The Biobrio 13(1 & 2), 2026

Piscicidal effect of Polygonum hydropiper on Catla Catla

Anshu Prabha & Arun Kumar

ABSTRACT:

Piscicidal effect of Polygonum hydropiper leaf was examined in Catla catla fish collected from local fisherman of Madhepura. LC50 value was recorded as 12mg/l extract of Polygonum leaves. Percent mortality response of fishes in extract was recorded during 24H, 48H, 72H and 96H. Percent mortality response during 96H was recorded as 10%, 20%, 40%, 40%, 60%, 70%, 80% and 100% in concentration of 11mg/l, 11.5mg/l, 12mg/l, 12.5mg/l, 13mg/l, 13.5mg/l, 14mg/l, 14.5mg/l and 15mg/l respectively. In concentration of 14.5mg/l and 15mg/l of extract death of fish occurred within 24Hrs. While in concentration of 14mg/l, death of fish occurred during 48Hr. Physicochemical analysis of different concentration of extract was examined. It was observed that temperature of extract in different concentration remain constant (27oC) but pH and DO gradually decrease from lower concentration to higher concentration. E.C. gradually increased from lower concentration to higher concentration. Fish behavior was observed in LC50 concentration at every 12 hours.

Keywords:    

Piscicidal effect, physicochemical analysis, Polygonum.

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