Pyrethroid Label Restrictions are Tough. Use Products that are Tougher

October 2016


This year produced a long, hot summer!  And with Zika concerns escalating, your phone has been ringing non-stop since spring! It seems like business has been moving at a fast pace all year. Right about now, you’re looking forward to being able to catch your breath with autumn and the NFL season settling in, because the fall’s cooler temperatures hold the promise that the pests might start to slow down.  Or will they?…


Turns out, the warm, wet summer that brought out mosquitoes, cockroaches and ants was perfect for building up huge populations of stink bugs, boxelder bugs, and Asian lady beetles. So, as cooler weather closes in, you’ll start fielding hundreds of calls from homeowners whose houses are being invaded by tens of thousands of these pests that are seeking shelter from the coming winter. Then, you’ll sit back, breathe a heavy sigh, and quietly accept your fate, knowing that, through as late as Thanksgiving, you will be every bit as busy as you were all summer….


Kudzu bugs on down spout
Kudzu bugs on down spout.
Photo courtesy of Dr. Daniel Suiter, University of Georgia
In most parts of the country, the fall or “occasional” invader season is an important part of the pest management calendar. An industry researcher estimated this line of business generated more than $650 million dollars in revenue last year. While this piece of the pest management business has been stronger in northern states, with the emergence of the invasive kudzu bug, many southern states are now getting in on the action.


Historically, this service was pretty simple to execute - you brought out the big equipment and generously sprayed all of the exterior surfaces of the home or building with a general-use insecticide. That way, as pests descended on the structure, you had created a wide zone of residual control that killed them before they got inside the house and caused problems. However, with pyrethroid label restrictions, controlling fall invading pests became anything but routine.


Pyrethroid labels restricted where you could apply sprays on the exterior of a structure. Generally, you couldn’t make applications to the outside of a building above three feet off the ground, unless the surface was permanently protected from rainfall by an overhang or awning like those of eaves, soffits, or the areas around doors or windows. Everywhere else, to protect pest entry points on a building, a surface could only be “spot” treated or addressed using a so-called “band” treatment no more than 1 inch wide. The old days of power spraying the sides of a building to stop fall pests were over.


In 2013 EPA did somewhat soften these restrictions, allowing treated surfaces to exceed the spot or band limits if the area is above bare soil, lawn, turf, mulch or other vegetation, and when fall- invading pests are present. Treatment of areas above impervious surfaces (driveways, sidewalks, etc.) is still prohibited and preventive treatment to areas of the structure above three feet that are exposed to rainfall is not encouraged.


These restrictions make controlling home-invading pests harder because you’re limited in where you can apply insecticide on a building’s exterior to kill them before they get inside. That’s why it’s important to apply the very best products you can.  Two Bayer products, Temprid® and Suspend® PolyZone®, offer unique advantages that make treating for fall or occasional invaders more successful in spite of these restrictions.




Stink bug infestation prior to Temprid treatmentStink bug infestation prior to Temprid treatment.
Photo courtesy of Kevin Connally, Bayer

In Temprid, you get a proven performer that delivers fast knock-down and long residual. Temprid long ago established itself as the only perimeter product your company needs. Its speed of kill is due to a unique fusion of imidacloprid plus beta-cyfluthrin, which means that pests are exposed to two active ingredients on treated surfaces. When you can no longer make general surface applications, those remaining areas that you can treat need to have greater stopping power and that is exactly what Temprid was designed to deliver!


Temprid performance chart


In the above-referenced study (OE08NARBYF, OE09NARB71), we exposed a variety of ants and crawling pests to surfaces treated with Temprid or other leading sprays. The exposure time was less than 1 minute, and even with such limited exposure, Temprid worked faster than all of the products, delivering the rapid stopping power to kill the invading pests at entry ways like door frames, window frames, soffits, etc.


Suspend PolyZone:


The restrictions on pyrethroid use were prompted by concerns of rainfall-driven runoff from surface treated in urban environments. The science behind Suspend PolyZone was designed to meet this challenge. Suspend PolyZone polymer technology protects the active from irrigation, precipitation and mechanical abrasion. So, in critical application sites, you can depend on Suspend PolyZone still being there to control the pests. And unlike other residual sprays, Suspend PolyZone has up to a 90-day outdoor residual under tough conditions that is unmatched when compared to other SC’s and microcaps. When restricted in where you can treat, it’s important to use a product that will stay put on those outdoor application sites.


So, remember when the phone keeps ringing well into autumn, as homes and businesses in your town are being overrun by fall or occasional invading pests, you can rely on Temprid and Suspend PolyZone to solve your customers’ problems … and maybe even let you catch up on some of that sleep you lost during the hot, crazy summer of 2016!



Bayer, the Bayer Cross, Temprid, Suspend and PolyZone are registered trademarks of Bayer. Phantom and Termidor are trademarks of BASF. Transport is a trademark of Nippon Soda Co., Ltd. Arilon, and Optigard are trademarks of Syngenta. Always read and follow label instructions.

Byron Reid

Senior Principal Scientist


Meet Byron Reid


As a third generation urban pest control specialist, Byron Reid comes by his fascination with bugs naturally. As our Principal Scientist, he’s also a natural for developing new products and active ingredients. In his more than three decades in the industry, he’s led the advancement of countless innovations. He’s also a serious landscaper.


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