Dormant Oil: Great treatment for scale on trees
December 16, 2013
Timing is everything! And now is the time to plan for applying eco-friendly dormant oil to fruit trees, shade trees, shrubs, roses, and hollies in January.
Why is dormant oil beneficial? It protects various trees and shrubs from insects and fungal diseases by suffocating overwintering pests such as aphids, leafhoppers, leafrollers, mealybugs, mites, scale, and tent caterpillars. In Hollies, Red Oak, Live Oak, Pecan, or Maple trees, it is highly effective against scale, a very common insect that survives through winter in tree cracks and fissures. Dormant oil is also great at warding off many fungal diseases such as black spot on roses.
When do we apply it and why? It is applied January through early-February, depending on temperatures, because that is when leaves have fallen and many trees and shrubs are in their dormant state. This is also the time of year it is least likely to harm beneficial insects. It also must be applied at the proper temperature so that it does not burn foliage of plants that do not drop their leaves. It is safe to use around birds and animals and does not harm reptiles. However, be sure ponds with fish are covered.
What is Dormant Oil? Most Dormant oils are mineral oil, derived from very refined petroleum oil. Impurities are removed that may be harmful to plants. It is then combined with an emulsifier so it can be mixed with water and applied to plants. Our dormant oil is approved by Organic Materials Review Institute (OMRI).
Dormant Oil is a safe, effective part of your annual overall landscape health management.