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Related Experiment Video

Updated: Jun 21, 2025

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Encapsulated Predatory Bacteria Efficiently Protect Potato Tubers from Soft Rot Disease.

Gal Sason1,2, Errikos Chalegoua2,3, Manoj Pun2,3

  • 1Department of Plant Pathology and Microbiology, Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel.

Plant Disease
|July 14, 2024
PubMed
Summary

A new formulation using encapsulated predatory bacteria, *Bdellovibrio bacteriovorus*, effectively protects potato tubers from destructive soft rot Pectobacteriaceae (SRP) pathogens. This stable, long-lasting treatment offers a promising solution for managing potato soft rot disease.

Keywords:
BdellovibrioPectobacteriumbiocontrolencapsulationhydrocolloidspredation

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Area of Science:

  • Plant Pathology
  • Microbiology
  • Biotechnology

Background:

  • Soft rot Pectobacteriaceae (SRP) are significant potato pathogens causing substantial crop losses.
  • Current management strategies for SRP are limited, necessitating novel control approaches.

Purpose of the Study:

  • To develop and evaluate a novel formulation for protecting potato tubers against SRP using encapsulated predatory bacteria.
  • To assess the stability, efficacy, and protective potential of the encapsulated *Bdellovibrio bacteriovorus* formulation.

Main Methods:

  • Development of a carrageenan-trehalose-based polymeric carrier for encapsulating *Bdellovibrio bacteriovorus* HD100.
  • Evaluation of formulation stability over 18 months at room temperature.
  • Testing the efficacy of the rehydrated formulation in preventing soft rot in potted potato tubers under controlled and natural conditions.

Main Results:

  • The encapsulated formulation demonstrated high stability over 18 months at room temperature, unlike unencapsulated bacteria.
  • Rehydrated formulation provided protection comparable to fresh predators, reducing disease parameters by an average of 50% within 7 days.
  • Protective effects were sustained in longer-term trials (28 days) under natural conditions.

Conclusions:

  • Encapsulated *Bdellovibrio bacteriovorus* in a carrageenan-trehalose formulation offers a stable and effective method for controlling potato soft rot.
  • This approach presents a viable, eco-friendly strategy for practical field application against SRP.
  • The formulation enhances the persistence and efficacy of predatory bacteria for plant disease management.