Talstar P is safe if applied and dried prior to children entering the treated surfaces. If the treated area gets wet again, it does not reactivate the product.
We generally recommend using a pyrethroid such as Talstar P Professional Insecticide or Permethrin SFR as a preventative treatment in late spring/summer before egg hatch to protect trees. If trees are badly infested, then they should be removed and either chipped or burned.
Keep in mind that trees which become infested with bark beetles are almost always susceptible due to some other existing weakness such as drought or disease.
Talstar P Professional Insecticide needs to be watered in for some pests but not all. Please review the product label for complete application information depending on your target pest.
We apologize that there appears to be fungus like substance in your bottle of Talstar P. There was an issue with one Lot of 3/4 gallon Talstar from FMC last year. We would be more than happy to ship you a new bottle or refund you for this bottle from the defective Lot. You can call us at 866-581-7378 to follow up of this matter up.