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Herbicide Recommendations for Flax: Postemergence Broadleaf Herbicides

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 20 May 2008

Pub 75: Guide to Weed Control > Other Field Crops > Herbicide Recommendations for Flax: Postemergence Broadleaf Herbicides

Excerpt from 2008 Chapter 12, Publication 75, Guide to Weed Control, Order this publication

Cover of Publication 75, Guide to Weed ControlTable of Contents

  1. Basagran + Assist
  2. Buctril M or Badge, Logic M, Mextrol
  3. MCPA Amine
  4. Flax Herbicide Ratings Tables (Table 12-1) (PDF 93 kb)
  5. Other Flax Weed Control Recommendations
  6. Related Links
Basagran + Assist
Trade Name Basagran + Assist
Active Ingredient
bentazon
+ oil concentrate
Formulation
480 g/L
 
Rate per hectare (active)
0.84 to 1.08 kg/ha
2 L/ha
Rate per hectare (product)
1.75 to 2.25 L/ha
2 L/ha
Rate per acre (product)
0.7 to 0.9 L/ac
0.8 L/ac

Precautions

  • Apply when flax is 5 cm or higher and weeds are small and actively growing.
  • Top growth of nutsedge and Canada thistle is controlled and field bindweed may be suppressed. Two applications of 1.75 L/ha (0.7 L/ac) (0.84 kg active/ha), 10 days apart may be required.
  • A new flush of weeds may emerge after the first flush has been controlled.
  • Cool weather or drought may reduce control.
  • Reduce oil concentrate to 1 L/ha (0.4 L/ac) under abnormally hot and humid weather conditions or temporary crop injury may occur.

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Buctril M or Badge, Logic M, Mextrol
Trade Name Buctril M

or Badge, Logic M, Mextrol

Active Ingredient
bromoxynil/MCPA
or bromoxynil/MCPA
Formulation
560 g/L (1:1)
450 g/L (1:1)
Rate per hectare (active)
0.56 kg/ha
0.56 kg/ha
Rate per hectare (product)
1 L/ha
1.25 L/ha
Rate per acre (product)
0.4 L/ac
0.5 L/ac

Precautions

  • Apply when the flax is 5-10 cm high before weeds have developed beyond the 4-leaf stage.
  • Do NOT use if the daytime temperature is over 29°C.

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MCPA Amine 500
Trade Name
Active Ingredient MCPA
Formulation 500 g/L
Rate per hectare (active) 0.5 kg/ha
Rate per hectare (product) 1 L/ha
Rate per acre (product) 0.4 L/ac

Precautions

  • Flax may be treated when 5 cm tall to bud stage.
  • Best weed control is obtained if the application is made when the weeds are small (approx. 5 cm tall).

Related Links

 

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