Q.Peaches with Brown Rot
Peaches with brown rot for the past two years. First of March – buds not open. How long do I use dormant oil? When and how to use sulfur spray? Fruit tree spray – when to start? Can I use sulfur spray and fruit tree spray at the same time or spray one wait two days spray the other? Thank you!
Certified GKH Gardening Expert
Dormant oil and sulfur spray are essentially used for the same thing, so you can choose one or the other to apply. To keep brown rot at bay, start treating the tree in early spring before the blossoms open and reapply the fungicide every 2-3 weeks while the tree is in blossom. Reapply the fungicide again when the fruit starts to ripen and changes color, which is normally about 3 weeks before harvest. Here is more information: https://www.gardeningknowhow.com/edible/fruits/peach/brown-rot-fungus.htm
