Low residue sprout inhibition in potatoes Krt Demeulemeester, Kurt - - PowerPoint PPT Presentation

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Low residue sprout inhibition in potatoes Krt Demeulemeester, Kurt - - PowerPoint PPT Presentation

Dec 13, 2022 309 likes •591 views

Low residue sprout inhibition in potatoes Krt Demeulemeester, Kurt Cornelissen, Marie Demarcke Research Project RESKIA (2015-2017) Trial set-up 6 stores 4 boxes (750 kg/box) per store Ambient air ventilation + mechanical

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SLIDE 1

Low residue sprout inhibition in potatoes

Kürt Demeulemeester, Kurt Cornelissen, Marie Demarcke

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SLIDE 2

Research Project RESKIA (2015-2017)

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SLIDE 3

Trial set-up

  • 6 stores
  • 4 boxes (750 kg/box) per store
  • Ambient air ventilation + mechanical cooling
  • Sprout control:
  • electrofog
  • restrain generator
  • 7 varieties per box
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SLIDE 4

Tested sprout suppressants

Name Active ingredient 1 Gro-Stop Electro chloorpropham (636 g/l ) 2 Biox-M spearmint oil 100 % 3 Restrain ethylene 96% 4 Bio-024

  • range oil

5 1,4 Sight 1,4-dimethylnaphthalene (987,6 g/l) 6 SmartBlock 3-decen-2-one (784 g/l)

6,5 ° C

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SLIDE 5

Applications: dose & timing 2016-2017

16 Nov 23 Nov 14 Dec 21 Dec 4 Jan 11 Jan 17 Jan 25 Jan 8 Feb 15 Feb 8 Mar 20 Mar 21 Mar 29 Mar 19 Apr 3 May 10 May 18 May 30 May

Total

1 Bio-024 100 100 100 100 100 100 100 100 100 100 1000 2 SmartBlock 100 100 100 300 3 1,4Sight 20 20 20 20 20 100 4 Restrain 10 10 5 Biox-M 90 30 30 30 30 30 30 30 300 6 Gro-Stop Electro 18,8 12,6 12,6 12,6 56,6 Number of applications Total dose (product per ton potatoes) 1 Bio-024 10 1000 ml 2 SmartBlock 3 300 ml 3 1,4Sight 5 100 ml 4 Restrain continuous 10 ppm 5 Biox-M 8 300 ml 6 Gro-Stop Electro 4 56,6 ml

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SLIDE 6

Varieties

Industry Fresh market Double

Fontane Markies Innovator (MH) Charlotte Nicola Bintje

MH = maleic-hydrazide

8

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SLIDE 7

Assessments

Effectiveness

  • Sprouting
  • 1 February
  • 15 March
  • 1 May
  • 15 June
  • Shelf-life (fresh-market varieties)
  • Washing
  • Store 2 weeks @ 15°C
  • Sprouting +7d and +14d

Other parameters

  • Fry colour
  • Internal sprouting
  • Silver scurf
  • Black dot
  • Cooking quality
  • Weight loss
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SLIDE 8

1. No sprouts 2. White point 3. Biggest sprout < 2 mm 4. Biggest sprout 2 – 5 mm 5. Biggest sprout 5 – 10 mm 6. Biggest sprout > 10 mm

Sprouting index (1-6 )

Sprouting – scale

Only biggest sprout assessed

(white and brown apart)

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SLIDE 9

Sprouting index at unloading

2.2 1.9 2.2 2.4 2.3 1.8 2.2 2.9 2.8 2.8 3.0 2.9 2.6 3.0 3.3 3.2 3.3 3.2 2.9 2.4 3.2 3.5 3.4 3.8 3.4 3.0 2.5 3.4

Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola T1 T2 T3 T4 Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)

(All)

February 1st March 15th May 1st June 15th

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SLIDE 10

Sprouting index at unloading

2.5 1.9 2.2 2.7 2.8 2.2 2.6 3.1 2.7 3.0 3.3 3.2 2.9 3.1 3.1 2.6 3.0 3.2 2.9 2.7 2.9 3.4 3.1 3.4 3.3 3.2 2.9 3.1

Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola T1 T2 T3 T4 Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)

Gro-Stop

February 1st March 15th May 1st June 15th

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SLIDE 11

Sprouting index at unloading

2.5 2.2 2.3 2.4 3.0 1.9 2.7 3.9 3.7 3.7 3.6 4.0 3.4 4.0 4.8 4.6 4.2 4.0 4.5 4.2 4.9 4.4 4.4 4.3 3.8 4.2 4.0 4.6

Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola T1 T2 T3 T4 Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)

Bio-024

February 1st March 15th May 1st June 15th

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SLIDE 12

Sprouting index at unloading

2.4 2.1 2.2 2.5 2.2 1.8 2.0 3.6 3.4 3.0 3.2 3.2 2.9 3.3 4.0 3.7 3.6 3.4 3.6 2.5 3.4 4.2 3.8 4.1 3.6 3.8 2.3 3.9

Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola T1 T2 T3 T4 Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)

