The emulsion is not quite as effective but is safer to handle and less injurious to vegetation. The prepared spray should be applied to the infested bark at the rate of 1 gallon to 100 square feet of bark surface or until the surface is thoroughly wet. More of the emulsion is required to wet the surface than the oil solution. Spraying should not be done when the bark is wet, when the weather is rainy or when the temperature is below freezing. Stumps should not be sprayed because several insect predators of the beetle hibernate there.
Pesticides used improperly can be injurious to man, animals, and plants.
Follow the directions and heed all precautions on the labels. Apply pesticides so that they do not endanger humans, livestock crops, beneficial insects, fish, and wildlife. Do not apply pesticides when there is danger of drift, when honey bees or other pollinating insects are visiting plants, or if they may contaminate water or leave illegal residues. If your hands become contaminated with a pesticide, do not eat or drink until you have washed. In case a pesticide is swallowed or gets in the eyes, follow the first aid treatment given on the label and get prompt medical attention.