What is the term used to refer to the effect of weeds becoming more tolerant of a herbicide?

The term that specifically refers to the phenomenon where weeds become more tolerant or resistant to a herbicide is known as herbicide resistance. This occurs when certain weed species survive herbicide applications that previously would have controlled them. Over time, due to repeated use of the same herbicide, these weed populations can undergo natural selection, allowing individuals that have or develop genetic traits conferring resistance to survive and reproduce. As a result, the overall effectiveness of that herbicide diminishes, prompting the need for alternative management strategies or different herbicides. Understanding this process is pivotal in agronomy and pest control practices to manage weed populations effectively and sustainably.