Researchers examine nutrient costs for HLB-infected trees

03/21/2014 11:04:00 AM
Bob Rouse and Fritz Roka

1,316

4

KNO3

1,134

7

Micro+KNO3+SAR

1,116

9

Micro+ Macro +H3PO3+ SAR                           

1,107

1

Micro+Macro+H3PO3+SAR+H2O2

1,059

6

Macro+H3PO3+SAR

1,054

3

Micro + KNO3+H3PO3

1,004

5

SAR + KNO3

894

8

Macro +H3PO3

671

10

Control: liquid micros w/summer oil

468

Assumption: 150 trees per acre

Descriptions: KNO3 is potassium nitrate spray grade, Macro is macronutrients as liquid 3-18-20, 2Micros (MnSO4, ZnSO4, Na2MoO4, B (sodium borate),  H2O2 is hydrogen peroxide, H3PO3 is K-phite 7LP (Plant Food Systems, Zellwood, Fla.) phosphorous acid, SAR is SAver (Plant Food Systems) is potassium salicylate (salicylic acid), and Serenade ASO is Bacillus subtilis (Agraquest Inc., Davis, Calif.).

 

Figure 1. Yield in boxes per acre, fertilizer materials cost, and income by treatment.

click image to zoomHLB nutrient chart

Assumption: 150 trees per acre


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