I have used Phyton 27 (previous version of 35) for decades, for bacterial soft rot on Iris. Found it to be the only thing that worked for me on Pine red ring needle blight which needs a different Copper salt than the usual stuff for needle cast. Phyton is also systemic. Looks like the 35 moves faster so it can be used on fruit trees. I will check out when my liter of 27 runs out in 10 years as I usually spray 2 doses of 1/2 strength(2x 1/2 strength does not discolor iris foliage but full strength does) and if I remember full strength is 1 to 1.5 teaspoons/ gallon