High temperatures have what effect on herbicide absorption and activity?

High temperatures actually enhance herbicide absorption and activity, rather than decrease it. When temperatures increase, the cell membranes of plants become more permeable, which allows for improved uptake of herbicides. Additionally, many herbicides become more active at higher temperatures, which can lead to more effective control of target aquatic pests.

Therefore, increased temperature can result in both higher absorption rates of the herbicide into the plant tissues and enhanced biochemical activity once the herbicide is absorbed, leading to better performance overall. Understanding the effects of temperature on herbicide dynamics is important for optimizing their use in controlling aquatic vegetation.