When to spray apple tree for insects? - Knowledgebase Question

Lansing, MI (Zone 5B)
Avatar for jjlinderman
Question by jjlinderman
June 14, 2006
I have two apple trees in my yard. One is mature, moderate sized and healthy after an early spring pruning. The other is a dwarf ornamental, planted in late April and doing nicely. I assume I should be doing some kind of spraying for insects, but have never had these types of trees. The larger trees produced a nice crop of nice but somewhat wormy apples (I had just moved in.) When should I spray and what type of product should I use? Can I use the same product on both trees?

Thank you, J. Linderman

Answer from NGA
June 14, 2006
Apples can become affected by apple maggots, which tunnel throughout the flesh of the apple. These worms are the larvae of a sawfly, which is pretty hard to hit with an insecticide because they are so mobile. A good way of dealing with these pests is to hang sticky traps in your trees. You can put your trees on a spray program, but there's no guarantee you'll stop the damage because the applications need very specific timing; insects are active when temperatures suit them. For a complete spray schedule, contact your local Cooperative Extension office. Their publications will recommend products licensed for you local area. Best wishes with your apple trees!

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