PT  - JOURNAL ARTICLE
AU  - Kielbaso, J. James
AU  - Ottman, Kenneth
TI  - Manganese Deficiency — Contributory to Maple Decline?
AID  - 10.48044/jauf.1976.007
DP  - 1976 Feb 01
TA  - Arboriculture & Urban Forestry (AUF)
PG  - 27--32
VI  - 2
IP  - 2
4099  - http://auf.isa-arbor.com/content/2/2/27.short
4100  - http://auf.isa-arbor.com/content/2/2/27.full
AB  - 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 MnSO4 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.