• Benefits at a Glance
• Soil Benefits At A Glance
• Foliar Benefits At A Glance
• Cost Savings You Can See
• Minimize Yield Drag
• Effects of Glyphosate
• If You Use Glyphosate, You Need FoliarBlend
• Pathogenic Stress
• Foliar Feeding
• Facing The Challenge
• Performance In The Field
• Reduce Fusarium
• Environmental Effect
• FoliarBlend vs. Other Bio-Stimulants

Minimize Roundup Ready Yield Drag with FoliarBlend

Glyphosate, the active ingredient in Roundup, can suppress the formation of nitrogen nodules on soybean roots. Glyphosate may temporarily weaken the RR soybean plant immune response and defense mechanisms, especially when conditions place the plant under stress from environmental conditions or attack from pests or disease.

 

Glyphosate-induced chlorosis/

necrosis on younger leaves

 

 

From left to right, these soybean plants show the effects of an increased rate of Glyphosate.
Photo from Dr. Ismail Cakmak

 

Roundup (glyphosate) and Roundup Ready (RR) technology has become a mainstay in American soybean production. However, hundreds of university and independent studies have shown there is a yield drag of 5–10% with RR varieties compared to comparable conventional varieties grown under similar and favorable conditions. In some trials, RR soybeans produced higher yields which were attributed to improved weed control. In other trials, RR soybeans performed poorly with the yield drag having severe economic consequences. Continued research is being done to understand the yield drag in RR soybeans however recent evidence points to two possible explanations for this response. First, glyphosate, the active ingredient in Roundup, can suppress the formation of nitrogen nodules on soybean roots. This reduction in the development of nodules decreases the amount of nitrogen available to the soybean plant and can reduce yields. This effect from applied glyphosate is greater when the crop is under stress from conditions such as drought. The effect of glyphosate is likely on the suppression of rhizobium, the symbiotic bacteria required for nodulation, but it may also be from a broader effect on the normal physiology of the soybean plant.

Second, glyphosate application may temporarily weaken the RR soybean plant immune response and defense mechanisms, especially when conditions place the plant under stress from environmental conditions or attack from pests or disease. With the plant’s ability to defend itself at a weakened level, the plant is more susceptible to yield loss.

 

 

Roundup Ready™ is a trademark of Monsanto Company.