Foliar, soil fertility programs help fight HLB in Felda grove

01/09/2013 08:00:00 AM
Bob Rouse, Maury Boyd and Tim Willis

Mean yield for Valencia the six years before HLB was 460 boxes per acre. After HLB, it has been 454 boxes per acre.

Production of 500 to 700 boxes per acre for Hamlin and 400 to 600 boxes per acre for Valencia make this among the top groves in Florida.

Production the past 13 years has remained steady, considering year-to-year variability in conditions.

Since HLB was introduced, production at the Orange Hammock grove has not decreased, according to production records.

Nutritional/psyllid management programs have given hope to citrus growers that they can remain profitable until a more sustainable solution can be found.

Ideally, a long-term solution to HLB would include genetic resistance. The cost of the Boyd program in the Orange Hammock grove is an economic question that must be addressed.

The current cost of the three foliar sprays as formulated and applied each year exceeds $600 per acre. This program is currently possible if product costs remain affordable, juice prices remain above $1.50 pound solids and high yields can be maintained.

Table 1. Products and amounts in 250 gal/acre of the Boyd Nutrient/SAR cocktail in 2012.

Foliar applied products

Amount/acre per application

Ground applied products


Serenade Max WP

2.0 lbs

N (Calcium nitrate)

216 lbs.


2.0 qts


43 lbs.

Di-Oxy Solv Organic (hydrogen peroxide)

2.0 qts.

K (MOP) & K-Mag

266 lbs.


10.0 gal.


8.6 lbs

Epsom salts (Magnesium sulfate)

7.5 lbs.

Boron w/herbicide boom annually

Prev 1 2 3 4 5 6 Next All

Comments (1) Leave a comment 

e-Mail (required)


characters left

Célia Malvas    
São Paulo - Brazil  |  September, 04, 2013 at 06:28 AM

Every time I read news about Maury Boyd's success I wonder to know how his program has been applied by others citrus growers in Florida. Are there other groves having the same success as Boyd's? If this program in good to sustain the crop in diseased trees, why Florida yields are decreasing year after year?

Feedback Form