2016, Vol. 3 Issue 1, Part B
Insecticidal biopotentials of Ageratum conyzaides, Azadirachta indica and Chenopodium ambrosioides essential oils against leaf webber, Eucosma critica Meyrick (Lepidoptera: Eucosmidae)
Author(s): Rajani and BS Chandel
Abstract: The intensive and indiscriminate use of insecticides in agriculture has caused many problems and contaminated with water, air and soil causing environmental pollution and hazaourdous to human health and beneficial organisms. The present study was carried out to evaluate the larvicidal properties of eleven indigenous botanicals growing abundantly in the vicinity of Kanpur region of U.P., India. The eleven edible and non-edible oils and one synthetic insecticide ie; Ageratum conyzaides Linn., Argemone maxicana Linn., Arachis hypogea Linn., Azadirachta indica A. juss., Brassica juncea Linn., Chenopodium ambrosioides Linn., Mentha arvensis Linn., Mentha longifolia Linn., Ocimum basilicum Linn., Pongamia glabra Vent. Ricinus communis Linn. and Endosulphan were studied against 3rd instar larvae of Eucosma critica Meyrick (Lepidoptera: Eucosmisdae). The laboratory trial was done in three glass petridishes (10cm diameter) and replicated thrice by using each selected extracts per petri-dish. To record the ten larvae of E. critica were released inside each pair of petri-dishes and allow them to remain for 24 hours. These petri-dishes were kept as such under control conditions 27+ 1.00 C0 and Rh 75+ 5 and mortality count was taken after 6h, 12h, 24 hours of exposure peroids. The plant oils of A. conyzaides gave the best results when compared with the remaining ten extractives. The A. conyzaides extract gave the 78.10 per cent larval mortality, which is followed by A. indica (76.05 per cent), C. ambrosioides (73.40 per cent), R. communis (69.94 per cent), Endosulphan (71.41 per cent), P. glabra (68.01 per cent), O. basilicum (65.33 per cent), A. maxicana (57.50 per cent), M. arvensis (51.91 per cent), M. longifolia (50.97 per cent), B. juncea (61.42 per cent) and A. hypogea (37.15 per cent) etc. The plant oils of A. conyzaides differs significant from remaining once except A. indica, whereas, Endosulphan, P. glabra, O. basilicum, A. maxicana, M. arvensis, M. longifolia, B. juncea and A. hypogea, respectively. which, does not differ significantly to one another. A. hypogea proved least toxic giving only 36.5 per cent mortality of the larvae of Eucosma critica.
Pages: 143-150 | 47 Views 4 Downloads
How to cite this article:
Rajani and BS Chandel. Insecticidal biopotentials of Ageratum conyzaides, Azadirachta indica and Chenopodium ambrosioides essential oils against leaf webber, Eucosma critica Meyrick (Lepidoptera: Eucosmidae). International Journal of Fauna and Biological Studies. 2016; 3(1): 143-150.