2018 Crop Protection Guide for Tree Fruits in Washington

Nutrient Sprays

Monday, November 19, 2018

Nutrient: Postharvest

See General Recommendations for guidelines on table use. Read all product labels carefully.
Apply after harvest and while leaves are still green and active


 Boron
deficiency
Boron
maintenance
Copper
deficiency
Zinc
deficiency
Zinc
maintenance
REIPHI

Product

Except where noted, rates are amount per acre (amount per 100 gallons in dilute sprays) 
basic zinc sulfate, dry, 50-52% Zn -- -- -- 14 lb (3.5 lb)6-12 lb (1.5-3 lb)  
basic zinc sulfate, liquid, 20-25% Zn -- -- -- See label (--) See label (--)  
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) -- -- --   
copper sulfate or basic copper sulfate, liquid, 4-14% Cu -- -- See label (--) -- --   
copper sulfate, dry, 25% Cu -- -- 4 lb (1 lb) -- --   
sodium borate, dry, 16.5-20.5% B 5-6 lb (1.25-1.5 lb)2.5-3 lb (0.75 lb) -- -- --   
zinc chelate or organic complex -- -- -- See label (--) See label (--)  
zinc sulfate, dry, 36% Zn -- -- -- 10-12 lb (2.5-3 lb)6-12 lb (1.5-3 lb)  
zinc sulfate, liquid, 10-12% zinc -- -- -- 7 gal (1.75 gal)2-4 gal (0.5-1 gal)  

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.

Copper deficiency: OK to tank-mix with postharvest zinc sulfate or basic zinc sulfate sprays. Follow manufacturer's label for labeled product rates.

Zinc deficiency: Do not apply before October 1. Do not apply on apricot. Follow manufacturer's label for labeled product rates. See precautions in text.

Zinc maintenance: Do not apply before daytime temperatures drop below 80F (usually October). Do not apply on apricot. Follow manufacturer's label for labeled product rates. See precautions in text.



 

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