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International Journal of Farm Sciences
Year : 2012, Volume : 2, Issue : 1
First page : ( 72) Last page : ( 78)
Print ISSN : 2229-3744. Online ISSN : 2250-0499.

Repellent effect of some plant extracts against Pieris brassicae (Linn)

Sharma Anurag*, Gupta Rakesh1,  Reecha2

Indian Institute of Advanced Study, Shimla-171 005, HP

1Directorate of Extension Education, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan, HP

2Department of Horticulture, Chambaghat, 173213, Solan, HP

*Email for correspondence: anu_rich@yahoo.co.in

Online published on 25 July, 2018.

Abstract

The aqueous extract of eight plant species, namely Azadirachta indica, A Juss, Melia azedarach L, Lantana camara L Moldenke, Cannabis sativa L, Nerium indicum Mill, Eucalyptus sp, Ricinus communis L and Solanum nigrum L were tested for repellent effects against Pieris brassicae. The ethanol extracts of potential plants were further tested for their biological activity against the test insect. The aqueous extracts of A indica and M azedarach resulted in statistically higher repellent effect repelling 2.2–50.4 and 4.4–52.6 per cent second instar larvae of P brassicae respectively. In case of ethanol extract also seed extracts of A indica and M azedarach were highly effective against P brassicae giving statistically higher repellent (15.1% and 13% respectively) effects as compared to other plant extracts. In general repellent effect was dose dependent and diminished with the passage of time.

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Keywords

Repellent effect, Pieris brassicae, plant extracts.

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