Effect of cow urine decoction of some plants on growth and development of Lipaphis erysimi (Kaltenbach)
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Date
2009-06
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present investigation was undertaken to study the effect of cow urine decoction of 33 plant species on growth and development of Lipaphis erysimi (KALTENBACH) at three different concentrations.
Among different CUDs used Achyranthus aspera, Ageratum conyzoides, Cyperus rotundus, Duranta erecta, Allium sativum, Cynodon dactylon and Cyperus rotundus were found to be most effective for reducing nymphal period, nymphal survival, pre reproduction period, reproduction period, post reproduction period, fecundity per female and total life span respectively.
Various parameters of growth indices were showed that the nymphal index was minimum for Hibiscus rosa-chinensis. Azdirachta indica was found to be least suitable for growth and development of aphids having lesser Howe’s index, survival index and success index value.
Reproduction index was lowest in Nerium indicum at all concentrations (i.e.1%, 3% and 5%).
On the basis of growth and development indices it was concluded that Azdirachta indica was the best among all CUDs used.
Thus it was concluded that all the above CUDs were found to be less suitable for growth and development of aphid with respect to the control.