Protocols for Robust Herbicide Resistance Testing in Different Weed Species

Area of Science:

• Agricultural Science
• Plant Science
• Weed Science

Background:

• Herbicide resistance in weeds poses a significant threat to global crop production.
• Accurate testing protocols are crucial for confirming herbicide resistance status in weed populations.
• Existing diagnostic methods can be laborious or provide only qualitative data.

Purpose of the Study:

• To present robust, adaptable whole-plant bioassay protocols for testing herbicide resistance in weed populations.
• To provide a reliable method for confirming resistance status and inferring resistance levels.
• To offer a cost-effective alternative for routine resistance testing.

Main Methods:

• Collection and dry storage of seeds from herbicide-surviving field plants.
• Species-specific seed germination and seedling cultivation under controlled greenhouse conditions.
• Standardized whole-plant bioassays with precise herbicide solution preparation, application volume, and spray speed.

Main Results:

• The developed protocols are adaptable to various weed species and herbicides.
• Whole-plant bioassays offer higher reliability and the ability to infer resistance levels compared to other methods.
• The protocol can be applied at a single herbicide dose for routine testing, reducing costs.

Conclusions:

• The presented whole-plant bioassay protocols provide a robust and reliable method for confirming herbicide resistance in weed populations.
• These adaptable protocols enhance the accuracy of resistance status determination and resistance level inference.
• The method offers a practical and cost-effective solution for routine weed resistance management.