Manganese Deficiency — Contributory to Maple Decline?    (View PDF)

J. James Kielbaso and Kenneth Ottman

Abstract: Studies of maple problems in Michigan beginning in 1970 have shown that the problem occurs on soils of high ,pH (7.1-8.0). Foliar treatment with various micronutrients initially showed the problem to be related to manganese deficiency. Spraying chlorotic trees can effect a significant, though not complete, positive color change. Treatment through systemic means shows promise, with MnSC>4 implantation superior to other methods researched to date. Results are not as quickly and markedly effective as similar treatment reported for pin oak chlorosis with iron. Maple manganese deficiency is described.

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https://doi.org/10.48044/jauf.1976.007