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.