Use of Cross-Flow Membrane Filtration in a Recirculating Hydroponic System to Suppress Root Disease in Pepper Caused by Pythium myriotylum
Zoosporic pathogens in the genera Pythium and Phytophthora cause extensive root disease epiphytotics in recirculating hydroponic vegetable-production greenhouses. Zoospore cysts of Pythium myriotylum Drechsler were used to evaluate the effectiveness of cross-flow membrane filters to control pythiace...
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| Veröffentlicht in: | Phytopathology 2009-05, Vol.99 (5), p.597-607 |
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| description | Zoosporic pathogens in the genera Pythium and Phytophthora cause extensive root disease epiphytotics in recirculating hydroponic vegetable-production greenhouses. Zoospore cysts of Pythium myriotylum Drechsler were used to evaluate the effectiveness of cross-flow membrane filters to control pythiaceous pathogens in recirculating hydroponic systems. Four membrane filter brands (Honeycomb, Polypure, Polymate, and Absolife) were tested alone or in combination to determine which filters would effectively remove infective propagules of P. myriotylum from solutions and reduce disease incidence and severity. Zoospore cysts of P. myriotylum generally measured 8 to 10 μm, and it was hypothesized that filters with pore-sizes |
| doi_str_mv | 10.1094/phyto-99-5-0597 |
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Zoospore cysts of Pythium myriotylum Drechsler were used to evaluate the effectiveness of cross-flow membrane filters to control pythiaceous pathogens in recirculating hydroponic systems. Four membrane filter brands (Honeycomb, Polypure, Polymate, and Absolife) were tested alone or in combination to determine which filters would effectively remove infective propagules of P. myriotylum from solutions and reduce disease incidence and severity. Zoospore cysts of P. myriotylum generally measured 8 to 10 μm, and it was hypothesized that filters with pore-sizes <5 μm would be effective at removing 100% of the infective propagules and protect pepper plants from root infection. Single-filter assays with Honeycomb and Polypure brands removed 85 to 95% of zoospore cysts when pore sizes were rated at 1, 5, 10, 20, or 30 μm. Single-filter assays of Polymate and Absolife brands were more effective, exhibiting apparently 100% removal of zoospore cysts from nutrient solutions on filters rated at 1 to 10 μm. However, plant bioassays with Honeycomb and Polymate single filters failed to give long-term protection of pepper plants. Double-filter assays with 1- and 0.5-μm Polymate filters significantly increased the protection of pepper plants grown in nutrient film technique systems but, eventually, root disease and plant wilt could be observed. Insect transmissions by shore flies were not factors in disease development. Scanning electron microscopy images of zoospore cysts entrapped on Polymate filters revealed zoospore cysts that were either fully encysted, partially encysted, or of unusually small size (3 μm in diameter). It was concluded that either the atypically small or pliable pleomorphic zoospore cysts were able to penetrate filter membranes that theoretically should have captured them.</description><identifier>ISSN: 0031-949X</identifier><identifier>EISSN: 1943-7684</identifier><identifier>DOI: 10.1094/phyto-99-5-0597</identifier><identifier>PMID: 19351256</identifier><identifier>CODEN: PHYTAJ</identifier><language>eng</language><publisher>St. Paul, MN: American Phytopathological Society</publisher><subject>artificial membranes ; Bacteria ; Biological and medical sciences ; Biological Assay ; Capsicum - microbiology ; Capsicum - ultrastructure ; Capsicum annuum ; disease control ; filter membranes ; filters ; filtration ; Filtration - methods ; Fundamental and applied biological sciences. Psychology ; hydroponics ; Hydroponics - methods ; nutrient solutions ; Oomycetes ; Phytopathology. Animal pests. Plant and forest protection ; Phytophthora ; Plant Diseases - microbiology ; plant diseases and disorders ; Plant Roots - microbiology ; pore sizes ; Protons ; Pythium ; Pythium - physiology ; Pythium - ultrastructure ; Pythium myriotylum ; recirculating aquaculture systems ; root diseases ; testing ; zoospores</subject><ispartof>Phytopathology, 2009-05, Vol.99 (5), p.597-607</ispartof><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c487t-175ddb1c3afbd598f0805391b3a0b5aa43214621483bd215679e38ab240e1373</citedby><cites>FETCH-LOGICAL-c487t-175ddb1c3afbd598f0805391b3a0b5aa43214621483bd215679e38ab240e1373</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,3711,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21385062$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19351256$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Schuerger, Andrew C</creatorcontrib><creatorcontrib>Hammer, William</creatorcontrib><title>Use of Cross-Flow Membrane Filtration in a Recirculating Hydroponic System to Suppress Root Disease in Pepper Caused by Pythium myriotylum</title><title>Phytopathology</title><addtitle>Phytopathology</addtitle><description>Zoosporic pathogens in the genera Pythium and Phytophthora cause extensive root disease epiphytotics in recirculating hydroponic vegetable-production greenhouses. Zoospore cysts of Pythium myriotylum Drechsler were used to evaluate the effectiveness of cross-flow membrane filters to control pythiaceous pathogens in recirculating hydroponic systems. Four membrane filter brands (Honeycomb, Polypure, Polymate, and Absolife) were tested alone or in combination to determine which filters would effectively remove infective propagules of P. myriotylum from solutions and reduce disease incidence and severity. Zoospore cysts of P. myriotylum generally measured 8 to 10 