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Table 5 Economic analysis of SAR inducer treatment of citrus trees a

From: Evaluation of the control effect of SAR inducers against citrus Huanglongbing applied by foliar spray, soil drench or trunk injection

Year

Treatment

Material cost ($US/ha)

Application cost ($US/ha)

Picking & Transport cost ($US/ha)

Total cost ($US/ha)

Production total (kg/ha)

Average delivered-in price ($US/kg fruit)

Gross income ($US/ha)

Net income ($US/ha)

Added revenue ($US/ha)

2016

UTC

0.00

0.00

1598.10

1598.10

17,756.7

0.27

4794.31

3196.21

0.00

INA spray (0.5 g/tree)

705.65

333.58

1788.11

2827.34

19,867.9

0.27

5364.33

2536.99

− 659.22

SA spray (0.5 g/tree)

380.15

333.58

1716.86

2430.59

19,076.2

0.27

5150.57

2719.98

− 476.23

ASM injection (0.25 g/tree)

409.99

166.79

1954.37

2531.15

21,715.2

0.27

5863.10

3331.95

135.74

IMI injection (0.25 g/tree)

77.31

166.79

1991.69

2235.79

22,129.9

0.27

5975.07

3739.28

543.07

INA injection (0.25 g/tree)

155.51

166.79

2059.55

2381.85

22,883.9

0.27

6178.65

3796.80

600.59

SA injection (0.25 g/tree)

74.14

166.79

2032.41

2273.34

22,582.3

0.27

6097.22

3823.88

627.67

2018

UTC

0.00

0.00

1645.61

1645.61

18,284.5

0.29

5302.51

3656.90

0.00

INA spray (0.5 g/tree)

705.65

333.58

2059.55

3098.78

22,883.9

0.29

6636.33

3537.55

−119.35

SA spray (0.5 g/tree)

380.15

333.58

2147.77

2861.50

23,864.1

0.29

6920.59

4059.09

402.19

ASM injection (0.25 g/tree)

409.99

166.79

2110.45

2687.23

23,449.4

0.29

6800.33

4113.10

456.2

IMI injection (0.25 g/tree)

77.31

166.79

2052.77

2296.87

22,808.5

0.29

6614.47

4317.60

660.7

INA injection (0.25 g/tree)

155.51

166.79

2029.01

2351.31

22,544.6

0.29

6537.93

4186.62

529.72

SA injection (0.25 g/tree)

74.14

166.79

2117.23

2358.16

23,524.8

0.29

6822.19

4464.03

807.13

Cumulative

UTC

0.00

0.00

3243.71

3243.71

36,041.2

0.28

10,096.82

6853.11

0.00

INA spray (0.5 g/tree)

1411.30

667.16

3847.66

5926.12

42,751.8

0.28

12,000.66

6074.54

− 778.57

SA spray (0.5 g/tree)

760.30

667.16

3864.63

5292.09

42,940.3

0.28

12,071.16

6779.07

−74.04

ASM injection (0.25 g/tree)

819.98

333.58

4064.82

5218.38

45,164.6

0.28

12,663.43

7445.05

591.94

IMI injection (0.25 g/tree)

154.62

333.58

4044.46

4532.66

44,938.4

0.28

12,589.54

8056.88

1203.77

INA injection (0.25 g/tree)

311.02

333.58

4088.56

4733.16

45,428.5

0.28

12,716.58

7983.42

1130.31

SA injection (0.25 g/tree)

148.28

333.58

4149.64

4631.50

46,107.1

0.28

12,919.41

8287.91

1434.8

  1. aProduction was calculated as kg fruit per tree (the mean value per year was used), multiplied by the numbers (377) of trees per hectare. Treatment costs included the materials for SAR inducer applications and the costs of applying these treatments per crop season. Costs of materials were based on quotes from chemical supply companies in 2015 (ASM: $US 145.00 per 100 g; IMI: $US 27.34 per 100 g; INA: $US 55.00 per 100 g; SA: $US 141.10 per 500 g; Induce adjuvant: $US 7.39 per 1.0 L). Application costs for treatments were $US 68.92/ha for 934.7 L per ha (100 gal/acre) air-blast nutrient or pesticide applications. Picking & Transport costs were calculated on the basis of the mass of fruit harvested from each treatment and assuming $US 3.50 per 40.82 kg (Singerman and Futch 2018). Gross income was based on the average delivered-in price per year and the mean delivered-in price for cumulative estimates. Net income is the gross income minus input costs per hectare. Added revenue is the net income relative to untreated control