There are a number of reasons why this might be happening; scientists do not know for certain.
Here are a few theories:
• cultural/environmental factors that effect pollination, flower fertilization and fruit set.
• foliage damaged by diseases (scab, for example) and/or insects (stink bug or curculio have been suggested)
• fruit drop can be heavier on young, vigorous trees
• rainfall, esp after a dry period can cause fruit drop
• some scientists think competition for water and nutrients causes fruit drop (are they getting enough?)
You might want to contact your local cooperative extension service (find it here: http://www.almanac.com/content/cooperative-extension-services ). These folks are quite knowledgeable and may have experience with this or know someone who has…and can provide more insight.
There are a number of reasons why this might be happening; scientists do not know for certain.
Here are a few theories:
• cultural/environmental factors that effect pollination, flower fertilization and fruit set.
• foliage damaged by diseases (scab, for example) and/or insects (stink bug or curculio have been suggested)
• fruit drop can be heavier on young, vigorous trees
• rainfall, esp after a dry period can cause fruit drop
• some scientists think competition for water and nutrients causes fruit drop (are they getting enough?)
You might want to contact your local cooperative extension service (find it here: http://www.almanac.com/content/cooperative-extension-services ). These folks are quite knowledgeable and may have experience with this or know someone who has…and can provide more insight.