WHEN IS SEVIN NOT SEVIN?
When is Sevin not Sevin?
Mike Merchant
Texas A&M
February 14, 2018
The name Sevin® has long been associated with flea control in pets, as well as with vegetable garden pest control.
Any gardener who’s been around the block a few times has probably used the insecticide Sevin®, known generically as carbaryl. First introduced to the public in 1956, carbaryl was the first commercially successful product in the carbamate insecticide class. Since then, it has been a pest control workhorse for vegetable gardeners and fruit growers. It’s relatively low cost, broad spectrum activity, and relatively short (usually 3-day) interval between application and harvest made carbaryl a popular choice for growers. Its relatively low oral and skin toxicity to mammals also made carbaryl a favorite treatment choice for on-pet use against fleas.
In recent years, newer, more powerful pyrethroid insecticides have come to dominate store shelves, making carbaryl harder to find. A few years ago the Sevin® trade name was purchased by the pesticide distributor GardenTech. This year, GardenTech is switching the active ingredient in Sevin® Insect Killer from carbaryl to zeta-cypermethrin, a newer pyrethroid insecticide.
According to one industry rep, GardenTech “upgraded” the active ingredient in most Sevin® products to zeta-cypermethrin this year. Sevin® Insect Killer Lawn Granules are changing their active ingredient to bifenthrin + zeta-cypermethrin. The Sevin® Ready-to-Use 5% Dust is not changing immediately. It is still carbaryl, though this may also change.
Manufacturers commonly change ingredients in brand name products; however I can’t recall a similar name change in an insecticide active ingredient so closely tied to a trade name as carbaryl and Sevin®. It will be hard for me to disassociate myself from thinking of Sevin® as anything other than carbaryl. It is something akin to changing the active ingredient in Tylenol® to something other than acetaminophen.
So if you expect to be getting carbaryl the next time you go to the store, look carefully at the label. If it’s a GardenTech product you may be getting a different active ingredient than what you expected. That’s not to say the change will be bad. Zeta-cypermethrin and bifenthrin are both excellent active ingredients with longer staying power than the old carbaryl. In some, if not most, cases, it will likely perform better than carbaryl. But for some pests it may not.
To verify the active ingredient in Sevin® or any other insecticide, look in the list of active ingredients at the bottom of the front label. You should see a generic active ingredient name followed by its percent content in the product by weight. This is one of the first things I look for when shopping for a pesticide. It’s a wise gardener who knows what they’re spraying on their plants.
See attached photo with previous and new product bottles and labels. The bottle on the left is the previous product that contains carbaryl (100 on label) and the one on the right is the new product (500 on label) containing zeta-cypermethrin. These are completely different active ingredients, both called Sevin.
Please remind your clientele to "Read the Label" when using pesticides!
https://citybugs.tamu.edu/2018
All the best.
Gene
Gene McAvoy
President-Elect National Association of County Agricultural Agents
County Extension Director
Regional Vegetable Agent IV
UF/IFAS Hendry County Extension
PO Box 68
LaBelle, Florida 33935
863-674-4092 office
863-673-5939 cell
gmcavoy@ifas.ufl.edu