Oregon Agriculture Herbicide Practice Exam

Herbicide resistance refers to the phenomenon where weed populations survive applications of herbicides that were previously effective in controlling them. Over time, certain weeds may develop genetic changes or adaptations that enable them to withstand the effects of these chemicals. This survival can occur due to various factors such as natural selection, where the application of the herbicide kills susceptible individuals, leaving behind those with resistance traits to reproduce and spread their genes to future generations.

This becoming more prevalent can complicate weed management strategies, as the initial herbicide that was controlling the weeds effectively becomes less useful, necessitating the development of new approaches to manage these resistant populations. Understanding herbicide resistance is crucial for farmers and those involved in agriculture to make informed decisions about pest management and to adopt integrated weed management practices that can help mitigate the development of resistance.