As a grain farmer, there is nothing more alarming than seeing your wheat crop turn yellow shortly after applying herbicides. In some cases, the yellowing can be attributed to environmental factors, but in others, it can be linked to herbicides. Here’s what you need to know about yellowing in wheat after herbicide application.
Herbicides are intended to help control weeds that compete with crops for nutrients, water, and sunlight, and can reduce yields. However, if you use the wrong herbicide for your crops, or apply it at the wrong time or incorrect rate, it can be harmful to your crop despite the benefits it can offer.
One of the telltale signs of herbicide damage in wheat is yellowing. It can occur within days of herbicide application and can become more severe as time passes. The most common herbicides that can cause wheat yellowing include glyphosate, 2,4-D, and dicamba.
Glyphosate is commonly used for weed control in wheat fields, and yellowing associated with the application of this herbicide can be caused by several factors, including:
– Applying the herbicide at incorrect rates
– Using incompatible tank mixes
– Applying the herbicide at the wrong time
– Poor weather conditions during and post-application
2,4-D and dicamba can also cause yellowing in wheat. These herbicides can drift and cause damage to nearby crops, leading to yellowing of the foliage and stunted or deformed growth.
Yellowing is a sign of stress from herbicide damage to the wheat plant. In most cases, the damage is temporary, and the wheat plant will recover after a few days or weeks. However, if the yellowing persists, it can lead to poor grain quality and reduced yield.
To avoid herbicide damage and yellowing in your wheat crops, follow these guidelines:
– Use herbicides that are suitable for wheat crops
– Apply herbicides at the correct rate and appropriate timing
– Avoid spraying during extreme weather conditions such as high temperatures, wind speeds, or drought
– Use drift-reducing technologies to minimize herbicide drift.
– Scout regularly for signs of herbicide damage and other diseases or pests in your wheat crops.
In conclusion, yellowing of wheat after herbicide application is a sign of stress that should be taken seriously. Ensure you use the right herbicide for your wheat crops at the right time and correct rate, beware of adverse weather conditions during and post-application, and scout regularly to monitor your crop’s health. By following these guidelines, you can prevent herbicide damage, increase crop health, and yield.