Control of Colletotrichum fructicola on strawberry with a foliar spray of neutral electrolyzed water through an overhead irrigation system

Abstract

Neutral electrolyzed water (NEW: pH 6.5–7.5) applied through an overhead irrigation system was evaluated for control of strawberry anthracnose caused by Colletotrichum fructicola. Conidia of the pathogen were completely killed by a 10-s exposure to 10.0 mg/L of available chlorine in the NEW. Disease suppression was significantly higher using the NEW treatment through overhead irrigation, either alone or combined with fungicides, than using conventional fungicides. Plants had no visible phytotoxicity after the NEW treatment, even when combined with fungicides. Thus, the NEW treatment was effective at controlling anthracnose caused by C. fructicola.

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Acknowledgments

We are grateful to Dr. Janice Y. Uchida and Dr. Naoyuki Matsumoto for their critical review and valuable comments on an earlier version of this manuscript and to Dr. Toyozo Sato for his valuable comments on the latest taxonomy of Colletotrichum. We also thank Kana Ueda for her technical assistance.

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Correspondence to Yoshihiko Hirayama.

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Hirayama, Y., Asano, S., Watanabe, K. et al. Control of Colletotrichum fructicola on strawberry with a foliar spray of neutral electrolyzed water through an overhead irrigation system. J Gen Plant Pathol 82, 186–189 (2016). https://doi.org/10.1007/s10327-016-0667-6

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Keywords

  • Colletotrichum fructicola
  • Neutral electrolyzed water (NEW)
  • Overhead irrigation
  • Fungicide application
  • Strawberry anthracnose