In 1993, Muck Research Station staff conducted and/or cooperated on research projects with researchers of the Departments of Environmental Biology and Horticultural Science at the University of Guelph; researchers from Agriculture Canada research stations at London and Vineland Station; the Ontario Pesticide Residue Testing Laboratory; researchers of the Horticultural Products Laboratory (H.R.I.O.). at Vineland Station, research departments of the Crop Protection Chemical Industry and Growers. This report highlights the research projects which were conducted in 1993. The results published in this report should be treated as a progress report. Some of the chemicals used in the trials are not registered for use on the crops they were applied to. Additional trials may be necessary before any firm conclusions and recommendations can be given.