Some plant pests and fungal infections are hard to eradicate because they have shells or waxy coatings that protect them from traditional treatments. You can, however, smother tough-shelled scale, the eggs of many insects, and even mildew infections by coating them with oil. Store all garden treatments, such as this, in a capped and labeled bottle in a childproof cabinet.
- 1 tablespoon liquid use laundry or dishwasher detergent
- 1 cup vegetable oil
1. In a pint container, combine soap and oil to form a concentrate. Store it in a sealed, labeled container.
2. To apply, mix 1 or 2 teaspoons concentrate with 1 cup water in a spray bottle and apply to stems and both sides of plant leaves. Reapply after it rains.
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Vegetable oil can break down tough insect shells and coatings.
