Horticultural Oil Insect Spray, 1 Pint

Horticultural Oil Insect Spray is a concentrated oil you mix with water and spray on the leaves and bark of trees to control mites, scale, aphids, whiteflies and other insects. Use it in the growing season or the dormant season.

16 fl. oz. (473 mL) concentrate

What insects does it control?

• Mites, such as spider mites
• Scale insects, such as magnolia scale and oystershell scale
• Galls
• Mealybugs
• Codling moth
• Red spiders
• Whiteflies
• Aphids
• Leaf rollers
• Treehoppers
• Other insects

How do I mix and use it?

• Growing season: The oil kills insects by blocking their pores and smothering them. Mix at 1:100. One bottle makes 50 liters (13 gallons) of growing-season spray.
• Dormant season: When trees and insects are inactive, it controls dormant insects and eggs. Mix at 1:50. One bottle makes 25 liters (6.5 gallons) of dormant-season spray.

It mixes quickly in water. Use it in non-freezing weather as a dormant spray, or at the lower recommended dosages as a summer spray on a wide variety of trees and shrubs.

Is it safe to use on leaves in summer?

Yes, for most plants. It is a highly refined mineral oil, much lighter than the old dormant-grade oils. It is also less viscous and evaporates more quickly from leaves and stems, which makes it much less phytotoxic (toxic to plants) and better suited to the growing season.

Which plants should I avoid spraying?

It is recommended for fruit trees, shade trees, shrubs, ornamentals and roses. It is not recommended for:

• Beech
• Butternut
• Colorado blue spruce
• Douglas fir
• Hickory
• Holly
• Sugar maple
• Japanese maple
• Walnut
• Ferns

We stock Horticultural Oil Insect Spray at TreeHelp.