There are several species of large roaches, some up to 1 & 1/2 inches long, that are most often found outside. They breed in any type of mulch or compost that is commonly found in your yard. This includes pine bark, pine straw, leaves, dead trees, woodpiles and driveway walls. If these roaches have invaded your home the following control measures should be taken.
Outside spraying: Use a good residual insecticide containing Cypermethrin. Spray a six foot swath all the way around the house and one foot up the foundation wall. You should also spray all the potential entry points into the house such as windows, doors, vents, fireplaces, plumbing, etc. Spraying the roach harborage areas such as retainer walls or hollow trees will also help.
Inside spraying: Spray the areas inside where you have noticed the roaches. Pay special attention to any areas of your home where there is water. This includes the refrigerator, air conditioner, dishwasher, laundry room and all of the plumbing. For continuous roach control.....................
SPRAY OUTSIDE EVERY MONTH AND INSIDE EVERY 3 MONTHS.
Viper 4 ounce makes 4 gallons of finished Cypermethrin solution. Click the cypermethrin link to see other sizes.