Foliar, soil fertility programs help fight HLB in Felda grove

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

1.5 lbs.

Techmangam (manganese sulfate)

10.0 lbs.

Iron where needed

Fe -EDTA or DTPA 22 lbs./ton

Zinc sulfate

2.5 lbs.

Copper nutritional only

As needed

Sodium molybdate

0.75 (oz. dry)



13-0-44 (spray grade potassium nitrate)

7.5 lbs.




2.0 gal. (spring)



435 citrus spray oil

4.5 gal.



1 Renew (Plant Food Systems, Zellwood, FL) is a combination of products 14-7-8 w/K-Phite (1.0 pt./gal) + SAver (salicylate) on spring flush or 3-18-20 w/ K-Phite (1.0 pt./gal.) + Saver (salicylic acid) on summer and fall flush



Table 2. Total yield by season and variety from the Orange Hammock Grove in Hendry County. Text highlighted in green represents years HLB (citrus greening) was present in the grove.


Hamlin orange


Valencia orange


Wt. boxes

Lb. solids/box



Wt. boxes

Lb. solids/box


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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?

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