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Efficacy Of Some Indigenous Plants In Controlling Vector Snails Of Trematode Parasites Of Medical And Veterinary Importance

I. S. Shanta, A. T. M. Anisuzzaman, Uk Mohanta, Thahsin Farjana, Md. Motahar Hussain Mondal
Published 2008 · Biology

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To study molluscicidal effects of some indigenous plants such as Dhol Kalmi (Ipomoea fistulosa), Lantana (Lantana camara), Rakta-karabi (Nerium indicum), Polash (Butea frondosa), Mohavringoraj (Wedelia calandulacea), Nishinda (Vitex negundo), Bishkatali (Polygonum hydropiper), Kalmi, (Ipomoea aquatica), Haicha ( Alternanthera sessilis) and Shaora (Streblus asper) were used as dusts, aquatic, ethanol and methanol extracts against Lymnaea auricularia, Lymnaea luteola and Indoplanorbis exustus to give in vitro trial from January 2006 to December 2006 in the Department of Parasitology, Bangladesh Agricultural University, Mymensingh. All the plants in all preparations were more or less effective against the treated snails. In this study, LD50, Min.Cs100 and mortality percentage of fish (Gutum, Letidocephalus guntea, Family: Cobitidae) were determined using dust of the selected plants. LD50 was minimum in case of Haicha (14.3mg/L) followed by rakta-karabi (29.25mg/L), bishkatali (46.88mg/L), kalmi (154.69mg/L), lantana (234 mg/L) etc. Min.Cs100 was minimum in case of rakta-karabi (0.008%) followed by haicha (0.03%), lantana (0.06%), dholkalmi (0.25%) and kalmi (0.25%). Among the plants, lantana, haicha and kalmi had no lethal effect on fish at Min.Cs100. Shaora also had no toxic effect on fish but its both LD50 (453.13mg/L) and Min.Cs100 (1%) were very high. Present study suggests that dust of haicha, lantana and kalmi may be used @ 0.03%, 0.06% and 0.25% respectively to control snails in field level.
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