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Registered Crop Input Products / VIKING™ Risor Herbicide

VIKING™ Risor Herbicide

PCP #34792 · Viking Crop Production Partners Inc. · Herbicide

Group 2

Group 2 soluble granule herbicide containing thifensulfuron-methyl and tribenuron-methyl for post-emergent control of annual broadleaf weeds and suppression of Canada thistle in wheat (spring, winter and durum) and spring barley. Multiple tank mix options available for expanded weed spectrum including Group 2 resistant kochia and annual grasses.

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Registered uses (23)

Crop × pest × application rate combinations from the official label. Rates converted to per-acre. Always confirm against the official label PDF before applying.

CropTargetRatePHI
BarleyBroadleaf weeds controlled by VIKING Risor and weeds controlled by 2,4-D Ester12.1 g/acre–
BarleyBroadleaf weeds controlled by VIKING Risor plus 2,4-D Ester, plus Group 2 resistant KOCHIA12.1 g/acre–
BarleyBroadleaf weeds controlled by VIKING Risor plus Group 2 resistant KOCHIA12.1 g/acre–
BarleyBroadleaf weeds controlled by VIKING Risor, Dandelion, Cleavers (1-6 whorl), Kochia including Group 2 resistant biotypes, Volunteer group 2 tolerant canola varieties12.1 g/acre–
BarleyBroadleaf weeds controlled by VIKING Risor, cleavers (1-6 whorl), kochia including Group 2 resistant biotypes12.1 g/acre–
BarleyBroadleaf weeds controlled by VIKING Risor, kochia including Group 2 resistant biotypes, cleavers (1-4 whorl)12.1 g/acre–
BarleyBroadleaf weeds controlled by VIKING Risor, plus wild oats, volunteer oats, green foxtail, yellow foxtail, volunteer canary seed and proso millet12.1 g/acre60 d
BarleyBroadleaf weeds controlled by VIKING Risor, white cockle, dandelion, volunteer group 2 tolerant canola varieties12.1 g/acre–
CerealsAnnual smartweed, Cow cockle, Hemp-nettle, Kochia, Lamb's-quarters, Redroot Pigweed, Stinkweed, Volunteer Rapeseed, Wild Buckwheat, Wild mustard; Suppressed: Canada thistle12.1 g/acre–
WheatAnnual smartweed, Cow cockle, Hemp-nettle, Kochia, Lamb's-quarters, Redroot Pigweed, Stinkweed, Volunteer Rapeseed, Wild Buckwheat, Wild mustard; Suppressed: Canada thistle12.1 g/acre–
WheatAnnual smartweed, Cow cockle, Hemp-nettle, Kochia, Lamb's-quarters, Redroot Pigweed, Stinkweed, Volunteer Rapeseed, Wild Buckwheat, Wild mustard; Suppressed: Canada thistle12.1 g/acre–
WheatAnnual smartweed, Cow cockle, Hemp-nettle, Kochia, Lamb's-quarters, Redroot Pigweed, Stinkweed, Volunteer Rapeseed, Wild Buckwheat, Wild mustard; Suppressed: Canada thistle12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor + 2,4-D, plus wild oats and green foxtail12.1 g/acre80 d
WheatBroadleaf weeds controlled by VIKING Risor and weeds controlled by 2,4-D Ester12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor and weeds controlled by 2,4-D Ester12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor plus 2,4-D Ester, plus Group 2 resistant KOCHIA12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor plus Group 2 resistant KOCHIA12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor, Dandelion, Cleavers (1-6 whorl), Kochia including Group 2 resistant biotypes, Volunteer group 2 tolerant canola varieties12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor, cleavers (1-6 whorl), kochia including Group 2 resistant biotypes12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor, cleavers (1-6 whorl), kochia including Group 2 resistant biotypes12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor, plus wild oats, volunteer oats, green foxtail, yellow foxtail, volunteer canary seed and proso millet12.1 g/acre60 d
WheatBroadleaf weeds controlled by VIKING Risor, white cockle, dandelion, volunteer group 2 tolerant canola varieties12.1 g/acre–
WheatBroadleaf weeds controlled by VIKING Risor, white cockle, dandelion, volunteer group 2 tolerant canola varieties12.1 g/acre–

About this content. This page presents the official PRD label as published by Health Canada's Pesticides Regulatory Directorate (formerly the Pest Management Regulatory Agency), the source of record. Always read the official label and consult your provincial pesticide- application authority before use. Report an error.

Quick facts

Active ingredients
thifensulfuron-methyl 25 %
Sulfonylurea herbicide
Mode of action: ALS / AHAS inhibitor (HRAC 2, Sulfonylurea)
CAS 79277-27-3
tribenuron-methyl 25 %
Sulfonylurea herbicide
Mode of action: ALS / AHAS inhibitor (HRAC 2, Sulfonylurea)
CAS 101200-48-0
Formulation
liquid
Resistance group
Group 2
First registered
2023-03-29
Registration expiry
2029-12-31