Which of the following weeds is NOT mentioned as having herbicide resistance?

The option that is indicated as correct, which is sunflower, is not mentioned as having herbicide resistance in the context of the other weeds listed. Pigweed, wild carrots, and fleabane are widely recognized for developing resistance to various herbicides, which poses significant challenges for their management in agricultural settings.

Sunflower, on the other hand, does not typically present the same issues related to herbicide resistance. This distinction is crucial for farmers and pest management professionals as they develop strategies for controlling these plants. Understanding which weeds have developed resistance can influence herbicide selection and overall management approaches.

Having a clear idea of which species are prone to herbicide resistance helps in making informed decisions to mitigate the impact on crop production and manage resistance development effectively.