The Bioscan, 4(3): 395-398, 2009
An International Quarterly Journal of Life Sciences
web site: www.thebioscan.in 
EFFCT OF SNAIL ATTRACTANT PELLETS CONTAINING PLANT MOLLUSCICIDES 
ON CERTAIN ENZYMES IN THE NERVOUS TISSUE OF 
LYMNAEA ACUMINATA (LAMARK)
PREETI SINGH, PRADEEP KUMAR, V. K. SINGH AND D. K. SINGH*
Department of Zoology, D.D.U. Gorakhpur University,
Gorakhpur - 273 009, U.P., INDIA
E-mail: dksingh_gpu@yahoo.co.in


KEY WORDS
Fascioliasis
Lymnaea acuminata Plant molluscicides Alkaline
Phosphatase Acetylcholinesterase
Received on: 11.05.2009 Accepted on: 29.07.2009 *Corresponding Author

ABSTRACT

Snails fed with sub-lethal concentration of different molluscicides piperine (an active component of Piper nigrum), oleoresine (an active component of Zingiber officinale) and thymol (an active component of Trachyspermum ammi) inside the snail attractant pellets (SAP) caused a significant inhibition in acetylcholinesterase and alkaline phosphatase activity in the nervous tissue of the vector snail Lymnaea acuminata. Combination of sucrose+starch or sucrose+serine or praline+serine was used as attractant with active molluscicidal components. Maximum inhibition of AChE (52.66% of control) and alkaline phosphatase (56.32% of control) activity was observed in the nervous tissue of the snail Lymnaea acuminata exposed to 40% and 80% of 24h LC50 of thymol incorporated in the pellets containing sucrose+starch as attractant.