Red Leaf Spotting in Holly May be Boron Deficiency
Greenhouse studies and field surveys were conducted in Oregon in an effort to identify what was causing red leaf spotting in holly production in the Pacific Northwest. The field surveys were conducted in 1960 and 1961 at multiple holly orchards in several different Oregon counties.
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January 1962 Vol. 6, Issue 1 Page 3
A.N. Roberts R.L. Ticknor O.C. Compton Horticulture Department Oregon State University, Corvallis, OR