Yes, you could possibly use a pull-behind sprayer to apply the products in the Mosquito Control Kit – Professional. Keep in mind that for mosquitoes, the key is to apply to the underside of leaves on trees/bushes which is there the adults lay during the day, as well as shady areas. You would not treat entire areas of the lawn that are in full sun as it is not habitable for them there. For general insects you can treat the lawn though.
We have a guide here that explains as well.
The liquid concentrates in the Mosquito Control Kit - Professional can be applied with a hand pump, backpack sprayer, hose-end sprayer, or a mist blower
You should avoid getting the products (or drift) in the Mosquito Control Kit - Professional into swimming pools though small amounts that accidentally get in a pool will be so diluted that there shouldn't be any concern. It is highly recommended to cover the pool during the pest control applications (once per month).
Unfortunately, there are no good answers for black fly because they are not attracted to fly traps or fly baits and there is no way to stop the larva from developing. You may want to check in with your local department of agriculture to see if they have any advice for you.
The insecticides (Bifen IT, Tekko Pro & ExciteR) in the Mosquito Control Kit - Professional may only provide partial control for black flies if applications are made where you see the flies land. The residual insecticide in the Mosquito Control Kit, Bifen IT however is labeled for biting flies, house flies, gnats, mosquitos, and many other insects. It is a great general purpose outdoor insecticide to use mixed at 1 fl oz per gallon of water per 1,000 sq ft. Please view the product label here for more information.
According to the most restrictive product label in the Mosquito Control Kit – Professional:
Follow manufacturer’s instructions for cleaning/ maintaining PPE. If no such instructions for washables exist, use detergent and hot water. Keep and wash PPE separately from other laundry.
You should always remove PPE before entering living spaces or sitting on furniture, or use shoe covers if you must enter the home or other sensitive areas.
Yes, the concentrated products in the Mosquito Control Kit - Professional will help treat for a variety of flies including biting flies.