Under what condition may the DNR limit a permit for aquatic pesticide application?

The Department of Natural Resources (DNR) may limit a permit for aquatic pesticide application if the proposed application is deemed ineffective or unreasonable. This condition is based on the understanding that the primary objectives of pesticide applications are to effectively control pest populations while minimizing environmental impacts. If a method or product does not achieve the desired level of control or poses an unreasonable risk to the aquatic ecosystem or surrounding areas, the DNR has the authority to restrict the application to protect natural resources and public health. This ensures that pesticide applications are conducted responsibly and in alignment with best management practices.

The other conditions mentioned do not directly relate to the effectiveness or reasonableness of the application process in the same regulatory context. Cost considerations, the presence of endangered species, or the degree of disturbance are relevant factors but do not typically serve as primary criteria for limiting the use of a permit under DNR regulations on aquatic pesticide applications.