A. K. SAINI*, S. K. SHARMA, ANIL KUMAR AND N. K. YADAV
Department of Plant Pathology, CCS Haryana Agricultural University, Hisar-125 004 (Haryana), India
*(e-mail : anil73.saini@gmail.com)
(Received : November 8, 2016; Accepted : January 10, 2017)
ABSTRACT
Present investigations were undertaken at Chaudhary Charan Singh Haryana Agricultural University, Hisar. Ten botanicals were tested in vitro and in vivo at three concentrations (5, 10 and 20%) against Penicillium islandicum Sopp. causing blue mould rot of Indian gooseberry. Neem (Azadirachta indica) was found most effective in reducing the mycelial growth inhibition at 5 and 10% concentrations, however, maximum inhibition (91.88%) was recorded at 20% concentration under in vitro condition. Neem leaf extract was also observed most effective in vivo at 20% concentration in reducing the blue mould rot severity both in pre-inoculation treatment (7.31 and 10.50%) and post-inoculation treatment (8.13 and 9.19%) at 5 and 10 days, respectively. The figures for pre-inoculation and post-inoculation treatments in control were 35.86 and 39.43%, and 44.98 and 47.78% at these intervals. Haldi (Curcuma longa) bulb extract, ashwagandha (Withania somnifera) and datura (Datura alba) were next best botanicals which were observed effective in both the conditions.
Key words :Aonla, Penicillium islandicum, plant extracts, blue mould rot, disease intensity, inhibitory concentration