Assembly Bill 289 aims to prohibit the Wisconsin Department of Natural Resources (DNR) from using neonicotinoid insecticides on land that it maintains, with specific exceptions. The bill creates a new statute, 29.601 (4m), which states that the DNR cannot apply any insecticides from the neonicotinoid class on its acquired and maintained lands. However, this prohibition does not extend to uses of these insecticides that are part of existing cooperative farming agreements or contracts made prior to the bill's effective date, nor does it apply to their use for forest insect control in designated areas such as forested lands, state forest nurseries, or seed orchards.

The bill reflects a growing concern over the environmental impact of neonicotinoids, particularly on pollinators and ecosystems. By limiting the use of these insecticides, the legislation seeks to promote ecological health while still allowing for necessary agricultural and forestry practices under specified conditions.