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Pre-harvest Glyphosate Staging Guide for Canola

By applying pre-harvest glyphosate at 50-60% seed colour change in the least mature areas of the field, including any areas of regrowth with seed production, growers can be confident grain moisture will be <30%. At this stage, seeds in the main stem will be:

  • Top = green, firm to roll
  • Middle = mostly brown, with some speckling
  • Bottom = completely brown/black
  • Where allowed, glyphosate is registered for pre-harvest weed control and is not to be used as a desiccant
  • Pre-harvest glyphosate may only be applied when grain moisture content is less than 30% in the least mature part of the field, including any areas of regrowth which may produce seed. Applying too early can result in unacceptable product residues in the grain.
  • To avoid unacceptable residue levels, always follow the product’s label for application rate, timing and pre-harvest interval (PHI).
  • Never harvest earlier than recommended – this can increase the risk of unacceptable glyphosate residues in harvested grain.
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Dicamba Returns for Georgia Farmers: What the New EPA Ruling Means for Cotton Growers

Video: Dicamba Returns for Georgia Farmers: What the New EPA Ruling Means for Cotton Growers

After being unavailable in 2024 due to registration issues, dicamba products are returning for Georgia farmers this growing season — but under strict new conditions.

In this report from Tifton, Extension Weed Specialist Stanley Culpepper explains the updated EPA ruling, including new application limits, mandatory training requirements, and the need for a restricted use pesticide license. Among the key changes: a cap of two ½-pound applications per year and the required use of an approved volatility reduction agent with every application.

For Georgia cotton producers, the ruling is significant. According to Taylor Sills with the Georgia Cotton Commission, the vast majority of cotton planted in the state carries the dicamba-tolerant trait — meaning farmers had been paying for technology they couldn’t use.

While environmental groups have expressed concerns over spray drift, Georgia growers have reduced off-target pesticide movement by more than 91% over the past decade. Still, this two-year registration period will come with increased scrutiny, making stewardship and compliance more important than ever.