Effects of Spraying Ozonated Water on the Severity of Powdery Mildew Infection on Cucumber Leaves

Fujiwara, Kazuhiro; Fujii, T.

doi:10.1080/01919510208901635

Cited by 28 publications

(23 citation statements)

References 17 publications

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“…However, there was no washing-away effect between the non-treated control and DW conditions as the severity under the DW condition was higher than that of the nontreated control at 21 April. Foliar spraying of OW with a DOC of 4 mg L À1 was capable of suppressing the development of PMI in cucumber for 14 d when the initial severity level was around 25 (Fujiwara and Fujii, 2002). Even though the initial severity of PMI was different from the present experiment, the effect of spraying OW with DOC of 4 and 8 mg L À1 on controlling PMI may be similar.…”

Section: Severity Of Powdery Mildew Infection (Pmi)contrasting

confidence: 50%

“…Although there was not much difference in the severity of PMI between the non-treated control, DW, and OW conditions prior to the third spraying, the severity in the OW condition decreased significantly relative to the controls after the third spraying. Fujiwara and Fujii (2002) and Park et al (2008) reported a washing-away effect which is that small amounts of mycelia and conidia on the leaf can be washed away by collisions of sprayed water particles and the stream of sprayed water on the leaf surface. However, there was no washing-away effect between the non-treated control and DW conditions as the severity under the DW condition was higher than that of the nontreated control at 21 April.…”

Section: Severity Of Powdery Mildew Infection (Pmi)mentioning

confidence: 99%

“…Ozonated water (OW) (Fujiwara and Fujii, 2002;Park et al, 2008) and acidic electrolyzed oxidizing water (AEOW) (Buck et al, 2002b;Fujiwara et al, 1998Fujiwara et al, , 2000Guentzel et al, 2008;Mueller et al, 2003) have been discussed as alternative candidates to agricultural chemical fungicides or as components of new sanitation methods for eliminating pathogenic organisms on crop and food surfaces. The use of OW has been rapidly expanding in the food industry, especially for disinfecting food surfaces, food-processing equipment, apparatuses and instruments, and is addressed in many studies including those by Flippi (2000), Klingman and Christy (2000), and Restaino et al (1995).…”

Section: Introductionmentioning

confidence: 99%

“…However, little information is available on the use of OW as an alternative to agricultural chemical fungicides or for combating airborne plant diseases during crop cultivation. A notable exception is the report by Fujiwara and Fujii (2002), which investigated the efficacy of controlling powdery mildew by spraying 4 mg L À1 OW directly on cucumber leaves. AEOW, which is occasionally called electrolyzed anodic solution or electrolyzed anode-side water, shows promise as an environmentally friendly broad-spectrum microbial decontamination agent (Guentzel et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Foliar Spray Efficacy of Electrolytically Ozonated Water and Acidic Electrolyzed Oxidizing Water for Controlling Powdery Mildew Infection on Cucumber Leaves

Fujiwara

Fujii

Park

2009

Ozone: Science & Engineering

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We investigated and compared the effects of foliar sprays of electrolytically ozonated water (OW) and acidic electrolyzed oxidizing water (AEOW) on severity of powdery mildew infection (PMI) and occurrence of visible physiological disorder on cucumber leaves. Foliar spray of OW contained severity of PMI to almost the same level as the initial value, without any visible physiological disorder. Although severity of PMI on AEOW-sprayed leaves was significantly lower than on OW-sprayed leaves, the leaves showed a visible physiological disorder after the first spray. These results indicate that OW is a viable option for controlling PMI on cucumber leaves at low initial severity levels, or for prevention of PMI, and that AEOW can be used for controlling PMI with special efforts taken against a visible physiological disorder.

