for resistance to Peach Tree Short Life (e.g., bacterial canker) and Armillaria (i.e., Desarmillaria tabescens) fungal root rot.
Twenty-eight rootstocks were evaluated on Peach Tree Short Life (PTSL) and/or Desarmillaria tabescens replant sites.
Species composition of the rootstocks included P. persica, P. americana, P. angustifolia, P. besseyi, P. cerasifera, P. davidiana, P. domestica, P. dulcis, P. insititia, P munsoniana, P. salicina, P. spinosa, P. tomentosa, and P. umbellata. Three rootstock trials were planted at a non-fumigated, severe PTSL replant site on Lakeland sand.
After four years across trials, Guardian®, Mr.S 2/5, Lovell, and P. munsoniana seedling had survival rates as high as 100, 100, 95 and 71%, respectively; whereas trees on Adesoto, Krymsk® 1, Empyrean® 1, Garnem, and P. americana seedling all died, and Krymsk® 86 and Controller 5 had only 13-20% survival.
On a fumigated replant Piedmont clay loam soil, Rootpac® 40 and MP-29 had 19% and 10% tree mortality, respectively from Pseudomonas canker (PTSL) after five years, while Guardian® and Lovell had no tree death.
Two other trials were planted within grower orchards on replant sites with a history of PTSL and Desarmillaria root rot.
In an 11-year-old trial, Guardian® survival was 68% with tree deaths due to root rot, while 4 P. munsoniana selections had survival rates of 22-41% with most tree loss due to PTSL and incompatibility.
At the other grower orchard, Guardian®, Lovell and MP-29 had negligible tree death from PTSL whereas Rootpac 20 and Rootpac R had significant tree losses from PTSL. However, Guardian® and Lovell began dying in year six from Desarmillaria tabescens, whereas MP-29 had no tree loss from Desarmillaria after 10 years.
In general, most European interspecific rootstocks had fair to poor survival on PTSL sites, in contrast to high survival on Guardian®, Lovell and MP-29 rootstocks.
Twenty-eight rootstocks were evaluated on Peach Tree Short Life (PTSL) and/or Desarmillaria tabescens replant sites.
Species composition of the rootstocks included P. persica, P. americana, P. angustifolia, P. besseyi, P. cerasifera, P. davidiana, P. domestica, P. dulcis, P. insititia, P munsoniana, P. salicina, P. spinosa, P. tomentosa, and P. umbellata. Three rootstock trials were planted at a non-fumigated, severe PTSL replant site on Lakeland sand.
After four years across trials, Guardian®, Mr.S 2/5, Lovell, and P. munsoniana seedling had survival rates as high as 100, 100, 95 and 71%, respectively; whereas trees on Adesoto, Krymsk® 1, Empyrean® 1, Garnem, and P. americana seedling all died, and Krymsk® 86 and Controller 5 had only 13-20% survival.
On a fumigated replant Piedmont clay loam soil, Rootpac® 40 and MP-29 had 19% and 10% tree mortality, respectively from Pseudomonas canker (PTSL) after five years, while Guardian® and Lovell had no tree death.
Two other trials were planted within grower orchards on replant sites with a history of PTSL and Desarmillaria root rot.
In an 11-year-old trial, Guardian® survival was 68% with tree deaths due to root rot, while 4 P. munsoniana selections had survival rates of 22-41% with most tree loss due to PTSL and incompatibility.
At the other grower orchard, Guardian®, Lovell and MP-29 had negligible tree death from PTSL whereas Rootpac 20 and Rootpac R had significant tree losses from PTSL. However, Guardian® and Lovell began dying in year six from Desarmillaria tabescens, whereas MP-29 had no tree loss from Desarmillaria after 10 years.
In general, most European interspecific rootstocks had fair to poor survival on PTSL sites, in contrast to high survival on Guardian®, Lovell and MP-29 rootstocks.
Authors
G.L. Reighard, D. Ouellette, I. Minas
Keywords
Prunus persica, Prunus hybrids, Pseudomonas syringae, Desarmillaria tabescens
Groups involved
- Division Plant-Environment Interactions in Field Systems
- Division Temperate Tree Fruits
- Division Temperate Tree Nuts
- Division Tropical and Subtropical Fruit and Nuts
- Division Horticulture for Development
- Division Vine and Berry Fruits
- Division Precision Horticulture and Engineering
- Commission Agroecology and Organic Farming Systems
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