2021年4月2日 · Late winter and early spring, when the temperatures are barely above freezing, is the time to apply the best preventative for scale and mites: dormant oil. Dormant oil sprays are used on fruit trees before the buds begin to swell and suffocate insects and …

2025年2月3日 · Spraying horticultural oil on fruit trees during winter is one way to safeguard your future harvest without harming pollinators, predatory bugs, and wildlife. Most pollinators lie dormant as pupae or overwintering adults, while predatory …

Dormant oils are especially useful for treating overwintering eggs of insects that curl leaves in the spring (such as aphids), the overwintering eggs of tent caterpillars and leaf rollers, mites that overwinter on conifers, and scale nymphs and adults.

2025年2月2日 · Learn how to create your own dormant oil spray for fruit trees to combat pests and diseases naturally. This eco-friendly solution targets aphids, spider mites, and fungal spores, ensuring your trees are protected before the growing season.

Dormant oil is a natural pesticide that protects plants but not damage the fruit or environment. When prepared properly oil sprays control many pests that live through winter on tree trunks, twigs, and buds.

Once you understand why and how to spray your fruit trees, this will become an easy routine every dormant season. Choosing to spray your trees with both a dormant/horticultural oil AND liquid copper is key. This helps protect your trees fully against pests and diseases in the coming growing season.

2022年8月22日 · What is a dormant oil spray? Dormant oils are highly refined horticultural oils applied at a slightly higher concentration at bud break (early spring before buds start to swell). They control pests or eggs that overwinter mainly on deciduous woody ornamental trees, shrubs, and fruit trees. Also, they help with fungal diseases such as powdery ...

2023年11月21日 · Dormant oil sprays can control a variety of insect pests such as aphids, mealybug, thrips, whiteflies, adelgids, caterpillar eggs, leafhoppers, scale and mites. This control is more effective on young insects and less effective on more mature insects so timing and early intervention is key.

Dormant oils target pests that are found on plants during the dormant season. Late winter and early spring applications of dormant oils can be helpful for controlling overwintering insects and insect eggs in fruit trees and woody ornamentals.

2025年2月14日 · A dormant oil will kill mature insects that are hiding from the cold, as well as insect eggs that may have been laid inside of plants. Horticultural oils aren’t effective in freezing temperatures, so you should apply them at least 48 hours before and after a freeze.