Crop & Pest Report


| Share

Temperature, Herbicide and Crop Response (6/7/12)

Many people are asking how long should herbicide applications be delayed after frost damage to crops. Cold weather is a stress to plants.

Desiccation from frost is a stress. Any stress can inhibit a plant’s ability to degrade and metabolize pesticides. Preferably, herbicide applications should be delayed until new plant growth appears and a sign that plants have resumed normal growth. Unfortunately, weeds will continue to grow and may be larger than desired. So it is a judgment call as to how soon the herbicide can be applied, but wait at least a couple of days. Warmer daytime temperatures can also speed recovery of crop plants.

Rich Zollinger

Extension Weed Specialist

Creative Commons License
Feel free to use and share this content, but please do so under the conditions of our Creative Commons license and our Rules for Use. Thanks.