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Evaluation of Pseudomonas fluorescens against Phomopsis Canker Disease in Tea Plants

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Author(s): Kanimozhi. | Ponmurugan. P

Journal: Advanced Biotech
ISSN 0973-0109

Volume: 12;
Issue: 11;
Start page: 12;
Date: 2013;
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Keywords: Tea | Camellia sinensis | Phomopsiscanker | biocontrol agents | Pseudomonas fluorescens

ABSTRACT
Phomopsis canker disease in plants is a serious problem in southern Indian tea estates especially in Anamallais tea planting areas. In order to control the disease under field condition, tea planters are using systemic fungicides and fungal biocontrol agent like Trichoderma atroviride. But no attempt has been made to use bacterial biocontrol agent like Pseudomonas fluorescens. To keep in mind, this study has been undertaken. The results revealed that among the various treatments, soil application and wound dressing of an indigenous P. fluorescenswas found to be superior to fungicides and T. atroviride in controlling Phomopsis canker especially in cut-across pruned fields. Various treatments healed the wound to varying degrees and improved the plant as well as soil health. The bud break, tipping weight and green leaf yield were increased in plants to a larger extend after treatments. Similarly, plant morphological, biochemical and physiological parameters were also improved in varying degrees in tea bushes after imposing various treatments. In the case of untreated control, the canker size was increased and the plants were found unhealthy in terms of yellowing of leaves and stunted growth with heavy flowering.
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