HerbicideRoundup WeatherMAX
Roundup WeatherMAX® herbicide is the preferred brand for growers who want unsurpassed performance to control their toughest weeds in tough conditions. You can count on Roundup WeatherMAX to perform and you can have confidence in your decision knowing that Bayer stands behind every jug with the Riskshield® protection package.
fact_check
fs-approved-use: AB, BC, MB, NB, NL, NS, NT, NU, ON, PE, QC, SK, YK
title-product-highlights
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Proven crop safety on Bayer glyphosate-tolerant trait systems
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Excellent and consistent weed control under ideal and tough conditions
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30-minute rainfast guarantee*
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Enhanced efficiency with a 540 g/L formulation
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All weather warranty
info
footnotes-title
- *Rainfast guarantee, service and support and weather warranty provided through the RiskShield® Protection Package. Terms and conditions apply. Visit roundup.ca for more information.
product-details-heading
| crops | category | groups-active-ingredients | formulation-type | packaging |
|---|---|---|---|---|
• Canola • Cereals • Corn • Soybeans | • Non-Selective Herbicide | Group 9 Glyphosate | Liquid concentrate herbicide
Water soluble
540g/L formulation | • 10 L jug = 8 to 30 ac. • 115 L drum • 450 L tote • 800 L tote |
| crops |
|---|
• Canola • Cereals • Corn • Soybeans |
| category |
|---|
• Non-Selective Herbicide |
| groups-active-ingredients |
|---|
Group 9 Glyphosate |
| formulation-type |
|---|
Liquid concentrate herbicide
Water soluble
540g/L formulation |
| packaging |
|---|
• 10 L jug = 8 to 30 ac. • 115 L drum • 450 L tote • 800 L tote |
| weeds-controlled |
|---|
• Field bindweed • Annual bluegrass • Canada bluegrass • Kentucky bluegrass • Annual broadleaf weeds |
| weeds-controlled |
|---|
• Field bindweed • Annual bluegrass • Canada bluegrass • Kentucky bluegrass • Annual broadleaf weeds |
title-use-mixing
- application-guidelinesexpand_more
- 1The 0.22 L/ac. rate can be used for control of shepherd’s purse, cow cockle and night-flowering catchfly at the 1– 3 leaf stage of the crop or for control of smartweed at the 4 –6 leaf stage. Repeat applications may be required if a second flush of weeds germinates prior to canopy closure.
- 2 Biennial wormwood should be at 2 to 8 leaf stage and actively growing.
- 3 For control of volunteer adzuki beans (unifoliate to the fourth trifoliate leaf stage) apply 0.67 L/ac. A second 0.67 L/ac. application may be used for late flushes emerging after the initial treatment. Adzuki beans should be at unifoliate to fourth trifoliate leaf stage and actively growing.
| table-content-cropName | table-content-pests-herbicide | table-content-stage | table-content-rate | table-content-notes |
|---|---|---|---|---|
| Barley Bean, Dry Canola Corn Canary Seed Flax Lentils Oats Pea Soybeans Summer Fallow- Chemfallow Wheat | Please refer to label for complete list of weeds controlled and suppressed. | Refer to label | Refer to label | |
| TruFlex™ Roundup Ready canola varieties | Annual Grasses Barnyard grass, green foxtail, volunteer barley, volunteer wheat, wild oats Annual Broadleaves Chickweed, cleavers, corn spurry, cow cockle1, flixweed, hemp-nettle, kochia, lady’s-thumb, lamb’s quarters, narrow-leaved hawk’s beard, night-flowering catchfly1, non-Roundup Ready volunteer canola (rapeseed), redroot pigweed, Russian thistle, shepherd’s purse1, smartweed1, stinkweed, stork’s-bill, wild buckwheat, wild mustard, wild tomato Perennials (Suppression) Canada thistle, dandelion, perennial sow thistle and dandelion Perennials (Season-long control) Quackgrass | Emergence to first flower | 0.22 to 0.33 L/ac. single application | When 50% of the plants in the field have more than one flower. Ensure the crop has not advanced beyond the recommended growth stage for all applications. Maximum 1.33 L/ac. is allowed for the post emergence use. |
| TruFlex™ Roundup Ready canola varieties | All the above weeds plus Perennials (season-long control) Canada thistle, and perennial sow thistle | Emergence to first flower | 0.51 L/ac. single application | |
| TruFlex™ Roundup Ready canola varieties | All the above weeds plus round-leaved mallow Perennials (season-long control) foxtail barley, Canada thistle | Emergence to first flower | 0.33 L/ac. sequential applications | When 50% of the plants in the field have more than one flower. Ensure the crop has not advanced beyond the recommended growth stage for all applications. Repeat applications may be required if a second flush of weeds germinates prior to canopy closure. Maximum 1.33 L/ac. is allowed for the post emergence use. For sequential applications, ensure the crop has not advanced beyond the recommended growth stage. |
| TruFlex™ Roundup Ready canola varieties | All the above weeds plus Biennial wormwood2, cocklebur, common ragweed, crabgrass (smooth and large), eastern black nightshade, fall panicum, foxtail (yellow and giant), foxtail barley, Pennsylvania smartweed, smooth pigweed, velvet leaf, volunteer adzuki beans3, wild proso millet, wire-stem muhly Common milkweed (suppression), yellow nutsedge (suppression) | Emergence to first flower | 0.67 L/ac. single application | When 50% of the plants in the field have more than one flower. Ensure the crop has not advanced beyond the recommended growth stage for all applications. Repeat applications may be required if a second flush of weeds germinates prior to canopy closure. Maximum 1.33 L/ac. is allowed for the post emergence use. |
