A Review of Possibilities for Disinfection of Recirculation Water From Soilless Cultures

Runia, W.T.

doi:10.17660/actahortic.1995.382.25

Cited by 105 publications

(71 citation statements)

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“…Closed soilless hydroponic systems are also an ideal experimental setup for testing methods for eliminating plant-parasitic nematodes from irrigation water (Moens & Hendrickx, 1989, 1990Moens et al, 1991;Runia, 1995;Runia & Amsing, 1996;D'Errico & Ingenito, 2003). As large volumes of crops are grown in closed hydroponic systems in the Netherlands, research over the past 15 years has focused on the elimination of plant-parasitic nematodes from the nutrient drainage water in such systems.…”

Section: Discussionmentioning

confidence: 99%

“…Effective chlorination depends on the exposure time of the organism to free chlorine as well as the quality, chlorine content and pH of the water. However, high chlorine levels may be phytotoxic to certain crops or can restrict root development (Runia, 1995).…”

Section: Chlorinationmentioning

confidence: 99%

“…However, membranes used in reverse osmosis and ultra-filtration are not recommended for disinfestations of irrigation water, as such use might lead to clogging due to the very small pore size of the filters that needs to be used to eliminate the nematodes (Runia, 1995). Grech et al (1989) designed a system to eliminate pathogens from citrus nursery irrigation water.…”

Section: Filtrationmentioning

confidence: 99%

“…The pH of the water to be treated must be acidic (pH 4) to provide ozone stability. The efficacy of ozone also depends on the oxygen demand of the drainage water and the nature of the oxidation compounds (Runia, 1995;Runia & Amsing, 1996).…”

Section: Ozonationmentioning

confidence: 99%

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Occurrence and Control of Plant-parasitic Nematodes in Irrigation Water – A Review

Hugo

Malan

2016

SAJEV

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A literature study was carried out to determine what is currently known about the contamination of irrigation water with plant-parasitic nematodes, and what control measures are currently available. Contamination sources of irrigation water with plant-parasitic nematodes were investigated, including wells, boreholes, collected rainwater, ponds, lakes, dams, rivers, municipal water, runoff water, irrigation canals and drainage water in soilless culture. Only when the origin of irrigation water was a capped borehole was the risk of contamination with plant-parasitic nematodes low. The plantparasitic nematodes of economic importance to grapevine reported to be found in irrigation water were Meloidogyne spp., Xiphinema spp., Tylenchulus semipenetrans, Trichodorus sp., Criconemoides xenoplax and Pratylenchus spp. The different sampling techniques used for the detection and monitoring of plant-parasitic nematodes and the sampling time and location are listed. The survival and infection potential reported for each species of plant-parasitic nematode found in irrigation water was noted. Serious nematode parasites of grapevines, such as Meloidogyne javanica, can survive for 16 to 32 days, M. incognita, for up to 14 days, Pratylenchus, for up to 70 days, T. semipenetrans, for up to 128 days, and X. index, for up to 13 days in irrigation water. All reported techniques used for the management of nematodes in irrigation water are listed and possible future research into the control of plant-parasitic nematodes in irrigation water is discussed. From this review, substantial evidence was obtained of the danger of introducing plant-parasitic nematodes to grapevine production sites by means of irrigation water.

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Section: Discussionmentioning

confidence: 99%

Section: Chlorinationmentioning

confidence: 99%

Section: Filtrationmentioning

confidence: 99%

Section: Ozonationmentioning

confidence: 99%

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Occurrence and Control of Plant-parasitic Nematodes in Irrigation Water – A Review

Hugo

Malan

2016

SAJEV

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“…Ce procédé constitue donc pour les serristes une réponse nouvelle qui vient s'ajouter aux techniques déjà existantes (RUNIA, 1995). Elle présente en plus une efficacité « détoxifiante » permettant de répondre à la problématique liée à la contamination des eaux d'apport par des micropolluants.…”

Section: -Conclusionunclassified

Étude du traitement et du recyclage des eaux issues des serres horticoles

Langlais¹,

Déniel²,

Wolbert³

et al. 2005

rseau

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La gestion de l'eau dans les systèmes de culture hors-sol fait apparaître deux problèmes distincts. D'une part, les ressources en eau doivent être de bonne qualité et ne pas contenir de pesticides ou de germes pathogènes. D'autre part, les rejets fortement " chargés " en nutriments (NO3-, PO43-) polluants pour l'environnement, doivent être limités par le biais de leur recyclage ce qui implique nécessairement la désinfection des effluents. La technique mise en œuvre pour obtenir cette maîtrise de la qualité tant chimique que microbiologique des solutions circulantes en culture hors-sol est celle d'une oxydation à l'ozone seul et couplé au peroxyde d'hydrogène dans des réacteurs constitués de mélangeurs statiques. Les conditions de traitement sont une dose d'oxydant de 10 g O3/m3 d'effluent à traiter, un rapport H2O2/O3 de 0,15 g/g pour un temps de contact dans le réacteur de l'ordre de la seconde. Etudié sur site dans le cadre du traitement de effluents de serre réels, le procédé s'est révélé tout à fait adapté pour abattre les pesticides (# 90 % pour l'atrazine), maîtriser la prolifération des micro-organismes (Flore aérobie mésophile, flore fongique) et en particulier des germes pathogènes (Clavibacter michiganensis, Fusarium, Pythium sp ). Le procédé novateur O3/H2O2 sur mélangeurs statiques constitue donc pour les serristes une réponse nouvelle dont l'un des intérêts est de combiner les effets " détoxiquant " et désinfectant.

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