Evaluation of chemical disinfestants in reducing Verticillium dahliae conidia in irrigation water

Santos-Rufo, Antonio; Rodrı́guez-Jurado, Dolores

doi:10.1016/j.cropro.2015.10.016

Cited by 12 publications

(14 citation statements)

References 26 publications

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“…There are two, related, ways in which irrigation can affect VWO in Andalusia: (i) by directly incorporating inoculum into the soil through V. dahliae ‐infested water; this issue has been addressed in other work (Santos‐Rufo & Rodríguez‐Jurado, ); and (ii) by the effect of irrigation water, if it is not contaminated by V. dahliae , on levels of inoculum in the soil. This study has focused on the second effect of irrigation and the progress of VWO.…”

Section: Discussionmentioning

confidence: 99%

Assessment of the effect of surface drip irrigation on Verticillium dahliae propagules differing in persistence in soil and on verticillium wilt of olive

et al. 2017

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For efficient integrated management of verticillium wilt in olive (VWO), it is important to establish whether irrigation treatments (with Verticillium dahliae‐free water) that mitigate the disease in V. dahliae‐infested soil, also reduce the levels of more and less persistent propagules of the pathogen in the soil. Effects of irrigation on VWO and V. dahliae propagules were evaluated under natural environmental conditions. Potted plants were irrigated (pathogen‐free water) to two ranges of soil water content (RWC; high and low) at three surface drip‐irrigation frequencies (daily, weekly, and daily during some periods and otherwise weekly). VWO and total inoculum density (ID), density of less persistent micropropagules (MpD) and more persistent sclerotia in wet soil (SwD), and sclerotia density for air‐dried soil (SdD) were monitored. A logistic model (multiple sigmoid) of disease incidence revealed the lowest parameter values in treatments irrigated daily. Daily frequency of irrigation showed significantly lower disease incidence (39.2%) and disease intensity index (43.9%) and MpD (88.0%) values as areas compared with other frequencies, regardless of the RWC. High RWC significantly reduced (70.8–84.9%) ID, SwD and SdD as areas, but significantly increased (18.0%) the incidence of infected plants (IIP), regardless of the irrigation frequency. The disease incidence was not correlated with temperature. Daily irrigation to low RWC mitigated the VWO and the IIP, kept soil to the lowest MpD and resulted in the lowest SdD level at the end of the trial. Results suggested that less persistent propagules could have played a part in the disease development.

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Section: Discussionmentioning

confidence: 99%

Assessment of the effect of surface drip irrigation on Verticillium dahliae propagules differing in persistence in soil and on verticillium wilt of olive

et al. 2017

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“…Controlling the fungus in irrigation water has become necessary ever since, and some studies have already been carried out in this respect. Direct application of OV and OA into water partially reduced infestations by sclerotia in vitro and by conidia in ponded water under spring conditions (Santos‐Rufo & Rodríguez‐Jurado, ; Gómez‐Gálvez et al ., ). The efficacy of those disinfectants at different concentrations (OV at 3.2, 12.8 and 51.2 mL L −1 , and OA at 1.25, 3.76 and 11.27 mL L −1 ) was evaluated here to improve their implementation within the current framework of the olive orchard drip‐irrigation systems in Andalusia.…”

Section: Discussionmentioning

confidence: 99%

“…OX‐VIRIN and OX‐AGUA AL25 (hereinafter abbreviated to OV and OA, respectively) were used as they were the products showing the highest efficacy in reducing water infestations by V. dahliae in previous studies (Santos‐Rufo & Rodríguez‐Jurado, ; Gómez‐Gálvez et al ., ). OV, a disinfectant based on H 2 O 2 (25%) in combination with peracetic acid (8%) and acetic acid (5%), was evaluated at 3.2, 12.8 and 51.2 mL L −1 .…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, treating V. dahliae ‐infested water with some disinfectants, namely OX‐VIRIN and OX‐AGUA AL25, reported potential efficacy in reducing the propagules of the fungus, which was enhanced by increasing both the exposure time and the concentration of the product. Conidia and sclerotia of various V. dahliae isolates differing in virulence were effectively reduced when OX‐VIRIN or OX‐AGUA AL25 were applied to water at some concentrations under laboratory conditions (Santos‐Rufo & Rodríguez‐Jurado, ; Gómez‐Gálvez et al ., ).…”

Section: Introductionmentioning

confidence: 99%

“…Disinfectants could be applied to ponded water or injected into the irrigation system to control V. dahliae in water within the framework of the irrigation technique used in Andalusia. A significant reduction of V. dahliae conidia was reported when OX‐VIRIN and OX‐AGUA AL25 were applied directly into ponded infested water under spring conditions in Andalusia (Santos‐Rufo & Rodríguez‐Jurado, ). Furthermore, the application of these disinfectants through watering reduced the fungus in soil and did not cause phytotoxicity on potted Picual and Arbequina olive plants under growth chamber conditions (Gómez‐Gálvez & Rodríguez‐Jurado, ).…”

Section: Introductionmentioning

confidence: 99%

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Reduced introduction of Verticillium dahliae through irrigation systems and accumulation in soil by injection of peroxygen‐based disinfectants

et al. 2018

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Controlling Verticillium dahliae through irrigation systems should be an important measure within integrated management of verticillium wilt of olive in Spain. Pathogen content of water infested by V. dahliae conidia and sclerotia can be diminished following in vitro treatments with the disinfectants OX‐VIRIN and OX‐AGUA AL25. Three concentrations per disinfectant were assessed for their effectiveness under operational conditions of modern irrigated olive orchards. Sterilized potted soil was drip‐irrigated with conidia‐ or sclerotia‐containing water that was pumped from a storage tank and disinfected (or not, control) within the pipelines via metering pumps. The trial was carried out in autumn and spring for each type of propagule infesting the water. The inoculum dispensed through drippers and the total inoculum density accumulated in soil were estimated. Furthermore, the treated residual inoculum in soil was assessed for pathogenicity on olive plants. Conidial incorporation in soil was prevented by most disinfectant treatments in spring; while for sclerotia, prevention was observed only at the highest OX‐VIRIN (51.2 mL L−1; in both seasons) and OX‐AGUA AL25 (11.27 mL L−1; in autumn) concentration. The remaining disinfectant treatments reduced conidia and sclerotia accumulation in soil by over 99% and 95%, respectively. Season particularly impacted the efficacy of lower concentrations. Expression of symptoms was not observed in olive plants grown in previously treated soils. The infectivity of the residual inoculum present in some treated soils was prevented, markedly reduced or limited to the roots. These results provide a novel, interesting and feasible approach in the management of the disease.

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Potential efficacy of soil-applied disinfectant treatments against Verticillium wilt of olive

Gómez-Gálvez

Rodrı́guez-Jurado

2018

Crop Protection

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Evaluation of chemical disinfestants in reducing Verticillium dahliae conidia in irrigation water

Cited by 12 publications

References 26 publications

Assessment of the effect of surface drip irrigation on Verticillium dahliae propagules differing in persistence in soil and on verticillium wilt of olive

Assessment of the effect of surface drip irrigation on Verticillium dahliae propagules differing in persistence in soil and on verticillium wilt of olive

Reduced introduction of Verticillium dahliae through irrigation systems and accumulation in soil by injection of peroxygen‐based disinfectants

Potential efficacy of soil-applied disinfectant treatments against Verticillium wilt of olive

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