SNS-217C Concentrate Spider Mite Control is the solution you've been looking for to control spider mites. Made up of 100% pure Rosemary botanical extracts (all food grade GRAS (generally recognized as safe materials.) SNS-217C Concentrate Spider Mite Control is the solution you've been looking for to control spider mites. Made up of 100% pure Rosemary botanical extracts (all food grade GRAS (generally recognized as safe) materials), SNS-217C Concentrate Spider Mite Control is a five to one (5 to 1) concentrate, one gallon of SNS-217C and five gallons of water will make a total of six gallons of ready to use spider mite contol that may be used immediately or stored and used later.