Print This Page

Dormant Oil

Long-standing, organic, winter treatment for scale and other over-wintering insects.  Petrolium-based and will kill beneficial insects, so use sparingly.  Spray dormant oil at temperatures between 40 and 80 degrees.  It works by smothering the over-wintering.  Effective against scale, aphids, spider mites, and others. 

  Search Library Topics      Search Newspaper Columns