Which of the following would NOT be a concern when planning an aquatic herbicide program?

Introducing bioengineered fish populations would not be a direct concern when planning an aquatic herbicide program because the focus of such a program typically revolves around the specific management of aquatic vegetation rather than the introduction of new fish species. The primary objectives of an aquatic herbicide program are to effectively control unwanted plant growth, ensure safe application techniques, and minimize environmental impact rather than addressing the genetics or introducing different fish populations.

In contrast, weather conditions play a critical role as they can significantly affect herbicide effectiveness, the safety of application, and the potential for runoff. The cost of treatment is also a vital consideration, as it impacts budgeting and the feasibility of implementing a management plan. Lastly, the method of application is key to ensuring the herbicide reaches the target species effectively while minimizing harm to non-target species and the environment. These factors are directly linked to the success and efficiency of the herbicide program, making them essential to consider in the planning phase.