Apple Scab Treatment

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I haven’t heard of scab causing entire crop loss. In my experience it scabs the fruit and may defoliate the tree earlier than normal in the fall.

Here’s links for a couple of spray guides:

Low-Impact Spray Schedule (2019 Edition)

Here is my “low impact” spray schedule, updated from this old version - Low Impact Spray Schedule (old version). This has been refined over about 15 years of successes and failures. My rough guide for low impact is no wide-spectrum poisons, which also means no PyGanic or rotenone. Spinosad is about as broad a poison that I use. I don’t personally draw the line at organic vs not, but this schedule is mostly organic and I will suggest some substitutions if you want to be 100% organic. My goal …

Low Spray Synthetic Short Version

This is to be used after you read my longer version. More materials are listed there. I thought it might be useful for a quick reference. Keep in mind that this is only fully tested in the northeast and as you go further south more protection and sprays tend to be needed, maybe further north, even less. 1st spray Horticultural oil and myclobutanil fungicide at highest rates. Usually best applied when trees have started growing but a couple days before blossoms begin to open. Generally be…