We will be spraying peaches, pears, and apples this year. VA zone 6b. If I understand correctly, the best spray timing probably means spraying these at different times as they bloom at different times – or-- with a sticker (Nufilm I think is what we have) would it be ok to spray all at the same time? I feel a bit stupid asking this question, but I have sometimes seen on other websites mentions of spraying (esp. copper) at intervals from silver tip, bud break , to petal fall…am I missing something? Is dormant spray meant to be done several times, or not (assuming it didn’t rain immediately after the spray). My husband will be doing the spraying this year and I need to have it clear to tell him what and when. lol
If I am understanding your guide correctly, you do not use copper on any of the fruits listed, not even pears unless you’ve seen serious fireblight the year before? Last two years we used copper in dormant spray (only fireblight I saw was blossom strikes on apple variety I’ve now topworked); we purchased lime-sulfur for this year. I should add we did not spray in fall so I don’t know how that will affect what we need to do now. I have attempted to choose varieties listed as fireblight resistant based on reading on this forum and elsewhere-- both in pears and apples – but will admit I’m nervous about not using copper. I don’t want build up though.
Any advantage of copper on peaches vs. lime-sulfur except for leaf curl (which I’ve not experienced at this point)?
And, is pruning AFTER spraying concerning (i.e. open wounds not covered with spray)…the apple and pear trees will be pruned prior to spray but I was thinking of waiting till almost or in-bloom on the peaches because we are prone to late frosts. (despite that meaning more spray to use on wood we’d cut off later).