The product that most backpack misting companies use is Onslaught Fastcap. The second most popular is Demand CS. The reason is that these products are microencapsulated and will last longer in the sunlight and environment. Sector is a great initial kill product and is good for automatic misting systems, but needs to be reapplied every few days for best results. The other products I mentioned could give up to 21-28 days of control.