In vitro Screening of the New Strobilurin Fungicide Pyraclostrobin 20% WDG and Biocontrol Agents against Aspergillus niger (Van Tieghem) Causing Collar Rot in Groundnut


  • Deemed University, Gandhigram Rural Institute, Dindigul, Tamil Nadu, 624 302, India


The in vitro experiment revealed that the fungicide pyraclostrobin 20% WDG at 0.1%, 0.15% concentrations and carboxin + thiram 75% WS (Vitavax) at 0.2% conc. completely inhibited the mycelial growth of Aspergillus niger and accounted for 100% inhibition of the pathogen followed by carbendazim @ 0.1% ( 98.42% ), mancozeb @ 0.2% (94.51% ) and pyraclostrobin 20% WDG at 0.5% (98.46% ). Pseudomonas fluorescens recorded the higher inhibition of the pathogen as compared to Trichoderma harzianum. The present study clearly revealed that the fungicide pyraclostrobin 20% WDG at 0.1% and 0.15% completely inhibited the pathogen A. niger.


Pyraclostrobin, Aspergillus niger, Groundnut, Collar Rot, Screening.

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