The efficacy of selected plant extracts and bioflavonoids in controlling infections of Saprolegnia australis (Saprolegniales; Oomycetes)

S. Caruana, G. H. Yoon, M. A. Freeman, J. A. Mackie, A. P. Shinn

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Saprolegnia infections can account for the significant loss of salmonid eggs and adults in breeding condition and although there are a number of chemical agents available to control infections in hatcheries, treatment is difficult and there are reservations regarding their efficacy, prompting a search for suitable replacements. Here, the efficacy of 24 crude plant extracts and 3 bioflavonoids on the growth of . Saprolegnia australis were assessed using an in vitro agar diffusion method against a set of synthetic chemotherapeutants commonly used within the aquaculture industry. The 12 best extracts inhibiting growth at ≤. 100. ppm, were then added to cultures of . S. . australis in a GP broth and the daily growth was monitored spectrophotometrically over a 7-day period. All 12 plant extracts reduced growth, however, only . Atractylodes macrocephala, . Zingiber officinale seed, . Chrysanthemum and . Yucca were as effective as 10. ppm malachite green in slowing growth. A subsequent trial, where doses of the plant extract were given at 72 and 120. h post-inoculation, found that . Rumex obtusifolius, . Sophora flavescens, . Echinacea and . Z. . officinale were the most effective compounds impacting growth. The study demonstrates that certain plant extracts impact on the growth dynamics of . S. . australis but further research is required to assess their performance in vivo.

Original languageEnglish
Pages (from-to)146-154
Number of pages9
JournalAquaculture
Volume358-359
DOIs
Publication statusPublished - Aug 15 2012

Fingerprint

Saprolegniales
bioflavonoids
Saprolegnia
plant extract
Oomycetes
plant extracts
infection
Atractylodes
Sophora flavescens
Rumex obtusifolius
Echinacea
malachite green
Yucca
Zingiber officinale
Chrysanthemum
hatcheries
disease control
agar
aquaculture industry
malachite

Keywords

  • Antifungal activity
  • Fish pathogen
  • Fungal infection
  • Salmonids
  • Water mould

ASJC Scopus subject areas

  • Aquatic Science

Cite this

The efficacy of selected plant extracts and bioflavonoids in controlling infections of Saprolegnia australis (Saprolegniales; Oomycetes). / Caruana, S.; Yoon, G. H.; Freeman, M. A.; Mackie, J. A.; Shinn, A. P.

In: Aquaculture, Vol. 358-359, 15.08.2012, p. 146-154.

Research output: Contribution to journalArticle

@article{509e14bd67054a17b7ba3c0b38c8399c,
title = "The efficacy of selected plant extracts and bioflavonoids in controlling infections of Saprolegnia australis (Saprolegniales; Oomycetes)",
abstract = "Saprolegnia infections can account for the significant loss of salmonid eggs and adults in breeding condition and although there are a number of chemical agents available to control infections in hatcheries, treatment is difficult and there are reservations regarding their efficacy, prompting a search for suitable replacements. Here, the efficacy of 24 crude plant extracts and 3 bioflavonoids on the growth of . Saprolegnia australis were assessed using an in vitro agar diffusion method against a set of synthetic chemotherapeutants commonly used within the aquaculture industry. The 12 best extracts inhibiting growth at ≤. 100. ppm, were then added to cultures of . S. . australis in a GP broth and the daily growth was monitored spectrophotometrically over a 7-day period. All 12 plant extracts reduced growth, however, only . Atractylodes macrocephala, . Zingiber officinale seed, . Chrysanthemum and . Yucca were as effective as 10. ppm malachite green in slowing growth. A subsequent trial, where doses of the plant extract were given at 72 and 120. h post-inoculation, found that . Rumex obtusifolius, . Sophora flavescens, . Echinacea and . Z. . officinale were the most effective compounds impacting growth. The study demonstrates that certain plant extracts impact on the growth dynamics of . S. . australis but further research is required to assess their performance in vivo.",
keywords = "Antifungal activity, Fish pathogen, Fungal infection, Salmonids, Water mould",
author = "S. Caruana and Yoon, {G. H.} and Freeman, {M. A.} and Mackie, {J. A.} and Shinn, {A. P.}",
year = "2012",
month = "8",
day = "15",
doi = "10.1016/j.aquaculture.2012.06.035",
language = "English",
volume = "358-359",
pages = "146--154",
journal = "Aquaculture",
issn = "0044-8486",
publisher = "Elsevier",

