Inhibition and Recovery Kinetics of Acetylcholinesterase Activity in Drawida calebi and Octochaetona surensis, the Tropical Earthworms, Exposed to Carbaryl Insecticide.

The article presents a study conducted by the Department of Environmental Sciences in Sambalpur University in Orissa, India on the inhibition and recovery kinetics of Acetylcholinesterase (AChE) activity in two tropical earthworms, Drawida calebi and Octochaetona surensis, exposed to carbaryl insecticides. The study reveals that D.calebi is more susceptible to carbaryl toxicity with higher rate of inhibition in AChE activity as compared to O.surensis. However, the rate of recovery from the insecticide stress was rapid in D.calebi as compared to O.surensis. Researchers believe that monitoring of AChE activity in earthworms can serve as a bioindicator to pesticide pollution in the soil subsystem.