low residue sprout inhibition in potatoes · no sprouts 2. white point 3. biggest sprout < 2 mm...
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Low residue sprout inhibition in potatoes
Kürt 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 cooling• Sprout control:
• electrofog• restrain generator
• 7 varieties per box
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 orange oil
5 1,4 Sight 1,4-dimethylnaphthalene (987,6 g/l)
6 SmartBlock 3-decen-2-one (784 g/l)
6,5 ° C
Applications: dose & timing2016-2017
16 N
ov
23 N
ov
14 D
ec
21 D
ec
4 Ja
n
11 J
an
17 J
an
25 J
an
8 Fe
b
15 F
eb
8 M
ar
20 M
ar
21 M
ar
29 M
ar
19 A
pr
3 M
ay
10 M
ay
18 M
ay
30 M
ay
Tota
l
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 ml2 SmartBlock 3 300 ml3 1,4Sight 5 100 ml4 Restrain continuous 10 ppm5 Biox-M 8 300 ml6 Gro-Stop Electro 4 56,6 ml
Varieties
Industry Fresh market Double
Fontane Markies Innovator(MH)
Charlotte Nicola Bintje
MH = maleic-hydrazide
8
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
1. No sprouts2. White point3. Biggest sprout < 2 mm4. Biggest sprout 2 – 5 mm5. Biggest sprout 5 – 10 mm6. Biggest sprout > 10 mm
Sprouting index (1-6 )
Sprouting – scale
Only biggest sprout assessed(white and brown apart)
Sprouting index at unloading
2.21.9
2.22.4 2.3
1.82.2
2.9 2.8 2.83.0 2.9
2.63.0
3.3 3.2 3.3 3.22.9
2.4
3.23.5 3.4
3.8
3.43.0
2.5
3.4
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
T1 T2 T3 T4
Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)
(All)
February 1st March 15th May 1st June 15th
Sprouting index at unloading
2.5
1.92.2
2.7 2.8
2.22.6
3.12.7
3.03.3 3.2
2.93.1 3.1
2.63.0
3.22.9
2.72.9
3.43.1
3.43.3 3.2
2.93.1
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
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
Sprouting index at unloading
2.52.2 2.3 2.4
3.0
1.9
2.7
3.93.7 3.7 3.6
4.0
3.4
4.0
4.84.6
4.24.0
4.54.2
4.9
4.4 4.4 4.3
3.8
4.24.0
4.6
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
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
Sprouting index at unloading
2.42.1 2.2
2.52.2
1.8 2.0
3.63.4
3.03.2 3.2
2.93.3
4.03.7 3.6
3.43.6
2.5
3.4
4.23.8
4.1
3.63.8
2.3
3.9
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
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
Sprouting index at unloading
2.7
2.0
2.62.8 2.8
1.9
2.8
3.53.2
3.43.7
3.1
2.8
3.7
4.3 4.4 4.64.3
2.8 2.8
4.5 4.34.7
5.3
4.4
3.2
2.6
4.4
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
T1 T2 T3 T4
Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)
Restrain
February 1st March 15th May 1st June 15th
Sprouting index at unloading
1.61.4
1.82.0
1.11.4 1.5
1.1 1.1 1.2 1.1 1.0 1.0 1.1 1.11.4
1.71.3
1.1 1.1 1.2
1.7 1.6
3.1
2.1
1.1
1.72.0
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
T1 T2 T3 T4
Sprouts < 2mm (%) Sprouts 2-5mm (%) Sprouts > 5mm (%) Sprouting index (1-6)
Smartblock
February 1st March 15th May 1st June 15th
Sprouting index at unloading
1.7 1.62.0
2.32.0
1.71.9
2.4 2.5 2.62.9 2.8
2.42.8
2.4 2.5 2.7 2.8
2.3
1.5
2.42.7 2.8 2.8
3.12.8
1.4
2.6
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
Bint
je
Font
ane
Inno
vato
r
Inno
vato
r_m
h
Mar
kies
Cha
rlotte
Nic
ola
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
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
1.51.3
1.1 1.1 1.1
2.8 2.92.7
3.0
2.5
2.12.4
4.5 4.6
5.1
4.0
2.83.0
5.0
3.6 3.63.3
3.5 3.4
2.9
3.6
3.0 3.0 3.1 3.23.4
2.93.0
Bint
jeFo
ntan
eIn
nova
tor
Inno
vato
r_m
hM
arki
esC
harlo
tteN
icol
aBi
ntje
Font
ane
Inno
vato
rIn
nova
tor_
mh
Mar
kies
Cha
rlotte
Nic
ola
Bint
jeFo
ntan
eIn
nova
tor
Inno
vato
r_m
hM
arki
esC
harlo
tteN
icol
aBi
ntje
Font
ane
Inno
vato
rIn
nova
tor_
mh
Mar
kies
Cha
rlotte
Nic
ola
Bint
jeFo
ntan
eIn
nova
tor
Inno
vato
r_m
hM
arki
esC
harlo
tteN
icol
aBi
ntje
Font
ane
Inno
vato
rIn
nova
tor_
mh
Mar
kies
Cha
rlotte
Nic
ola
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
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
Internal sprouting (% tubers)
Varieties
0 2 4
Bintje
Fontane
Markies
Innovator
Innovator_mh
Charlotte
Nicola
19/jun 8/mei 15/mrt
Products
0 2 4
Bio 024
SmartBlock
1,4 Sight
Restrain
Biox M
Gro Stop
19/jun 8/mei 15/mrt
Skin diseases
Silver scurf Black dot
Trial @ Thorembais(Pomuni)
1,4 Sight vs. CIPC
2016-2017
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
Date Box A Box B
14 Nov Growstop Fog300g/l
22 Nov 1,4 Sight
10 Jan 1,4 Sight
16 Jan Growstop Fog300g/l
ResidueCIPC
Challenger Noblesse
4 Jan 0,13 3,2025 Jan 0,65 5,90
Fogging regime & residues
Dose: 20 ml/ton
ResidueDMN
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
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
SPR
OU
TIN
G IN
DEX
(1-6
)
Challenger - CIPC - 18°C Challenger - 1,4 Sight - 18°CChallenger - CIPC - 10°C Challenger - 1,4 Sight - 10°C
Fogging Mid January
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
SPR
OU
TIN
G IN
DEX
(1-6
)
Noblesse - CIPC - 18°C Noblesse - 1,4 Sight - 18°CNoblesse - CIPC - 10°C Noblesse - 1,4 Sight - 10°C
Fogging Mid January
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)
Acknowledgments
Partners
Funding
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