DUAL-ACTION FORMULA: Controls major lawn diseases and fungus, plus kills listed lawn-damaging insects on contact.RAINPROOF: Rainproof in hours – can’t be washed off by rain.PREVENTS DISEASE: Start treating when grass begins to green up in the spring; for best results, treat every two weeks.QUICKFLIP HOSE-END SPRAYER: Attaches easily to your garden hose and activates at the flip of a switch.