Toxicological impact of Vitex nugendo, Adhatoda vasica and Lantana camara against Pieris brassicae Linn. (Lepidoptera: Pieridae) in field conditions

Field experiments have been conducted on mustard, Brassica juncea at Departmental experimental farm, during rabi season 2010–2011. Alcoholic plant extract tested viz; Acorus calamus Linn., Adhatoda vasica Nees. Allium sativum Linn., Cleome monophylla Linn., Curcuma domesticus Val., Lantana camara Linn., Momordica charantia Linn., Nigella sativa Linn., Ricinus communis Linn. and Vitex nugendo Linn. Three concentrations, 0.5 per cent, 1.0 per cent, 2.0 per cent and one control was replicated thrice and tested against 3^rd instars larvae of cabbage butterfly, Pieris brassicae Linn. The results revealed that all extracts are differed significantly to one another except V. negundo and A. calamus. The mortality percentage of nymph and adult of all plant extract are as: V. negundo (75.6 per cent), A. calamus (71.0 per cent), A. vasica Nees (66.9 per cent), M. charantia (65.6 per cent), R. communis (65.2 per cent), L. camara (64.7 per cent), C. domesticus (64.1per cent), N. sativa(62.5per cent), A. sativum (61.5per cent), C. monophylla (60.9 per cent), respectively.