What is the primary effect of topramezone on susceptible plants?

Topramezone is a selective herbicide that specifically targets certain broadleaf and grassy plants by inhibiting the production of pigments, particularly the chlorophyll that gives plants their green color. When susceptible plants are exposed to topramezone, they experience a bleaching effect due to this inhibition of pigment production. The plants typically turn white or yellow, demonstrating the loss of chlorophyll, which is crucial for photosynthesis. This disruption in the production of chlorophyll ultimately leads to reduced plant health and can cause the death of the plant if exposure continues.

In summary, the primary effect of topramezone on susceptible plants is the bleaching of their tissue, which directly impacts their ability to photosynthesize and thrive.