Reducing mildew in cut roses

Reducing mildew by strengthening plants

When used for long periods, Multikraft technology reduces the frequency of mildew in cut roses by up to 32 per cent and the severity of the mildew by 19.3 per cent.

A white or grey film on roses is an unmistakable sign of mildew. How can the beauty of roses be preserved in the long term? Simply use a spray solution containing MK Soil, Terrafert Leaf, fermented garlic and chilli extract, Fermented Plant Extract (FPE), EM ceramic powder and organic whey powder.

The trial

Cut roses were replanted in the Worm system (a growing system in drainage buckets with automatic irrigation). Conventional fertiliser was used. In the two subsequent years, the leaves of the roses were sprayed weekly and monitored.

Low Risk PSM	2 % Vitanal acid + 0.15 % NeemAzal-T/S, 0.2 % Kumar for infestation against powdery mildew
Strengthening 1	Multikraft spray solution
Strengthening 2	Spray treatment in weekly rotation 0.1 %, 1 % TMIX Plus Recover RX

Plant strengthener 1

Multikraft spray solution made of:

- 2% EM active (MK Soil)

- 0.5% Terrafert Leaf

- 0.2% fermented garlic and chilli extract

- 0.2% FPE (Fermented Plant Extract)

- 0.1% EM ceramic powder

- 0.1% organic whey powder

- 2% EM active (MK Soil)

- 0.5% Terrafert Leaf

- 0.2% fermented garlic and chilli extract

- 0.2% FPE (Fermented Plant Extract)

- 0.1% EM ceramic powder

- 0.1% organic whey powder

Plant strengthener 2

Spray treatment in alternating weeks

- 0.1% TMIX Plus

- 1% Recover RX

- 0.1% TMIX Plus

- 1% Recover RX

Results

A year after the roses were planted, all the variants showed positive results in terms of the severity and the frequency of powdery mildew attacks. During the last evaluation in particular, the treatment with the Multikraft spray solution had the best results.

Severity of powdery mildew on roses (evaluations 2017)

Frequency of powdery mildew on roses (evaluations 2017)

Conclusion by Frank Korting (Service Center Rural Area – Rhineland-Palatinate):

As a preventive measure and at the start of an attack, plant strengtheners can control powdery mildew. If the plant is under severe pressure or the attack has progressed, this is difficult but not impossible.

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Do you have questions about the studies?

We will be happy to answer them!

Head of Research and Development, Quality Management

Katharina Kraxberger BSc MSc

Phone:

+43 7247 50 250 149

Email:

katharina.kraxberger@multikraft.at