| TruFlex™ Roundup Ready canola varieties | All the above weeds plus Perennials (season-long control) Bur cucumber, common milkweed, dandelion, field bindweed, horse nettle, tall waterhemp, yellow nutsedge | Emergence to first flower | 0.67 L/ac. sequential applications | When 50% of the plants in the field have more than one flower. Ensure the crop has not advanced beyond the recommended growth stage for all applications. Repeat applications may be required if a second flush of weeds germinates prior to canopy closure. Maximum 1.33 L/ac. is allowed for the post emergence use. A sequential application may be made at least 2 weeks after the first application. A second 0.67 L/ac. application may be used for late weed flushes emerging after the initial treatment. Common milkweed should be 15-60 cm in height and actively growing. Yellow nutsedge should be 5-15 cm in height and actively growing. Horse nettle (2 to 12-leaf stage). Tall waterhemp up to and including the 18 leaf stage. Bur Cucumber from the 1-to-18 leaf stage. |
| TruFlex™ Roundup Ready canola varieties | All the above weeds | Emergence to 6 leaf | 1.33 L/ac. single application | One application allowed in crop per season. |
info
Footnotes
- application-tipsexpand_more
Where possible, rotate the use of Roundup WeatherMAX liquid herbicide with Transorb 2 Technology or other Group 9 herbicides within a growing season (sequence), or among growing seasons with different herbicide Groups that control the same weeds in a field
Use tank mixtures with herbicides from a different Group when such use is permitted. To delay resistance, the less resistance-prone partner should control the target weed(s) as effectively as the more resistance-prone partner.
Herbicide use should be based on an integrated weed management program that includes scouting, historical information related to herbicide use and crop rotation, tillage (or other mechanical control methods), cultural (for example, higher crop seeding rates, precision fertilizer application methods and timing that favours crops and not weeds), biological (weed-competitive crops or varieties) and other management practices.
Monitor weed populations after herbicide application for signs of resistance development (for example, determine if one weed species on the herbicide label is not being controlled). If resistance is suspected, prevent weed seed production in the affected area if possible and use an alternative herbicide from a different Group.
Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment before moving fields.
Always plant clean seed.
Have suspected resistant weed seeds tested by a qualified laboratory to confirm resistance and identify alternative herbicide options
Contact your local extension specialist, certified crop advisor, or Bayer at 1 888-283-6847 for any additional pesticide resistance-management and/or integrated weed-management recommendations for specific crops and weed biotypes
- water-volumesexpand_more
For control of perennial weeds
Apply Roundup WeatherMAX with Transorb 2 Technology in 20 to 120 L/ac. of clean water as a broadcast spray, use no more than 275 kPa of pressure
For control of annual weeds
Apply Roundup WeatherMAX in 20 to 40 L/ac. of clean water as a broadcast spray (except as otherwise stated on the label). Use no more than 275 kPa of pressure.
Unless otherwise specified, use 0.67 L of Roundup WeatherMAX per 100 L of water. For best results on harder-to-control perennials (such as bindweed, Canada thistle, hemp dogbane, milkweed), use 1.34 L per 100 L of water.
- rainfastnessexpand_more
30 minutes
- tank-mixing-procedureexpand_more
For a list of permissible tank-mix partners and mixing order, please refer to the product label.
title-additional-guidelines
- storageexpand_more
Heated storage not required
- resistance-managementexpand_more
For resistance management, Roundup WeatherMAX with Transorb 2 Technology Liquid Herbicide is a Group 9 herbicide. Any weed population may contain or develop plants naturally resistant to Roundup WeatherMAX with Transorb 2 Technology Liquid Herbicide and other Group 9 herbicides. The resistant biotypes may dominate the weed population if these herbicides are used repeatedly in the same field. Other resistance mechanisms that are not linked to site of action, but specific for individual chemicals, such as enhanced metabolism, may also exist. Appropriate resistance management strategies should be followed.
Mix Groups
Use tank mixtures with herbicides from a different Group when such use is permitted. To delay resistance, the less resistance-prone partner should control the target weed(s) as effectively as the more resistance-prone partner.
Herbicide use should be based on an integrated weed management program that includes scouting, historical information related to herbicide use and crop rotation, tillage (or other mechanical control methods), cultural (for example, higher crop seeding rates; precision fertilizer application method and timing that favors crop and not weeds), biological (weed-competitive crops or varieties) and other management practices. Weed size should also be considered, as the product is more effective on smaller weeds.
Monitor weed populations
After herbicide application check weeds in your fields for signs of resistance development (for example, one weed species on the herbicide label may not be controlled). If resistance is suspected, prevent weed seed production in the affected area if possible, by using an alternative herbicide from a different Group. Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment when moving between fields, and always plant clean seed.
Have suspected resistant weed seeds tested by a qualified laboratory to confirm resistance and identify alternative herbicide options.
Advice
Contact your local extension specialist, certified crop advisor, or Bayer at 1-888-283-6847 for any additional pesticide resistance-management and/or integrated weed-management recommendations for specific crops and weed biotypes.
For more information on weed resistance management visit https://www.mixitup.ca.
