Kumulus WG - Sulphur Fungicide



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A water dispersible granular fungicide and acaricide for an effective treatment and control of powdery mildew, various other fungal diseases as well as certain mites and thrips on various crops as listed. Also for the control of pernicious scale on dormant roses.

KUMULUS WG controls mites, thrips, powdery mildew, rust, Scab on fruits, ornamentals and vegetables. Also for pernicious scale on dormant roses.

Our opinion: KUMULUS WG is one of the only product we have found to be very effective against Powdery Mildew (PM). 


How does it work? 

KUMULUS WG is the only sulphur product with three distinct particle sizes, each with a specific function:

  • Small: Rapid activity (50% of particles are less than 3 microns)

  • Medium: Sustained release (40% are 3 – 6 microns)

  • Large: Residual control (10% are 6 – 10 microns)

Once applied to the plant surface, the smallest particles begin working immediately through contact and vapour activity. The medium sized particles erode slowly and provide sustained release of active ingredient, and the larger particles provide longer-term control. 

Kumulus WG Sulphur spray features and benefits:

  • Delivers rapid and extended control of fungal diseases and mites.
  • Can be used till just before harvest.
  • Minor plant disturbance and a small benefit of Sulphur is absorption through the leaves.
  • Stays in suspension to help minimize risk of scorching.
  • Three distinct particle sizes deliver immediate activity, sustained release and extended residual control.
  • Contains a spreader - sticker for improved adherence and rain fastness.
  • Rapidly disperses in water and stays in suspension, ensuring that all the KUMULUS put in the spray tank reaches the plants.
  • Exhibits acaricidal activity for control of red spider mite.
  • Sprayed throughout growing season excluding pernicious scale. (Quadraspidiotus perniciosus) on roses.



    • Size: 200g
    • Ingredients: Sulphur 800 g/kg
    • Group Code M2 fungicide
    • Registered Fungicide No. L2404 N-AR0732 Act No. 36 of 1947


    • Do not inhale spray mist or dust
    • Store in a cool, dry place away from food and feedstuffs.
    • Keep out of reach of children, uninformed persons and animals.
    • Flammable – do not store near open flames or sparks.

    Directions for use


    • Mix Kumulus with water in a compression sprayer - Dosages Below
    • Apply in the early evening on flowering plants
    • Can be used in the whole flowering stage –  it is however recommended minimize/avoid preventative applications on late flowering Cannabis plants (last 4-6 weeks before harvest).
    • Highly effective against Powdery Mildew


    • Avoid application if rain is immediately imminent – spray must have time to dry on the plant. If heavy rain follows soon after treatment use a shorter spray interval.
    • Apply as soon as decease is present.
    • Minimize/avoid preventative applications on late flowering Cannabis plants (last 4-6 weeks before harvest).
    AVOCADO Thrips (Thripidae spp) 15 g Apply when first symptoms are noticed
    PAPAYA Powdery mildew (Ovulariopsis papayae) 15 g Apply when first symptoms are noticed. Repeat weekly.
    Flat mite (Brevipalpus californicus)


    Grey mite (Calcarus citrifolii)

    Silver mite (Hemitarsonemus latrus)

    Rust mite (Phyllocoptruta oleivora)

    Thrips (Scirtothrips aurantii)

     7,5 g


    10 g

    12,5 g

    15 g

    15 g

    Full cover spray. 


    September – May

    During winter or at petal drop.

    Apply in spring if russeting occurred in previous season.

    December – May. Spray whole orchard.

    Apply at 80 – 100 % petal drop. Repeat after 10 days if necessary.




    Budmite (Eriophyes pyri)


    Powdery mildew (Podosphaera leucotrich)

    Scab (Venturia inaequalis)

    20 g


    10 – 20 g

    High volume full cover spray at closed bud stage.


    Pre-blossom stage: 300-400 g / 100 l

    Early post-blossom stage: 250 g / 100 l

    Late post-blossom stage: 200 g / 100 

    Do not apply on sulphur sensitive cultivars





    Rust (Tranzchelia spp.) 7,5 – 15 g Winter Rainfall region: Start applications early November.


    Summer Rainfall Region: Apply from middle February, or as soon as first symptoms are noticed.

    PEACHES Powdery mildew (Oidium leucoconium) 10 – 15 g Apply at first signs of infection. Repeat every 10 – 14 days if weather favours disease. Dosage depends on severity of disease.
    GRAPE VINES Powdery mildew (Uncinula necator) 15 g Winter Rainfall Region: Start application when canes are 2,5 cm long.


    Summer Rainfall Region: Start application midsummer, particularly during drought, or when first symptoms are noticed.

    Warning: Heavy applications may cause scorching, especially on warm days.

    Do not apply within 14 days before harvest of table grapes and 4 – 6 weeks in case of wine grapes (pea size). Use in a minimum of 500 l water / ha.

    Do not apply when temperature is above 32° C.

    BEANS Thrips (Scirtothrips occipitalis)


    Red Spider Mite [(Tetranychus urticae)


    20 g  Full cover spray. Repeat at 10 – 14 day intervals.
    TOMATOES Rust mite (Aculus lycopersicae) 20 g Full cover spray. Repeat at 2 – 4 weeks intervals.
    CUCURBITS Powdery mildew (Oidium erysiphoides) 15 g Do not use on muskmelon and cucumbers. Start application at first signs of disease and repeat every 7 – 14 days. Depending on foliage apply up to 1500 l spray mixture / ha. Ensure total coverage of all parts of the plant.
    PEAS Powdery mildew (Erysiphe pisi) 15 g Apply when first symptoms of disease appear and repeat every 7 – 10 days. Apply up to 1000 l spray mixture / ha and ensure good coverage.
    CANNABIS & ORNAMENTALS  Thrips (Thripidae spp.)


    Red Spider Mite [(Tetranychus urticae) (cinnabarinus)]

    Powdery mildew (Oidium spp.)

    20 g


    15 g

    Full cover spray. Start application at first signs of disease and repeat every 7 – 14 days.

    Apply at the end of the day (when the plant goes dormant) for flowering plants.

    Can be applied as a preventative measure when the plants switch to flowering or for preventive decontamination. 

    Sulphur may injure some ornamentals.


    Flower Carpet, Blossom Magic, Iceberg, Sharifa, Double Delight


    Pernicious scale (Quadraspidiotus perniciosus)

    120 g Full cover spray (Apply to dormant plants only, which is plants without leaves).


    Also for home garden use.

    Can be sprayed throughout the year for control of thrips, red spider mite and powdery mildew on roses.


    Any fungal population may contain individuals naturally resistant to KUMULUS and other Group Code M2 fungicides. The resistant individuals can eventually dominate the fungal population if these fungicides are used repeatedly and exclusively in programs. These resistant fungi may not be controlled by KUMULUS or any other Group Code M2 fungicides. 

    To delay fungicide resistance: 
    • Avoid exclusive repeated use of fungicides from the same Fungicide Group Code. 
    • Integrate other preventative and control methods for disease control.




    My PM keeps coming back after several applications on Kumulus?

    High humidity, low airflow and lack of light will significantly increase the spread of PM. i.e. Winter.

    Also if there is PM present in your/around your growing environment (i.e. plants/tress in your garden, undisinfected grow room) the PM will keep coming back, especially on weaker untreated plants sitting in a environment mentioned above.

    Should I bud wash my plants that are effected with PM?

    Absolutely, use a hydrogen peroxide dilution.

    What is the best product to use to decontaminate a room/equipment infected with PM?

    A strong hydrogen peroxide dilution is the most effective cleaning agent, with no left over residue.