Dithane™ Rainshield™ 


Dithane™ Rainshield™ fungicide provides broad spectrum disease control and acts on six enzymatic pathways in the fungal cell to inhibit spore germination.


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Forty years and counting, Dithane Rainshield fungicide, the world’s most trusted fungicide.


Protect crop yields by managing damaging diseases in a variety of crops.


Rapid control of numerous diseases at an economical price.

Resistance management

Unique multi-site activity explains why no fungal resistance has developed in over 40 years of use.

Rotation option

Contact control provides a rotation option from systemic fungicides in wheat, lentils and potatoes.


Registered for use in Canada.

  • Registered
  • Unregistered


Below lists the crops that Dithane Rainshield fungicide can be used on.


Alfalfa, For Seed (Medicago sativa ssp. sativa)



Ash (Fraxinus spp.)


Cantaloupe (Cucumis melo var. cantalupensis)


Carrot (Daucus carota ssp. sativus)

Celeriac Celery Root

Celeriac Celery Root


Cucumber (Cucumis sativus var. sativus)


Fir, Douglas, Release (Pseudotsuga menziesii)

Fir, Douglas (Pseudotsuga menziesii)


Ginseng (Panax quinquefolius)


Grape (Vitis spp.)


Honeysuckle (Lonicera spp.)


Oak (Quercus spp.)


Onion (Allium spp.)


Potato (Solanum tuberosum ssp. Tuberosum)



Squash (Cucurbita spp.)


Tobacco (Nicotiana tobacum)


Tomato (Lycopsersicon esculentum)


Vegetables, Cucurbit (Cucurbitaceae)


Watermelon (Citrullus lanatus)


Wheat (Triticum spp.)

Technical Specifications

  • Application Method
  • Approved Use
    Refer to the Dithane Rainshield label for complete use instructions.
    Refer to the Controlled Disease list for the full list of diseases.
  • Rates
    • Alfalfa: 0.59 kg/ac
    • Lentils: 0.9 kg/ac
    • Potatoes: 0.45-0.9 kg/ac (start with low rate, increase to maximum rate as foliage develops)
    • Wheat: 0.45 kg/ac (early spray), 0.9 kg/ac (late spray)
    • Water volume: 18 L/ac (aircraft), 45-80 L/ac (ground), and 324 L/ac (sugar beets)
    • Pressure: 345 kPa
    • Nozzles: Hollow cones or flat fan recommended
  • Application Timing
    For Alfalfa (seed production only), Lentils, Potatoes, Wheat

    • Lentils: First application before flower when bud formation is evident. Second application 10 to 12 days after first application, but before rows close in to and form a dense canopy. If conditions for disease persist, a third application may be applied 10 to 14 days later.
    • Potatoes: When plants are 10 to 15 cm tall; repeat at 7 to 10 day intervals.
    • Wheat: 2-leaf to 3-leaf (early application), 2 tillers to fully headed (late application).

    Rainfast: 2 Hours
  • Crop Rotation
    No restrictions.
  • Mixing Instructions
    For Alfalfa (seed production only), Lentils, Potatoes, Wheat

    1) Pour Dithane Rainshield slowly into filled spray tank while the agitator is running.
    2) Completely fill tank with water.
    3) After Dithane Rainshield has been mixed into a suspension, add other co-applied pesticides, growth regulators, micronutrients or spray adjuvants.
    1) Premix Dithane Rainshield thoroughly in a nurse tank.
    2) Fill spray hopper to the desired final water volume.
    3) Add slurry from Step 1 to spray hopper.
    4) Top off hopper to desired final water volume.
  • Herbicide Group

    Group M3

  • Grazing

    Do not graze treated crops or cut for hay.

  • Tank Mixes
    • Nova Fungicide


Labels (PDF)
Dithane Rainshield Fungicide Label
Fongicide Dithane Rainshield étiquette principale

Safety Data Sheet (PDF)
Dithane Rainshield Fungicide SDS
Fongicide Dithane Rainshield fiche signalétique

Additional Resource Material (PDF)
Horticulture Crop Protection Guide
Guide de Protection des Cultures

Before use and for complete product information, please read and follow label directions.

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