Platina
Better berry size and berry shape of table grape
Composition

Foliar fertilizer (nitrogen N) based on
tryptophan, a plant specific amino acid

Different from other amino acid fertilizers


Single amino acid (no chain)

Very small molecule

Very fast uptake
Only tryptophan (50 g/l)
CH2
CH COOH
NH2
N
H
Different formulations !

Platina 50 : standard

Platina 33 : Netherlands 33 g/l

Platina 75 : Spain
Doses in this document
50 g/l
75 g/l
Platina 50 !
Conversion factors

1,0 l/ha Platina 50 = 1,5 l/ha Platina 33

1,0 l/ha Platina 50 = 0,67 l/ha Platina 75
Increasing the fruit size of table grapes
Fruit size of table grapes

For table grapes, fruit size is of big importance

Especially in seedless varieties, fruit size is often
insufficient

Stenopermocarpy  seed abortion  seedless grapes

Early seed abortion  less sink activity  fruit size 
Use of Platina on table grapes

Dose: 2 x 1,5 l/ha standard orchard

Application: ± 1 and 2 weeks after full bloom

Combine with a thinning treatment with GA3
(Gibb 3) during bloom
Trial results
Platina Germany 2007



LVWO Weinsberg
Varieties: Artemis and Palatina
Objects:
Object
Product
Dose
Time
Control
-
-
-
Platina
GA3
5 g/ha
Full bloom
+ Platina
2 x 1,5 l/ha
5 + 10 days after full bloom
Platina Germany 2007
30
Control
Platina
25
20
15
25,5
10
18,0
5
0
16,2
12,6
2,1
3,0
Fruit weight (g)
Fruit length (mm)
Fruit diameter (mm)
Platina gives bigger fruits and a higher fruit weight. This made the bunch
weight increase from 200 grams to 422 grams!
Platina Germany 2007
4
Fruit weight (g)
3
2
3,0
1
2,3
0
Control
Platina
Platina Greece
Platina leads to a stronger development of the vessels towards the grapes 
thicker fruit stalk  better water and nutrition uptake
 less detachment of grapes during handling and storage
Platina Spain 2011-2012



University of Almeria
Variety: Crimson seedless
Objects:
Object
Product
Dose
Time
Control
-
-
-
Platina
GA3
55,5 g/ha
7 + 14 days after full bloom
+ Platina
2 x 1,5 l/ha
7 + 14 days after full bloom
Platina Spain 2011
Object
Yield
(kg/plant)
Bunches
per plant
Bunch weight
(g)
Grapes
per bunch
Fruit weight
(g)
Control
32,9
56
587
112
5,23
Platina
38,7
67
576
107
5,44
Despite the higher number of bunches per plant, the grapes have a higher
fruit weight after Platina treatment
Platina Spain 2011
Object
Mid-harvest date
L
a
b
Control
06/09
40,5
2,64
7,84
Platina
01/09
39,8
4,40
6,64
In warm climates coloring of fruits often is a problem. The higher a-value
and the lower b-value indicate a better coloring of the grapes after Platina
treatment, which led to an earlier harvest
Platina Spain 2012
Object
Yield
(kg/plant)
Bunches
per plant
Bunch weight
(g)
Grapes
per bunch
Fruit weight
(g)
Control
37,4
62
590
121
4,87
Platina
42,2
62
660
116
5,66
Significantly higher fruit weight after treatment with Platina, so higher
bunch weight and higher yield
Platina Spain 2012
Object
Fruit length
(mm)
Fruit diameter
(mm)
L/D ratio
Control
24,4
17,7
1,38
Platina
26,4
18,3
1,44
After treatment with Platina the grapes are slightly thicker and significantly
longer  fruit shape is nicer and commercially more interesting
Platina Spain 2012
Object
Mid-harvest date
L
a
b
Control
16/09
38,0
5,3
7,3
Platina
12/09
35,9
7,2
5,5
Again better coloring and therefore earlier harvesting
Platina Spain 2012
Stalk diameter (mm)
4
3
2
3,77
2,99
1
0
Control
Platina
Clearly thicker fruit stalks, because of which the grapes have more growth
potential and show less detachment from the bunch after harvest
Advantages Platina on grapes

Bigger grapes

More attractive fruit shape

Better coloring

Stronger fruit stalk