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Published November 23, 2012, 12:00 AM

Hortiscope: Disease, not fertility issue, caused tulip sparsity

Q: I am working on the scale insects on my orange tree. I have been using Bonide systemic for four weeks and also cleaning off the new scales. How long does a systemic killer take to clear up the problem? Is there an advantage to wiping off the scales with rubbing alcohol or is water OK?

By: Don Kinzler, NDSU Extension Service

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