A
nematicide is a type of
chemical pesticide used to kill plant-
parasitic nematodes. Nematicides have tended to be broad-spectrum toxicants possessing high volatility or other properties promoting migration through the soil. Temik (
Aldicarb), a
carbamate insecticide marketed by
Bayer CropScience, is an example of a commonly used commercial nematicide. It is important in
potato production, where it has been used for control of soil-borne
nematodes. Aldicarb is a
cholinesterase inhibitor, which prevents the breakdown of acetylcholine in the synapse. In case of severe poisoning, the victim dies of respiratory failure. It is no longer authorised for use in the EU and, in August, 2010, Bayer CropScience announced that it plans to discontinue Aldicarb by 2014. Human health safety and environmental concerns have resulted in the widespread deregistration of several other agronomically important nematicides. Prior to 1985, the persistent
halocarbon DBCP was a widely used nematicide and soil
fumigant. However, it was banned from use after being linked to
sterility among male workers; the
Dow Chemical company was subsequently found liable for more than $600 million in damages.