An Act amending the act of March 1, 1974 (P.L.90, No.24), known as the Pennsylvania Pesticide Control Act of 1973, providing for prohibited pesticides.

SB 1158 prohibits the use of paraquat and its salts (including methyl viologen and paraquat bismethylsulfate) as pesticides in Pennsylvania. It amends the state's pesticide law to make it unlawful to use these chemicals, defined by their chemical identifier (CAS number 4685-14-7). This directly affects farmers, agricultural businesses, and pest control professionals who currently use paraquat for crop management or other purposes. The prohibition takes effect one year after enactment, replacing any conflicting regulations.