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Table 1: Percent repellency of hexane extract of tuber of root of Cyperus rotundus Linn against three important mosquito vectors.

Species Replicate Doses % Repellency in hours 0 hour 1 hour 2 hours 4 hours 6 hours An. culicifacies (3) Tre- 2.5 80 75 88 90 95 Tre- 5 88 90 90 96 99.2 Tre- 10 97 96 97 100 100 Deet 2.5 98 100 100 99 100 An. stephensi (3) Tre- 2.5 84 80 85.3 90 96 Tre- 5 89 88.7 92.0 95 99 Tre- 10 99.6 93.0 93.0 99 100 Deet 2.5 96.7 100 90 99 100 Cx. Quinquefasciatus (3) Tre- 2.5 83.5 75 82.3 91.7 95.8 Tre- 5 89.2 89.7 93 95 99 Tre- 10 89.6 96 95.5 99 100 Deet 2.5 96.6 100 100 96.7 100

R- no of ReplicateN- no of mosquito