Glisson, Wesley JContreras-Rangel, RafaelBishop, West MLarkin, Daniel J2022-05-232022-05-232022-05-23https://hdl.handle.net/11299/227648The three files include data from the Nitellopsis obtusa thalli and bulbil experiments, and associated water temperature and pH data. Please see the manuscript referenced below for a full description of the study methods and the Read Me file for a full description of the data files.Nitellopsis obtusa ([Desvaux] J. Groves [1919]; Characeae), known as starry stonewort, is an invasive macroalga in Laurentian Great Lakes states and provinces in North America. Because of its potential negative impacts on native ecosystems and recreation, N. obtusa has become a high-priority target for management. However, there is a critical lack of foundational information on the efficacy of different algaecides, and concentrations thereof, for N. obtusa control. Additionally, control of N. obtusa bulbils—asexual reproductive structures that are the main pathway for the establishment of new plants—has proven difficult. We tested the efficacy of six commonly used copper-based algaecides, at a series of copper concentrations up to the maximum labeled rate, on N. obtusa thalli (photosynthetic aboveground tissues) and bulbils in controlled laboratory experiments. Bulbils were placed above and below sediment in separate experiments to evaluate whether sediment acted as a barrier to treatment. The data from these experiments are provided and documented here.Attribution-NonCommercial-ShareAlike 3.0 United Statesbulbilcharophyteherbicideinvasive speciestreatmentviabilityDatasethttps://doi.org/10.13020/0CV1-0Z18