Flat Apple Disease
Apple flat
12 host plants · Unknown
Last updated
Your Red Delicious apples develop flattened fruit with shallow stem cavities, particularly on lower branches. Cherry rasp leaf virus, transmitted by dagger nematodes, causes this. The virus lives in orchard soil and weeds. Prevent by planting on uninfested sites and using virus-tested scion wood. Once established, the virus spreads very slowly.
The use of virus-tested (and found to be free of all known viruses) planting material is important for control. Avoid future orchard sites that test positive for the presence of the nematode.
Quick Reference
Agent Type
unknown
Causal Agent
Apple flat
Host Plants
12
Management
Cultural Controls
- The use of virus-tested (and found to be free of all known viruses) planting material is important for control. Avoid future orchard sites that test positive for the presence of the nematode.
Host Plants (12)
Malus 'Indian Magic' Indian Magic Crabapple Malus 'Prairifire' Prairifire Crabapple Malus 'Snowdrift' Snowdrift Crabapple Malus atrosanguinea Carmine Crabapple Malus brandywine Brandywine Crabapple Malus floribunda Japanese Flowering Crabapple Malus fusca Pacific Crabapple Malus hupehensis Tea Crabapple Malus pumila Apple Malus robusta Cherry, Crabapple Malus sargentii Sargent Crabapple, Pigmy Crabapple Malus transitoria Transitoria Crabapple
Sources & References
Data Maturity Baseline Extension data. Expert review underway.