During the dormant season, usually late winter, horticultural oil targets overwintering eggs and adult insects that are resting on the bark. Horticultural oil serves as the cornerstone of a scale IPM program, used to reduce the initial population density.
Harnessing Natural Predators and Systemic Treatments for Scale Insect Control
It is essential to conduct a small patch test on a single branch and wait 48 hours before treating the entire plant. The goal is to create a thin, continuous film of oil, but avoid heavy runoff that could clog plant stomata.
Effective against a wide range of other pests, including aphids and mites. Applying horticultural oil during the heat of the day or during drought stress can cause irreversible damage to plant tissue.
Harnessing Natural Predators and Systemic Treatments for Scale Insect Control
For many growers, the visible armor of these pests feels impossible to penetrate with standard sprays. Understanding the Scale Insect Threat Scale insects fall into two primary categories: armored and soft.
More About Horticultural oil for scale insects
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