Peach leaf curl and fungus infection on hydrangeas?

I've used the recommended spray but it still returns. I am on The Costa Blanca, can anyone help with a more permanent treatment?

Peach leaf curl and fungus infection on hydrangeas?
Disease Cycle. The fungus that causes peach leaf curl (Taphrina deformans) survives as spores in microscopic crevices on the tree. Spores from old infections lodge in loose bud scales and other tiny fissures, waiting for the next spring. Then, spores that are washed into buds or onto the first new leaves will cause infections if leaves stay wet and temperatures are between 50o and 70o F. Wet, cool springs keep peach growth slow, so new buds and leaves remain susceptible for a long time, and heavy leaf-curl will develop in untreated peaches. A warm spring, even if it is wet, won't produce nearly as much disease.



Treatment.



Leaf curl is relatively easy to prevent, even though the timing of the treatment is a little inconvenient. A fungicide spray applied in the autumn after at least 90% leaf-fall, or in the spring just prior to bud-swell, will generally stop leaf curl. If an orchard has been heavily diseased, making both fungicide applications may be necessary to deal with the large amount of inoculum. The fungicide applications should not be concentrated to more than 2X, to insure that the coverage is thorough. Fungicides need to penetrate the microscopic crevices that are protecting the fungal spores.



The most effective fungicides are chlorothalonil (Bravo) or copper compounds (Kocide, COCS, etc.). Ziram, lime sulfur or Bordeaux are useful but somewhat less effective. Check the label for rates and other use recommendations.



For the growing season when a leaf curl epidemic hits, the only treatment is to minimize stress on the infected trees. After infected leaves drop, peaches will generally produce new leaves. This new growth stresses the tree. In severe cases canker infections develop more easily and trees may fail to develop adequate winter hardiness. Severe leaf curl can ruin one season's crop, and may set the stage for more long-term problems related to stress. Minimize the stress by supplying some extra fertilizer, particularly nitrogen, irrigating, and removing the fruit load.