These substances will either kill the roaches by poisoning them and any roaches they come in contact with at the hive or act as an IGR insect growth regulator by sterilizing them. Some sprays can even do a little of both. Lethal residuals commonly use cypermethrin or some other member of a synthetic class of chemicals called pyrethroids. Some common IGRs include hydroprene or methoprene. Doorways or baseboards are usually a good bet. Some of the best residual roach killers can only be used in certain areas, so pay attention to the ingredients and user guides.
Products containing diatomaceous earth are especially popular and effective at sticking to roach legs, but the substance has to stay dry to work. Needless to say, that limits its use outdoors. Non-residual sprays are a more immediate solution. Pyrethroids are another go-to ingredient in these sprays, but they are formulated more differently and are meant to kill on contact.
Again, try to avoid using these on kitchen countertops or near pets or small children. Once you see one roach, you can be sure there are more. A better strategy might be a multi-pronged approach. Non-residual sprays with a thin nozzle attachment are great for flushing cockroaches out of corners or cracks, right onto areas where you may have laid down a residual layer of insecticide.
You can use this same process with bait traps or other non-spray forms of pest control. The more weapons you have against roaches, the better. Just make sure to use them wisely. Look for the DWYM seal for products that are the best in the category. Show Contents. Check Price. Overall Take This sprayer is a great long term solution for defense against not just roaches but several types of insects.
For the full ranking, see below. Expert Reviews Expert Summarized Score 8. Ortho Home Defense Max - does it work?? Have you used Ortho Home Defense Max to keep ants out of your house?
The manufacturer says one application per season is enough. If you have any feedback, positive or negative, please post. Though it's cheaper than hiring an exterminator, it requires alot of work - so I'd like to know if it's worth my time before I do it. Reply to siralfred. Notify me about replies to my post Post Reply.
Show Quoted Text. Reply to cowboy. Every product comes with these settings outdoor and indoor settings. The major difference between indoor and outdoor applications is the band spacing to be covered with this chemical. Unlike an indoor application that required making a 4-inch band around target areas, an outdoor application will require wider coverage. All such target surfaces should also be sprayed to be slightly wet.
One of such is water supply and water bodies. This is because Ortho Home Defense is toxic to humans. Avoid spraying this pesticide in the air as well as on animals.
Here is an article that discusses Ortho Home Defense safety guidelines. They include yellowjackets, spittlebugs, whiteflies, springtails, wasps, stink bugs, termites, stored product pests, and ticks.
Others include thrips, plant bugs, spiders, psyllids, sowbugs, sawflies, silverfish, scales, scorpions, and mole crickets. Leaffooted bugs, midges, leafhoppers, mealybugs, leaf miners, leafrollers, fungus gnats, and grasshopper issues can be contained. The same applies to beetles, adelgids, bees, ants, aphids, and several other species of these pests. Its application takes care of a wide range of issues especially when multiple pests are involved. Ortho Home Defense comes with a guarantee which gives added confidence about product reliability.
Customers who are unsatisfied with treatment have the opportunity of mailing their proof of purchase to the manufacturer.
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