The kill time for Suspend Polyzone varies. It is a residual product so it will not kill if sprayed directly. Suspend will kill wasps and other insects over a period of several hours after they contact treated areas. It will leave a residual that will last up to 90 days, both indoors and outdoors.
Suspend Polyzone is labeled for controlling aphids and other pests on plants and in flower gardens, but it does not specifically list mealybugs on the label so we cannot say for certain it will control them. However the Suspend SC which is just the non-polymer version of Suspend Polyzone does list both aphids, mealybugs and hundreds of other similar pests on the label.
The biggest difference between Demand CS and Suspend Polyzone is the residual they have outdoors. Suspend Polyzone was designed with special time release polymer coating to hold up in heat, cold, and irrigation for up to 90 days. Demand CS will last approx 30 days.
Suspend Polyzone is formulated to last longer than other pesticides in heat, sunlight, and other extreme weather. There is not a specific temperature requirement or limit for applying it outdoors, as long as temperatures are over freezing. We recommend spraying in the morning or evening when temperatures are cooler for your own comfort and since pollinators are less active during those times. You can retreat at 30, 60, or 90 days intervals depending on pest pressure and rainfall.
Unfortunately, most insecticides are not effective on these bees since they only cut the leaves and do not chew on them.
This article has a few non-chemical suggestions to help reduce damage to desirable plants:https://extension.colostate.edu/topic-areas/insects/leafcutter-bees-5-576/