Impact of abiotic factors on Lipaphis erysimi on different Oleiferous Brassicas
97 / 0
Keywords:
Lipaphis erysimi, Brassica, life table, abiotic factorsAbstract
The survivorship was stair step curve of type I on all Brassica species at all temperature (15, 20, 25oC) and photo periods (6, 9 hours). The intrinsic rate of natural increase ‘rm’ for Lipaphis erysimi on Brassica juncea (0.1245- 0.1908) was the highest followed by B. alba (0.1373-0.1741), B. campestris (0.0964-0.1707), B. carinata (0.1068- 0.1590), B. napus (0.1222-0.1581), B. nigra (0.0873-0.1496) and lowest on Eruca sativa (0.0469-0.1389) at field and laboratory conditions at different temperature and light hours. At field and at different temperature and light hours (laboratory conditions) the intrinsic rate of increase ‘rm’ was recorded higher at field 2008-09 (0.1205- 0.1707) followed by at 250C and 9h (0.1343-0.1922), at 150C and 9h (0.1069-0.1908), at 200C and 6h (0.1114- 0.1615), at field 2007-08 (0.1311-0.1529), at 200C and 9h (0.1258-0.1644) and lowest at 150C and 6h (0.0964- 0.1373) for L. erysimi on different Brassica species. Based on intrinsic rate of increase ‘rm’ it can be concluded that B. juncea was the most suitable oleiferous Brassica for L. erysimi while development on E. sativa was least suitable. The field condition prevailing in year 2008-09 was most suitable but 150C temperature and 6h light duration was least suitable for L. erysimi growth and development.
Downloads
Submitted
Published
Issue
Section
License
Manuscript will be accepted on the understanding that their content is original and that permission has been received in writing wherever necessary to produce previously published material (including quotations, data and illustrations) and that the manuscript has not been submitted/ accepted for publication elsewhere. Copyright resides with the Plant Protection Association of India.