Vol. 11, Issue 3 (2022)

Author(s):
B Raghavendra, T Srinivas, B Padmodaya, ST Nishanthan and Pallavi NG

Abstract:
In the present study, different herbicides i.e., Quizalofop ethyl (5% EC), Pendimethalin (30% EC) and Imazethapyr (10% SL) were tested against the mycelial growth at four different concentrations (i.e., 100 ppm, 250 ppm, 500 ppm and 1000 ppm) and sclerotial germination of Sclerotium rolfsii in vitro. Effect of different herbicides against mycelial growth of S. rolfsii was tested by means of poison food technique. For evaluating the effect on sclerotial germination, soil was taken into plastic cups and sclerotia of S. rolfsii were mixed with the soil. The soil in the cups was moistened upto saturation with herbicidal solution at recommended dosage and incubated for 10 days, later the germination of sclerotial bodies was observed by placing them on the media. Among the herbicides tested, S. rolfsii was highly sensitive to quizalofop ethyl for both mycelial growth (100% @ 1000 ppm) and sclerotial germination (26.66% @ 0.65%) compared to others. Least sensitivity was observed with imazethapyr at 100 ppm with 21.46% inhibition against mycelial growth and zero per cent inhibition against sclerotial germination.