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Asked by abraham ·May 19, 2020 ·16.4k readers

KNF Treatment for Peach Leaf Curl

Interested in hearing from the KNF community if anyone has any treatments for Peach Leaf Curl or similar fungal pathogens. Season was progressing well but after some late rains in Northern California, the peach leaf curl took over the canopy of many of our trees. Is there any KNF recipes (foliar or soil applications) that can be used to alleviate the spread of this fungus? Thanks in advance!

peach leaf-curl fungal-pathogen

Top answer

From the KNF library

From the KNF library Drafted by Claude from Office Hours and the books · Sep 2026 · 6 sources

Drake's peach tree lost its fungal issue after he started KNF treatments, and fruit went from 24 lbs to 72 lbs. (Office Hours Ep. 92, 1:04:33)

For a similar problem on figs, Drake recommends spraying liquid IMO or an IMO4 tea made from soil microbes. (Office Hours Ep. 55, 11:54) Sulfur works, but it fights balance instead of restoring it. (Office Hours Ep. 55, 11:54)

Drake uses protectors (LAB) anytime the plant needs protection. (Office Hours Ep. 37, 41:44) For mildew and similar problems he applies them weekly or semi-weekly. (Office Hours Ep. 6, 18:55) On tomato blight, he says to use protectors early and often with a little soap, since OHN won't fix blight once it's there. (Office Hours Ep. 129, 31:18)

On the IMO question above: for a deciduous orchard that includes peaches, Drake starts by adding IMO1 from local forest to the existing spray or compost program. (Office Hours Ep. 6, 54:08)

The library has no peach leaf curl recipe and no peach dilution rates. It does not say whether spraying now will save this year's leaves.

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