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Biological Control
Volume 158, 2021, 104597

Bacteriophage liquid formulation: A potential green tool for the management of pomegranate bacterial blight

Smita Jagdale, Balu Kapadnis

Department of Microbiology, Savitribai Phule Pune University, Ganeshkhind, Pune 411007, Maharashtra, India.


Pomegranate is one of the majorly grown fruit cash crops in India. For the past few decades, it has been observed suffering from bacterial blight disease, hampering the growers' economic benefits. The present study aimed to evaluate bacteriophage-based liquid formulation's potential in managing pomegranate bacterial blight disease caused by Pseudomonas sp. Isolated two phages (vB_Psp.S_PRɸL2 and vB_Psp.M_SSɸL8) against the etiology of pomegranate bacterial blight disease were used for the biocontrol study. Phage based different liquid formulations were developed and evaluated for six month shelf life period at 4 ° and 30 °C temperatures. Among studied liquid formulations for both the phages, the 0.5% whitening clay was found to maintain the most active phage titre. Foliar spray of 0.5% whitening clay liquid formulation of the phages PRɸL2 and SSɸL8 efficiently reduced the pomegranate bacterial blight disease compared to standard streptocycline. Moreover, the preventive application of phages based 0.5% whitening clay liquid formulation showed promising results in the pot experiment under greenhouse conditions.

Keywords: Bacteriophage, Pomegranate, Bacterial blight, Pseudomonas sp., Liquid formulation, Preventive application.

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