Bryan from Tx writes
In a commercial restaurant, I'm dealing with pyrethroid resistant German Roaches. I've used the Alpine roach bait with decent results before. I'm wondering if Alpine dust would do better than Deltadust in the wall voids, since they are resistant to pyrethroids, even when mixed with PBO. I've used pyrethrin, PBO (Exponent), Fenvastar plus, and Gentrol in my Actisol. I've seen limited results, even when using an oil base. I've pressure dusted Deltadust into a majority of the wall voids, and a few are coming out and dying, but I'm still seeing too many to believe I've gotten decent control. They even laugh at Cyzmic CS.
Alpine Dust could be used in place of DeltaDust but with roaches baits are the most effective part of treatment or using a spray such as Phantom that works like a bait in that it has a transfer effect back to the colony. All the sprays/dusts you have used only kill those that contact a treated area or that are sprayed directly (pyrethrin/PBO). It can take weeks/months to completely eliminate a roach infestation especially in a commercial setting where food/water could be available, so proper santitation and good housekeeping are a key part of treatment. We have a guide here that can help as well.
Answer last updated on: 02/12/2020