}

TY - JOUR

T1 - The efficacy of selected plant extracts and bioflavonoids in controlling infections of Saprolegnia australis (Saprolegniales; Oomycetes)

AU - Caruana, S.

AU - Yoon, G. H.

AU - Freeman, M. A.

AU - Mackie, J. A.

AU - Shinn, A. P.

PY - 2012/8/15

Y1 - 2012/8/15

N2 - Saprolegnia infections can account for the significant loss of salmonid eggs and adults in breeding condition and although there are a number of chemical agents available to control infections in hatcheries, treatment is difficult and there are reservations regarding their efficacy, prompting a search for suitable replacements. Here, the efficacy of 24 crude plant extracts and 3 bioflavonoids on the growth of . Saprolegnia australis were assessed using an in vitro agar diffusion method against a set of synthetic chemotherapeutants commonly used within the aquaculture industry. The 12 best extracts inhibiting growth at ≤. 100. ppm, were then added to cultures of . S. . australis in a GP broth and the daily growth was monitored spectrophotometrically over a 7-day period. All 12 plant extracts reduced growth, however, only . Atractylodes macrocephala, . Zingiber officinale seed, . Chrysanthemum and . Yucca were as effective as 10. ppm malachite green in slowing growth. A subsequent trial, where doses of the plant extract were given at 72 and 120. h post-inoculation, found that . Rumex obtusifolius, . Sophora flavescens, . Echinacea and . Z. . officinale were the most effective compounds impacting growth. The study demonstrates that certain plant extracts impact on the growth dynamics of . S. . australis but further research is required to assess their performance in vivo.

AB - Saprolegnia infections can account for the significant loss of salmonid eggs and adults in breeding condition and although there are a number of chemical agents available to control infections in hatcheries, treatment is difficult and there are reservations regarding their efficacy, prompting a search for suitable replacements. Here, the efficacy of 24 crude plant extracts and 3 bioflavonoids on the growth of . Saprolegnia australis were assessed using an in vitro agar diffusion method against a set of synthetic chemotherapeutants commonly used within the aquaculture industry. The 12 best extracts inhibiting growth at ≤. 100. ppm, were then added to cultures of . S. . australis in a GP broth and the daily growth was monitored spectrophotometrically over a 7-day period. All 12 plant extracts reduced growth, however, only . Atractylodes macrocephala, . Zingiber officinale seed, . Chrysanthemum and . Yucca were as effective as 10. ppm malachite green in slowing growth. A subsequent trial, where doses of the plant extract were given at 72 and 120. h post-inoculation, found that . Rumex obtusifolius, . Sophora flavescens, . Echinacea and . Z. . officinale were the most effective compounds impacting growth. The study demonstrates that certain plant extracts impact on the growth dynamics of . S. . australis but further research is required to assess their performance in vivo.

KW - Antifungal activity

KW - Fish pathogen

KW - Fungal infection

KW - Salmonids

KW - Water mould

UR - http://www.scopus.com/inward/record.url?scp=84864046665&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84864046665&partnerID=8YFLogxK

U2 - 10.1016/j.aquaculture.2012.06.035

DO - 10.1016/j.aquaculture.2012.06.035

M3 - Article

AN - SCOPUS:84864046665

VL - 358-359

SP - 146

EP - 154

JO - Aquaculture

JF - Aquaculture

SN - 0044-8486

ER -