Current projects


Identifying and Managing Sources of Quarantine Significant post-harvest diseases in Pacific Northwest apple and pear orchards

Manchurian-1 Manchurian-1


The TASC project will allow the replacement of the Manchurian crab apple as a pollinizer and reduce the risk of quarantine problems for exporting apples to China.
Desired and required characteristics for an alternative to Manchurian were identified as follows:
1. Winter hardy to USDA Zone 5 or 6
2. Tree Height — 10'−14'
3. Tree Shape — upright, columnar, narrow, oval
4. Growth Rate — moderately rapid growing
5. Cycle — no tendencies or only slight and manageable tendencies to alternate bear
6. Tree Management Requirements − minimal pruning to maintain consistent flowering
7. Flower — profuse, white, single or double (this still needs to be validated)
8. Bloom Time — compatible with early, mid and late blooming apple cultivars
9. Fruit — small, no interest in commercial value
10. Disease Resistance — Baseline: fireblight, mildew, scab
11. Pollen viability / sterility ratio — 50% or better viability

PI: Stefano Musacchi (WSU, WA)  |  Co-PI: Karen Lewis (WSU, WA), J. Schmidt and Sons Nursery (OR), Morton Arboretum (IL), USDA ARS Plant Genetics Resources Unit (Geneva, NY), Longenecker Horticultural Gardens (UW at Madison, WI), The Holden Arboretum (Kirtland, OH)

Collaborators: Sara Serra

Start date: 2014  |  End date:  2019

Source of funding: USDA: Technical Assistance for Specialty Crops (TASC)


Past projects

Relevant international projects: