THE NATIONAL AND INTERNATIONAL ROLES OF THE IR-2 VIRUS-FREE FRUIT TREE REPOSITORY
The IR-2 virus-free deciduous fruit tree repository began modestly in 1955 but since has sent virus-free propagating materials to 102 investigators in 34 states of the USA and 107 investigators in 37 other countries.
All Prunus, Malus and Pyrus cultivars are indexed across extensive indicator-hosts.
Concurrent varietal identifications and trueness-to-type determinations are made.
Thermotherapy of diseased cultivars at 37.7 C is done by two methods—direct exposure and tip grafting.
Tip grafting for virus elimination from Prunus is possible if alternating temperatures of 34 C and 37.7 C for 12 hours each are used instead of constant 37.7 C.
Fridlund, P.R. (1976). THE NATIONAL AND INTERNATIONAL ROLES OF THE IR-2 VIRUS-FREE FRUIT TREE REPOSITORY. Acta Hortic. 67, 83-86
DOI: 10.17660/ActaHortic.1976.67.7
https://doi.org/10.17660/ActaHortic.1976.67.7
DOI: 10.17660/ActaHortic.1976.67.7
https://doi.org/10.17660/ActaHortic.1976.67.7
67_7
83-86
- Division Temperate Tree Fruits
- Division Temperate Tree Nuts
- Division Vine and Berry Fruits
- Division Ornamental Plants
- Division Vegetables, Roots and Tubers
- Division Physiology and Plant-Environment Interactions of Horticultural Crops in Field Systems
- Division Protected Cultivation and Soilless Culture
- Division Postharvest and Quality Assurance
- Division Tropical and Subtropical Fruit and Nuts