For enhanced residual control of target pests on field-grown woody ornamentals, landscape plants, and Christmas trees, add a horticultural spray oil to the Timectin 0.15 EC T&O spray mix at 0.5 to 1.0% of the spray volume. To maintain control, make repeat applications as necessary at 7-day intervals. Some plants may be sensitive to these oils. Test a small area of plants for phytotoxicity to Timectin 0.15 EC T&O mixed with horticultural spray oil. Evaluate the plants after 2 weeks before applying Timectin 0.15 EC T&O mixed with oils on a large number of plants. In addition, plant damage from treatment with such mixtures may be increased if the temperatures are very cold or very warm.