Rust disease infected my grape leaves. It's caused by rust fungus, as it has a powdery appearance on the lower leaves. We are having a lot of rain for these couple of months and this problem is probably triggered by a duration of water sitting on the leaves and soil, as well as the cool temperature.
Some experts suggested to give the plants a spray of sulfur fungicide. But I don't have sulfur at home. So I tried to spread rock ash on the soil. It has been sunny and hot these couple of days, hopefully the problem will go away.
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