Author(s):

VR Dhepe, GK Lande, Jayashri D Ughade and UP Barkhade

Abstract: Field trial was conducted during Kharif season in two consecutive years with twelve microbial treatments against the foliage feeder of soybean crop. On the basis of two years pooled data per cent larval reduction of larval population of Spodoptera litura among the different treatment were found significant over control. Among these treatment Beauveria bassiana 5 g/l recorded 63.62 per cent larval reduction was found to be the most effective treatment followed by B. bassiana 4 g/l recorded 51.90 per cent larval reduction and was at par with B. thuringiensis 3 g/l, B. thuringiensis 2 g/l and N. rileyi 6 g/l which recorded 51.76, 50.45 and 49.11per cent larval reduction. Similarly per cent reduction of Thysanoplusia orichalcea also varied significantly after 3^rd, 7^th and 14^th days of spraying. The highest larval reduction was exhibited by B. bassiana 5 g/l with 65.29 per cent reduction after 7^th day of spraying followed by B. thuringiensis 3 g/l, B. bassiana 3 g/l and B. bassiana 4 g/l recording 53.94, 53.95 and 52.33 per cent reduction respectively. All the treatment recorded significantly higher yield over control. It was highest in the treatment B. bassiana 5 g/l (23.77 q/h) with highest incremental cost benefit ratio of 13.44 over the control.

Pages: 1347-1350  |  1006 Views  246 Downloads

Download (448KB)