How much SELECTO 75 WSP should you add to 100 gallons of water to treat for spittlebug insects on roses?

The appropriate amount of SELECTO 75 WSP to use for treating spittlebug insects on roses in 100 gallons of water is indeed 0.5 ounces. This dosage is derived from the product label, which specifies the correct rate of application based on the pest being managed and the volume of water used for dilution.

In this case, SELECTO 75 WSP is designed to be effective at a low concentration, and the recommended application rate for spittlebugs is typically quite low in terms of the product's weight. When mixing pesticides, it's essential to follow the manufacturer's guidelines to ensure both efficacy in pest control and safety for the plants, the applicator, and the environment. Choosing the correct amount based on label directions is crucial to avoid over-application, which could lead to plant damage or environmental harm.

The other possible answers, while they may represent common quantities used for different products or situations, do not align with the specific label recommendation for SELECTO 75 WSP regarding spittlebug treatment on roses. Therefore, the safest and most effective option is to adhere strictly to the label's guidance.