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Section: Severity Of Powdery Mildew Infection (Pmi)contrasting

confidence: 50%

Section: Severity Of Powdery Mildew Infection (Pmi)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of Foliar Spray Efficacy of Electrolytically Ozonated Water and Acidic Electrolyzed Oxidizing Water for Controlling Powdery Mildew Infection on Cucumber Leaves

Fujiwara

Fujii

Park

2009

Ozone: Science & Engineering

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show abstract

“…The reduction in agricultural chemical usage has become an important issue for various reasons; therefore, we require practical and effective treatments using substances that reduce agricultural chemical usage and are less harmful to humans and the environment and also less persistent (Fujiwara and Fujii, 2002). Ozonated water (OW) can be used as an alternative to agricultural chemicals for controlling powdery mildew on cucumber (Fujiwara and Fujii, 2002;Fujiwara et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Spraying Ozonated Water under Well-Ventilated Conditions Does Not Cause Any Visible Injury to Fruit-Vegetable Seedlings

Fujiwara

Hayashi

Park

2011

Ozone: Science & Engineering

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To determine whether horticultural plants are visibly injured by being sprayed with ozonated water (OW) for airborne-disease control, we sprayed OW with a dissolved ozone concentration (DOC) of 4.0 or 8.0 mg L −1 or distilled water (DW) on melon (Cucumis melo L. 'Andes'), tomato (Lycopersicon esculentum M. 'Momotaro-York'), watermelon (Citrullus lanatus M. 'Fujikou'), cucumber (Cucumis sativus L. 'Sharp'), green pepper (Capsicum annuum L. 'Kyounami'), and eggplant (Solanum melongena L. 'Senryo-nigou') seedlings underwell-ventilated conditions. The OW and DW were sprayed on the seedlings at 10 a.m. and 2 p.m. on 3 successive days. No yellowing, chlorosis, necrosis, or malformation was observed for any of the seedlings during this period and also 1 day after the last OW spraying. These results indicate that intensive spraying of OW with a high DOC, for airborne-disease control, does not cause any visible injury to the fruit-vegetable seedlings used as long as the spraying is carried out under well-ventilated conditions.

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Ozone treatments activate defence responses against Meloidogyne incognita and Tomato spotted wilt virus in tomato

Prigigallo

Melillo

Bubici

et al. 2019

Pest Management Science

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BACKGROUND: Ozonated water (O 3 wat) soil drench and/or foliar spray applications were evaluated for their potential to control the root-knot nematode Meloidogyne incognita (RKN) and the airborne pathogen Tomato spotted wilt virus (TSWV) in tomato. We investigated how O 3 wat modulates the salicylic acid/jasmonic acid/ethylene (SA/JA/ET) signalling network in the host, locally and systemically, to induce resistance to nematode and virus. RESULTS: The application as soil drench was effective in reducing the number of galls and egg masses, but did not reduce the incidence and severity of TSWV infection. Conversely, O 3 wat applied by foliar spray decreased TSWV disease incidence and severity (−20%), but was not able to control M. incognita infection. SA-related genes were generally upregulated in both locally treated and systemically reached tissues, showing a positive action of the O 3 wat treatment on SA signalling. Neither O 3 wat application method significantly altered JA-related gene expression in either direction. ET-related genes were differentially regulated by root or leaf treatments, indicating that O 3 wat may have different effects on ET-mediated signalling in different organs. JA/ET/SA related pathways were differentially modulated by O 3 wat in the presence of either RKN or TSWV. CONCLUSION: O 3 wat had a higher efficacy when applied directly to organs challenged by the pathogens, although it was potentially able to stimulate defence responses through the activation of SA signalling. Owing to its safety and effectiveness in controlling nematode and virus infections, O 3 wat can be considered as a possible alternative tool for sustainable disease management practices.

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Effects of Spraying Ozonated Water on the Severity of Powdery Mildew Infection on Cucumber Leaves

Cited by 28 publications

References 17 publications

Comparison of Foliar Spray Efficacy of Electrolytically Ozonated Water and Acidic Electrolyzed Oxidizing Water for Controlling Powdery Mildew Infection on Cucumber Leaves

Comparison of Foliar Spray Efficacy of Electrolytically Ozonated Water and Acidic Electrolyzed Oxidizing Water for Controlling Powdery Mildew Infection on Cucumber Leaves

Spraying Ozonated Water under Well-Ventilated Conditions Does Not Cause Any Visible Injury to Fruit-Vegetable Seedlings

Ozone treatments activate defence responses against Meloidogyne incognita and Tomato spotted wilt virus in tomato

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