conclusions from the working group on globular tree ... · núria banyuls, valentino bosco,...

Workshop on harmonized dose expression for the zonal evaluation of plant protection products in high growing crops

Vienna, 2016-10-18/20

Conclusions from the Working Group on Globular Tree Orchards (Citrus, Olives…)

Chair: Patricia ChuecaCo-chair: Antonio Miranda

Rapporteurs: Agustí Soler and Dario SterziSupport: Juan M. Cantus and Elena Gutiérrez

Núria Banyuls, Valentino Bosco, Charlotte Cornish-Bowden, Evangelos Karanasios, Véronique Mironet, Jean-Luc Rison, Kerstin Schlechter, Vlasta Zlof

CITRUS

CITRUS Citrus tree characteristics:

0

1

2

3

4

5

6

Altura de copa (m) Diámetro entre árboles (m)

Diámetro entre filas (m)

Parcela 1Parcela 2Parcela 3Parcela 4Parcela 5Parcela 6Parcela 7

Height (m) Diam. Along row(m)

Diam. Across row(m)

Orchard 1

Orchard 2

Orchard 3

Orchard 4

Orchard 5

Orchard 6

Orchard 7

CITRUS LWA versus Canopy volume

y = 0,1198x + 8216R² = 0,0819

0

2000

4000

6000

8000

10000

12000

14000

16000

0 5000 10000 15000 20000 25000 30000

LWA

(m3 /

ha)

Ellipsoid (m3 veg/ha)

CITRUS TRV versus Canopy volume

y = 1,0586x + 8141,9R² = 0,6507

0

5000

10000

15000

20000

25000

30000

35000

40000

0 5000 10000 15000 20000 25000 30000

TRV

(m3 /

ha)

Ellipsoid (m3 veg/ha)

CASE OF STUDY Citrus orchard characteristics:

*The tree shape was consider a ellipsoid

Treatment characteristics:

Orchard Crop Spacing(mxm)

Canopyheight(m)

Diam-cross(m)

Diam-lengh(m)

Shape tree*(m3 veg/ha)

TRV (m3/ha)

LWA(m2/ha)

1 Washington orange

5x4 1.5 4 4 6300 12000 6000

2 Washington orange

4x2 1.3 2 2 3400 6500 6500

Orchard Treatment

Prod. [] (g/hl) Spray vol. (L/ha)

Dose(kg/ha)

Dose(kg/10000 LWAha)

Dose(kg/10000 TRV ha)

Dose (kg/10000 m3 veg ha)

1 1 1 20 1200 2400 4000 2000 3800

1 2 1 30 1200 3600 6000 3000 5700

1 3 1 60 1200 7200 12000 6000 11500

2 4 1 20 1300 2600 4000 4000 7600

2 5 1 30 1300 3900 6000 6000 11500

2 6 1 60 1300 7800 12000 12000 22900

Main characteristics of the olive orchards in Spain

Olive orchard cultivation systems

Superintensive system Intensive system

2%* 24%*

* Data referred to the harvested area (AEMO, 2012)

Traditional system

89 m3

42 m3

50 m 76 % (AEMO, 2012)

Main characteristics of the olive orchards in Spain

Intensive system

• Plantation density: 204 ha-1

• Number of trunks: 1

• Average height: 3.91 m

• Average diameter: 3.92 m

• Average volume: 24.60 m3

1-trunk traditional

system• Plantation density: 100 ha-1

• Number of trunks: 1

• Average height: 4.52 m

• Average diameter: 4.56 m

• Average volume: 33.49 m3

Traditional system

• Plantation density: 69 ha-1

• Number of trunks: 2 – 4

• Average height: 4.58 m

• Average diameter: 6.34 m

• Average volume: 98.08 m3

Main characteristics of the olive orchards in Spain

GTOs: Key Conclusions• Starting point Kick-off for a WG on dose expression (& adjustment?) in

globular tree orchards (GTOs) – we are at an initial stage!

• Proposal for present & short-term approach Continue using product concentration, combined with rationalized (& harmonized) water rates

• Proposal for next season Development of scientific guidelines for modelling of water rates in GTOs.

• Proposal for mid-term Since validation is missing for proposed models in GTOs (LWA, TRV, GTV), proposal to dedicate 2 years to generate new trial data with harmonized study protocols. Independent analyses of anonymized trial data by crop experts. Final decision based on robustnessand practicality

GTOs: Proposals forTrial parameter inputs

• Measure both diameters in globular trees (canopy widths)

• Measure distance between trees in a row (spacing within row)

• Note actual water volume as well as theoretical water volume (crop-adapted water volume, e.g. 0,11-0,12 L/m3)

GTOs: Proposals forExcel Tool for Dose Conversions

• Replace “isolated” by “globular”• Introduce “globular diameter” measurements• Introduce possibility of cutting spray on crop gaps (electronic devices or

manual applications)• When relevant (e.g. citrus), introduce crop density as “crop factor” (CF)• Same tool for dose adjustment?

GTOs: Prospects

Dose = Concentration x Water Volume

g/hL

11g/m3 TRV

8L/m2 LWA

3L/m3 TRV

3g/m2 LWA

1GTV? GTV?

Workshop on harmonized dose expression for the zonal evaluation of plant protection products in high growing crops

Vienna, 2016-10-18/20

Conclusions from the Working Group on Globular Tree Orchards (Citrus, Olives…)

Chair: Patricia ChuecaCo-chair: Antonio Miranda

Rapporteurs: Agustí Soler and Dario SterziSupport: Juan M. Cantus and Elena Gutiérrez

Núria Banyuls, Valentino Bosco, Charlotte Cornish-Bowden, Evangelos Karanasios, Véronique Mironet, Jean-Luc Rison, Kerstin Schlechter, Vlasta Zlof