Crop manual: Impatiens walleriana Imara®

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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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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Legal © 2018 Syngenta. All rights reserved. The publication and its content is proprietary to Syngenta. It may not be photocopied or reproduced in any form. Product names marked ® or ™, Syngenta Flowers, the SYNGENTA Wordmark and the SYNGENTA Logo are trademarks of a Syngenta Group Company. Syngenta has exercised reasonable care and skill in compiling this publication. All data in this brochure is intended for general guidance only and the user should apply it only for the purposes for which it has been created and in accordance with his own knowledge and experience of local conditions. Syngenta cannot accept any liability in connection with this advice.

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Classification: PUBLIC