Late glyphosate at 0.84 kg ae/ha gave the most consistent weed control.

glyphosate · weed · Zea mays (maize)Positive and negative results

32 papers in the same direction as this claim · 5 in the opposite direction · 3 reporting no difference from an alternative

1. positive
   Sequential glyphosate applications reduced weed biomass in corn each year compared with a single glyphosate application at the 5-cm weed height.

   Effect of Glyphosate Application Timing and Row Spacing on Weed Growth in Corn (Zea mays) and Soybean (Glycine max)¹ · 2004 · compared with a single glyphosate application at the 5-cm weed height

   Same directionCites this paper

2. positive
   A single glyphosate application delayed until weeds were 15 cm or taller gave the most effective and consistent season-long annual grass and broadleaf weed control in corn.

   Effect of Postemergence Glyphosate Application Timing on Weed Control and Grain Yield in Glyphosate-Resistant Corn: Results of a 2-Yr Multistate Study¹ · 2003

   Same directionCites this paper

3. negative
   Weed densities were greater under the minimum treatment than under the IWM or conventional treatments in all crops.

   Evaluation of alternative weed management systems in a modified no-tillage corn–soybean–winter wheat rotation: weed densities, crop yield, and economics · 2002 · compared with IWM or conventional treatment

   Opposite direction

4. negative
   Glyphosate alone reduced weed control in crimson clover.

   Control of Legume Cover Crops in No-Till Corn (Zea mays) and Cotton (Gossypium hirsutum) · 1990

   Opposite direction

5. no effect
   Adding Crop Booster to glyphosate did not affect weed control or corn yield in the main comparison.

   Effect of Biostimulants Added to Postemergence Herbicides in Corn, Oats and Winter Wheat · 2015

   Opposite direction

6. negative
   The mixtures increased the number of dominant weeds.

   The Growth and Yield of Sweet Corn under Minimum Tillage Technology by Using Various Doses of Herbicide Mixtures of Glyphosate and 2,4-D · 2019

   Opposite direction

7. no effect
   Increased glyphosate rates did not significantly improve weed control in corn.

   Effect of Crimson® NG Adjuvant on Glyphosate Efficacy in Corn · 2024

   Opposite direction

8. no effect
   Adding 2,4-D to glyphosate did not improve weed control in corn.

   Combinations of Nonselective Herbicides for Difficult to Control Weeds in No-Till Corn,Zea mays, and Soybeans,Glycine max · 1988 · compared with glyphosate

   No difference from an alternative

32 papers more in this group