Biox-M

February 1st March 15th May 1st June 15th

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SLIDE 13

Sprouting index at unloading

2.7 2.0 2.6 2.8 2.8 1.9 2.8 3.5 3.2 3.4 3.7 3.1 2.8 3.7 4.3 4.4 4.6 4.3 2.8 2.8 4.5 4.3 4.7 5.3 4.4 3.2 2.6 4.4

Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola T1 T2 T3 T4 Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)

Restrain

February 1st March 15th May 1st June 15th

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SLIDE 14

Sprouting index at unloading

1.6 1.4 1.8 2.0 1.1 1.4 1.5 1.1 1.1 1.2 1.1 1.0 1.0 1.1 1.1 1.4 1.7 1.3 1.1 1.1 1.2 1.7 1.6 3.1 2.1 1.1 1.7 2.0

Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola T1 T2 T3 T4 Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)

Smartblock

February 1st March 15th May 1st June 15th

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SLIDE 15

Sprouting index at unloading

1.7 1.6 2.0 2.3 2.0 1.7 1.9 2.4 2.5 2.6 2.9 2.8 2.4 2.8 2.4 2.5 2.7 2.8 2.3 1.5 2.4 2.7 2.8 2.8 3.1 2.8 1.4 2.6

Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola T1 T2 T3 T4 Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)

1,4 Sight

February 1st March 15th May 1st June 15th

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SLIDE 16

Comparison June 2017 (after 8 months storage)

4.4 4.4 4.0 3.4 4.2 4.2 4.6 1.0 1.1 1.5 1.3 1.1 1.1 1.1 2.8 2.9 2.7 3.0 2.5 2.1 2.4 4.5 4.6 5.1 4.0 2.8 3.0 5.0 3.6 3.6 3.3 3.5 3.4 2.9 3.6 3.0 3.0 3.1 3.2 3.4 2.9 3.0

Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola Bintje Fontane Innovator Innovator_mh Markies Charlotte Nicola BIO 024 Smartblock 1,4 Sight Ethyleen Biox M Gro Stop Electro

Sprouts < 2 mm Sprouts 2-5mm Sprouts > 5mm Sprouting index (1-6)

Restrain

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SLIDE 17

Fry colour (0-6)

Varieties

2.0 3.0 4.0 Bintje Fontane Markies Innovator Innovator_mh 19/jun 8/mei 15/jan 1/feb

Products

2.0 3.0 4.0 Bio 024 SmartBlock 1,4 Sight Restrain Biox M Gro Stop 19/jun 8/mei 15/mrt 1/feb

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SLIDE 18

Internal sprouting (% tubers)

Varieties

2 4 Bintje Fontane Markies Innovator Innovator_mh Charlotte Nicola 19/jun 8/mei 15/mrt

Products

2 4 Bio 024 SmartBlock 1,4 Sight Restrain Biox M Gro Stop 19/jun 8/mei 15/mrt

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SLIDE 19

Skin diseases

Silver scurf Black dot

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Trial @ Thorembais (Pomuni)

1,4 Sight vs. CIPC 2016-2017

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Trial outline

Location

  • Wooden boxes
  • 2 cels 900 tonnes
  • Multiple varieties
  • Challenger
  • Noblesse
  • Fogging

Assessments

  • Sprouting before washing
  • Shelflife at 10°C and 18°C
  • Sprouting after 7, 14, 21 and 28 days
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Date Box A Box B 14 Nov Growstop Fog 300g/l 22 Nov 1,4 Sight 10 Jan 1,4 Sight 16 Jan Growstop Fog 300g/l Residue CIPC Challenger Noblesse 4 Jan 0,13 3,20 25 Jan 0,65 5,90

Fogging regime & residues

Dose: 20 ml/ton

Residue DMN Washed Peeled Challenger 25 Jan no no

  • 28 Jan (+ 3d)

yes no 0,76 1 Feb (+ 7d) yes no 0,51 23 Feb (+ 28d) yes no 0,23 23 Feb (+ 28d) yes yes 0,04

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SLIDE 23

Challenger - sprouting

1.0 2.0 3.0 4.0 5.0 6.0 5 jan 11 jan 19 jan 26 jan 2 feb 26 jan 2 feb 9 feb 16 feb 23 feb T1 T2 SPROUTING INDEX (1-6) Challenger - CIPC - 18°C Challenger - 1,4 Sight - 18°C Challenger - CIPC - 10°C Challenger - 1,4 Sight - 10°C

Fogging Mid January

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SLIDE 24

Noblesse- sprouting

1.0 2.0 3.0 4.0 5.0 6.0 5 jan 11 jan 19 jan 26 jan 2 feb 26 jan 2 feb 9 feb 16 feb 23 feb T1 T2 SPROUTING INDEX (1-6) Noblesse - CIPC - 18°C Noblesse - 1,4 Sight - 18°C Noblesse - CIPC - 10°C Noblesse - 1,4 Sight - 10°C

Fogging Mid January

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Conclusions

CIPC can be replaced for long term storage Shelf-Life

  • Alternatives work enough up to 7 days @ 15 °C without MH
  • Effect of interval between treatment and unloading

Quality not influenced by product except...

  • Internal germination (suppressant vs. inhibitor)
  • Fry colour (depending on variety x product)
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SLIDE 26

Acknowledgments

Partners Funding