Peaches are a delectable fruit to humans and insects--which makes growing peaches without insecticides difficult to do. Rose Defense is an organic insecticide, fungicide and miticide that's designed for use on roses. It is also ideally suited for use on peach and other stone fruit trees. The active ingredient in Rose Defense is a 70-percent pure extract of neem oil, which coats any insects and their eggs, and inhibits their development and propagation. Neem oil also serves as a deterrent, dissuading new insects from landing or depositing their eggs on the peach tree.
Plan to spray your peach trees with Rose Defense in the early spring when temperatures have warmed to above 55 degrees Fahrenheit. Apply during the morning or late afternoon hours when the sun is weaker in strength and many insects are at rest.
Prepare a solution of Rose Defense and tepid water just before applying or no more than an hour or two ahead of time. Use a ratio of 1 oz. of Rose Defense for every 1 gallon of tepid water. Mix well in a garden sprayer and swirl or shake the container often to keep the oil and water mixed in the solution.
Spray the peach tree leaves, branches and buds with the diluted Rose Defense solution until just coated, ensuring you cover the underside of the leaves as well.
Repeat the application once every 2 weeks, to once per month during the growing season to control infestations or prevent them. Neem oil breaks down in sunshine and is easily washed away during rain, so light, frequent applications are most effective.