Temik is a pesticie, the active ingredient of which is aldicarb. The effectiveness of Temik depends on its systemic acitivity. It is now owned and manufactured by Bayer CropScience, but was formerly owned and produced by Union Carbide. It is used as a pesticide to protect a range of edible and inedible agricultural and horticultural crops worldwide. One of its precursors, methyl isocyanate, was involved in a mass poisoning incident at a production facility in Bhopal, India, that resulted in thousands of deaths. This event precipitated the sale of Union Carbide's agricultural chemicals division to Rhone-Poulenc. Later, Aventis Cropscience was formed from Hoechst AG and Rhone-Poulenc Agrochemical which lasted until Bayer acquired it in 2002.