🍄Fungal diseasesSevere
Brown Rot
Risk near you, next 48h
See whether your local forecast favours this disease right now.
When it strikes
Temperature
18–28°C
Humidity
≥85%
Leaf wetness
Required
Season
Spring, Summer
About
Brown rot (Monilinia species) is the most damaging disease of stone fruit — peaches, plums, cherries and apricots — rotting blossoms and fruit in warm, humid weather near harvest.
Symptoms
Blossoms wilt and turn brown (blossom blight); fruit develops expanding brown firm rot covered with tan spore tufts; mummified fruit clings to the tree over winter.
Organic Treatment
Remove mummies and infected twigs, thin fruit to prevent contact, and apply sulfur from bloom through harvest in wet weather.
Chemical Treatment
Propiconazole, myclobutanil, or fenbuconazole at bloom and again as fruit ripens.
Prevention
Prune for airflow, remove all mummified fruit, control fruit-wounding insects, and harvest promptly without bruising.