2018 Crop Protection Guide for Tree Fruits in Washington

Nutrient Sprays

Monday, February 18, 2019

Nutrient: Prepink/Pink

See General Recommendations for guidelines on table use. Read all product labels carefully.



Except where noted, rates are amount per acre (amount per 100 gallons in dilute sprays) 
boric acid liquid, 10% B 1 gal (1 qt)2 qt (1 pt)  
boric acid, dry, 17% B 6 lb (1.5 lb)3 lb (0.75 lb)  
sodium borate, dry, 16.5-20.5% B 5-6 lb (1.25-1.5 lb)2.5-3 lb (0.75 lb)  

Boron deficiency: Apply amount equivalent to 1.0 pound actual B per acre. See text.

Boron maintenance: Apply amount equivalent to 0.5 pound actual B per acre. See text.


Tree Fruit Research & Extension Center, 1100 N Western Ave, Washington State University, Wenatchee WA 98801, 509-663-8181, Contact Us