Which plants are generally tolerant to growth regulator herbicides?

Grasses are generally more tolerant to growth regulator herbicides due to their physiological and structural characteristics. These herbicides typically work by mimicking the natural plant hormones known as auxins, which regulate growth processes. Grasses can often metabolize or detoxify these herbicides more effectively than other plant types, such as broadleaf weeds and flowering plants, which are typically sensitive to the same chemicals.

In contrast, broadleaf weeds and flowering plants, which are more susceptible to growth regulator herbicides, can experience significant growth disturbances and lethality when these products are applied. Cacti, on the other hand, are adapted to arid environments and have unique growth patterns and physiological responses that generally do not align with the modes of action of growth regulator herbicides, making them less relevant in this context. Therefore, grasses stand out as the plant category that exhibits a higher tolerance to these herbicidal treatments.