Only when Drive XLR8 is being applied to established creeping bentgrass is the rate different than for other turfgrasses as listed on the product label. Otherwise the rate is 1.45 fl oz/1000 sqft. The product is absorbed by foliage and roots and is translocated throughout the plant. It should not harm mature trees or desirable plants when used as directed. Generally if you can it is best to use separate sprayers for herbicides and insecticides but if you use the same be sure to triple rinse the sprayer thoroughly have each application of such.