The CoAXium® WPS is an herbicide-tolerant production system — meaning it is possible that biotic and abiotic stress factors can result in crop response from herbicide applications. With any herbicide-tolerant cropping system, crop response can occur, and our goal with the CoAXium WPS is to help educate users to minimize that potential risk — including deciding when is the optimal time to apply Aggressor® herbicide.

Consider these crop stress conditions prior to applying Aggressor:

  • Slowed plant metabolism due to temperatures below 32°F
  • Low soil pH environments (below 4.8 pH with low organic matter)
  • Sandy soil types with lower levels of organic matter
  • Varieties not adapted to the micro-climate
  • Significant stress from drought conditions
  • Significant stress from excessive moisture
  • Disease pressure specific to root and crown rot
  • Heavy weed pressure resulting in crop competition for space and nutrients
  • Herbicide carryover — i.e. Beyond (Imazamox)
  • Deficient fertility management resulting from weed pressure and timing

Always follow the Aggressor label, including these critical success factors:

Watch the weather. Do not apply Aggressor when temperatures are expected to be below 32°F — 5 days before and 5 days following application date — ideally making applications when nighttime lows are above 40°F.
Watch your wheat. Only apply Aggressor when wheat and grassy weeds are actively growing. Accumulating positive growing degree days (heat units) reduces the chance of crop response. And:
  • Apply Aggressor herbicide to CoAXium wheat between the 4 leaf and prior to jointing stage (jointing stage of growth defined as 1st node extending up from the soil line).
  • Spray when weeds are smaller, prior to inter-plant competition scenarios where weeds steal water and nutrients.
  • Reduce fertilizer tank mixes when concerned about crop response.
  • When crop stress factors are present, utilize NIS versus MSO when possible (weed control will be reduced on feral rye and jointed goatgrass).
  • Apply Aggressor separately from broadleaf herbicide applications when concerned about crop response.
Be mindful of your specific growing conditions:
  • Determine if your micro-climate has low pH and/or low levels of organic matter. If crop response is not acceptable — do not apply Aggressor.
  • Select a CoAXium variety that has been proven to perform in your micro-climate and production management system.

Questions? Please ask.

If you have questions about application rate/acre by weed species and size, required surfactant use by weed species, sprayer application volume, application timing, tank-mix partners or anything else, we’re here to help. Call your local agronomist or seed dealer, or get in touch with us directly.