The potential for phytotoxicity and injury to the crop for a new pest control or fertility product is of such importance that registration requirements include many tests specifically aimed at establishing this product characteristic. Usage rates are increased at several times field levels and common tank mix partners are used to simulate potential situations where plant injury may occur. In addition, various growing regions where plant cutical development differs, or extreme environmental conditions where plant stress may predispose tissues to phytotoxicity are emphasized in tests of product safety. Pacific Ag has conducted many of these studies over the years and can recognize even subtile effects of products on plant development and physiology. Our staff are recognized as world experts in recognizing and quantifying both morphological and physiological injury of pesticides to plants.