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Terbufos is a highly toxic organophosphate pesticide and products containing the chemical are labeled dangerous.


Just the facts

Physical Information

Name: Terbufos

Trade Names: AC 92100, Aragran, Contraven, Counter, and Plydox.

Chemical Formula: C 9 - H 21 - O 2 -P-S 3

Use: organophosphate insecticide

Source: synthetic chemistry

Recommended daily intake: none

Chemical Structure

Structure Retrieved from #PAN.


Chemical Description

Terbufos is a clear to slightly brown liquid at room temperature.


Terbufos is formulated as granules and applied at planting or directly on the seed and acts as an insecticide and nematacide (#EXTOXNET and #Haz-Map). It was used to control on wireworms, seedcorn maggots, white grubs, corn rootworm larvae, and other pests on corn, grain, sorghum, sugar beets, and bananas (#EXTOXNET and #Haz-Map).

Health Effects

Main Article: Cholinesterase Inhibitor
Terbufos is an extremely toxic organophosphate insecticide. See the Cholinesterase Inhibitor page for further explanation of the health effects of terbufos.

It also is suspected of having chronic effects as well. #EXTOXNET states "slow thinking, memory loss, irritability, delayed reaction times, and anxiety have been noted in workers chronically exposed to organophosphates like terbufos (#EXTOXNET). Animal studies do not show negative developmental, carcinogenic, or reproductive effects (#EXTOXNET).

External Links


Extension Toxicology Network (EXTOXNET). "Pesticide Information Profile - Terbufos". Revised June 1996. Accessed 9-29-07.

Haz-Map. "Terbufos". Last updated: July, 2007. Accessed 9-28-07.

Pesticides Action Network (PAN). "Terbufos". Accessed 9-27-07.

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