[Molluscicidal activity of seed of Camellia sinensis]

This paper is a preliminary report on the molluscicidal activity of seed of Camellia sinensis (L) O. Kuntze (SCS). Its LD50 and LD90 were 10 and 16 micrograms/ml, respectively. We found also SCS inhibited oxygen consumption 65% and glycogen content of Oncomelania snail by 80%. The activity of hatching eggs to juvenile snails was inhibited by this seed at 8-16 micrograms/ml. Juvenile snails may also be killed by this molluscicide.