What spray programme should I use for peach and nectarine trees to avoid leaf curl?
Hi Jai, this is a great question. Some peach and nectarine varieties are more susceptible to leaf curl than others. Dwarf stonefruit seem particularly susceptible to leaf curl. A winter spray programme of copper oxychloride and oil is always advantageous after winter pruning up until bud burst. This will give protection to the tree and also help control any overwintering fungal spores. Leaf curl is more prevalent some years than others, it mainly affects trees early in the season (spring) when it is cool and wet. Trees usually grow out of it as temperatures warm.
Make sure you pick up any diseased leaves and put them in the rubbish or burn them as this will help stop leaf curl spreading, it overwinters in the soil and in leaf litter. If the leaf litter is put into the compost then this is helping spread the disease the following season. Look for leaf curl resistant varieties if you are planting any more stone fruit.