Bifen IT and/or Talstar P and Tempo SC Ultra are very good products for mosquito control. The biggest difference between them is that they have two different active ingredients. They are both great insecticides and can be alternated so that there is no pest resistance built up.
Yes, Talstar P and NyGaurd IGR can be mixed together and applied at the same time. You want to apply at a rate of 1 oz Talstar to 3 ml of NyGuard into one gallon water.
Talstar P (Talstar One) dries within approx. 2 hours. After that rain will not wash it away for at least 2-3 months.
Talstar P (Talstar One) should be applied in the morning or evening especially during the summer. You really just need to focus on the tree line. Spray the undersides of leaves on the trees and shrubs. Focus on debris piles like leaf piles, pinestraw and shaded moist areas. Please see our Mosquito Pest Guide for more information about treating for mosquitoes.
Talstar P (Talstar One) is a great product to use for Bagworms on Pine trees. In fact, it is our number on recommendation for Bag worms. Yes, Talstar will kill insects shortly after they come in contact with it. It is important to keep in mind that bagworms are very difficult to control with chemical methods once they have matured and formed their protective "bags." See our Bagworm Control Page for more details.
Yes, Talstar P will kill any flies that come into contact with a treated surface. You may want to take a look at our Fly Control Guide for more information on treating and preventing this pest.
Mixing too much of an insecticide like Talstar P (Talstar One) is never recommended. Over-application can make an area more repellent, causing insects to avoid it so that the product cannot do its job.