Hortiscope: Disease, not fertility issue, caused tulip sparsityQ: 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