The exceptionally warm weather (last) week (reaching at least 70 °F by mid-week) (was) perfect for applying dormant rate (2 – 3% ) horticultural oil to kill scale insects and overwintering aphid eggs and mite eggs on woody plants. Overwintering insect and egg respiration will rise with the warm temperatures making oil applications very effective.

UMD

Central Maryland, Research and Education Center

*You may have missed this particular prime opportunity, but this is good to know! Look for the next window!