Crop manual: Impatiens walleriana ImaraÂŽ
CuSo technical Team 2018
Classification: PUBLIC
Impatiens walleriana Imara®
Lead time Imara 12 cm pot
Imara®
2
Habit
Pinching
Garden height
Pot size
Sales period
Spreading
No
20 -25 cm
pack / 12
March - July
Calendar week 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 P F F Scheduling from a P F F 480/264 tray for a 12 cm pot at an average daily P F F temperature (ADT) of P F F 19°C P F F
Classification: PUBLIC
Remarks
N.A
Lead time Imara 12 cm pot
Series
• • • •
Start with a complete balanced fertilizer schedule. (Crop manual) Avoid high Ec levels. Drip Ec =1.8. with a good balance between elements. A good Ec in the pots gives dark and strong plants with healthy roots. Avoid low phosphor levels > 0.5mmol/L. Consider phosphite fertilizers, potassium phosphite fertilizer has a positive impact on Impatiens health. Impatiens walleriana Culture guideline
IDMR at optimum average daily temperature Weeks 1 2 3 4 5 6 7 8 9 10 11 12 handling P S F F F temp D/N (warm culture) 18-20°C temp D/N (cool culture) 14-16°C Light no special requirements 2 Shading > 750 W/m Humidity 50-70% Moisture 3 pH 5.5-5.8 EC growing medium 1:1,5 1.0 - 1,25 Ms /cm volume extraction in water EC feeding in mS/cm 1.5 - 2.0 Ms/cm Fertilizer N: K 1 : 3
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Classification: PUBLIC
Preventive chemical control options against Downy Mildew
Chemical Prevention schedule Finished plant production: •Preventive fungicide applications: Care should be taken when spraying CP chemicals (wind dispersal). Week Fungicide Potsizes Application treatment Rotational program: (Post Transplant) UK specification use 1 2 Spray Revus (Mandipropamid) 3 6/9 pack,Small pots 4 ≤ 10,5cm Spray
Percos (ametoctradin and dimethomorph).
8 9 9 10
Spray
Revus (Mandipropamid)
11
Spray
Fenomenal (Fenamidone)
5 6 7 Medium sized pots
Larger pots ≥ 17cm
*Alternative option: Fubol Gold (Mancozeb & Metalaxyl-M but check predominant isolates were metalaxyl-sensitive!.) *It is possible to apply Fenomenal again with the larger pots just before delivery.
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Classification: PUBLIC
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Classification: PUBLIC