Dying Apple Trees and Sudden Apple Decline (SAD) with Kari Peter

 Kari Peter, Ph.D of Penn State Fruit Research and Extension Centre, talks about Sudden Apple Decline (SAD) or Rapid Apple Decline, which has devastated orchards in Ontario, New York State, Washington and Pennsylvania.
 
Apple trees die for many reasons and diseases like fireblight can also spread quite rapidly. But this problem, which is called Sudden Apple Decline (SAD) or Rapid Apple Decline can be identified when the dying apple tree seems to be infected around its graft union. You might see the bark at the graft union peeling off. Then the problem moves up the tree, killing the tree, but the root stock will still be alive and well and unaffected by the disease.

The host of the Orchard People radio show and podcast is Susan Poizner of the fruit tree care education website http://www.orchardpeople.com.

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• (00:00) - Introduction to Sudden Apple Decline
• (01:06) - Guest Introduction: Dr. Kari Peter
• (01:34) - First Encounter with Sudden Apple Decline
• (02:37) - Symptoms and Initial Observations
• (03:31) - Investigating the Graft Union
• (04:26) - Understanding Rootstock and Scionwood
• (05:51) - Field Observations and Grower Reports
• (06:43) - Listener Questions and Expert Insights: Potential causes and cures
• (09:54) - Regional Meetings and Broader Impact
• (13:45) - Potential Causes and Research Directions
• (15:54) - Preventative Measures and Grower Advice
• (28:32) - Concluding Thoughts and Resources
• (42:44) - Final Remarks and Show Wrap-Up