μm, and it was hypothesized that filters with pore-sizes <5 μm would be effective at removing 100% of the infective propagules and protect pepper plants from root infection. Single-filter assays with Honeycomb and Polypure brands removed 85 to 95% of zoospore cysts when pore sizes were rated at 1, 5, 10, 20, or 30 μm. Single-filter assays of Polymate and Absolife brands were more effective, exhibiting apparently 100% removal of zoospore cysts from nutrient solutions on filters rated at 1 to 10 μm. However, plant bioassays with Honeycomb and Polymate single filters failed to give long-term protection of pepper plants. Double-filter assays with 1- and 0.5-μm Polymate filters significantly increased the protection of pepper plants grown in nutrient film technique systems but, eventually, root disease and plant wilt could be observed. Insect transmissions by shore flies were not factors in disease development. Scanning electron microscopy images of zoospore cysts entrapped on Polymate filters revealed zoospore cysts that were either fully encysted, partially encysted, or of unusually small size (3 μm in diameter). It was concluded that either the atypically small or pliable pleomorphic zoospore cysts were able to penetrate filter membranes that theoretically should have captured them.</description><subject>artificial membranes</subject><subject>Bacteria</subject><subject>Biological and medical sciences</subject><subject>Biological Assay</subject><subject>Capsicum - microbiology</subject><subject>Capsicum - ultrastructure</subject><subject>Capsicum annuum</subject><subject>disease control</subject><subject>filter membranes</subject><subject>filters</subject><subject>filtration</subject><subject>Filtration - methods</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>hydroponics</subject><subject>Hydroponics - methods</subject><subject>nutrient solutions</subject><subject>Oomycetes</subject><subject>Phytopathology. Animal pests. Plant and forest protection</subject><subject>Phytophthora</subject><subject>Plant Diseases - microbiology</subject><subject>plant diseases and disorders</subject><subject>Plant Roots - microbiology</subject><subject>pore sizes</subject><subject>Protons</subject><subject>Pythium</subject><subject>Pythium - physiology</subject><subject>Pythium - ultrastructure</subject><subject>Pythium myriotylum</subject><subject>recirculating aquaculture systems</subject><subject>root diseases</subject><subject>testing</subject><subject>zoospores</subject><issn>0031-949X</issn><issn>1943-7684</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqF0kGL1DAYBuAgijuunr1pLnqr-31N0zZHGR1HWNlhZxb0FNI03Y20TTdJkf4Ff7UZZtCjhxAIz_dC8oaQ1wgfEERxNT0s0WVCZDwDLqonZIWiYFlV1sVTsgJgmIlCfL8gL0L4CQBVzcvn5AIF45jzckV-3wVDXUfX3oWQbXr3i34zQ-PVaOjG9tGraN1I7UgVvTXaej336Wi8p9ul9W5yo9V0v4RoBhod3c_T5E0I9Na5SD_ZYFTKT9M7M03G07Wag2lps9DdEh_sPNBh8dbFpZ-Hl-RZp_pgXp33S3LYfD6st9n1zZev64_XmS7qKmZY8bZtUDPVNS0XdQc1cCawYQoarlTBcizKtGrWtDnyshKG1arJCzDIKnZJ3p9iJ-8eZxOiHGzQpu_Tld0cZFkhJgf_hTmkbIQywasT1MdH9KaTk7eD8otEkMea5G7743AjhZBcHmtKE2_O0XMzmPafP_eSwLszUEGrvkt9aBv-uhxZzaHMk3t7cp1yUt37ZO72OSADLPMC0wf4A5rdpdg</recordid><startdate>20090501</startdate><enddate>20090501</enddate><creator>Schuerger, Andrew C</creator><creator>Hammer, William</creator><general>American Phytopathological Society</general><scope>FBQ</scope><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7T7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>M7N</scope><scope>P64</scope><scope>7X8</scope></search><sort><creationdate>20090501</creationdate><title>Use of Cross-Flow Membrane Filtration in a Recirculating Hydroponic System to Suppress Root Disease in Pepper Caused by Pythium myriotylum</title><author>Schuerger, Andrew C ; Hammer, William</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c487t-175ddb1c3afbd598f0805391b3a0b5aa43214621483bd215679e38ab240e1373</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>artificial membranes</topic><topic>Bacteria</topic><topic>Biological and medical sciences</topic><topic>Biological Assay</topic><topic>Capsicum - microbiology</topic><topic>Capsicum - ultrastructure</topic><topic>Capsicum annuum</topic><topic>disease control</topic><topic>filter membranes</topic><topic>filters</topic><topic>filtration</topic><topic>Filtration - methods</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>hydroponics</topic><topic>Hydroponics - methods</topic><topic>nutrient solutions</topic><topic>Oomycetes</topic><topic>Phytopathology. Animal pests. Plant and forest protection</topic><topic>Phytophthora</topic><topic>Plant Diseases - microbiology</topic><topic>plant diseases and disorders</topic><topic>Plant Roots - microbiology</topic><topic>pore sizes</topic><topic>Protons</topic><topic>Pythium</topic><topic>Pythium - physiology</topic><topic>Pythium - ultrastructure</topic><topic>Pythium myriotylum</topic><topic>recirculating aquaculture systems</topic><topic>root diseases</topic><topic>testing</topic><topic>zoospores</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Schuerger, Andrew C</creatorcontrib><creatorcontrib>Hammer, William</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Phytopathology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Schuerger, Andrew C</au><au>Hammer, William</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Use of Cross-Flow Membrane Filtration in a Recirculating Hydroponic System to Suppress Root Disease in Pepper Caused by Pythium myriotylum</atitle><jtitle>Phytopathology</jtitle><addtitle>Phytopathology</addtitle><date>2009-05-01</date><risdate>2009</risdate><volume>99</volume><issue>5</issue><spage>597</spage><epage>607</epage><pages>597-607</pages><issn>0031-949X</issn><eissn>1943-7684</eissn><coden>PHYTAJ</coden><abstract>Zoosporic pathogens in the genera Pythium and Phytophthora cause extensive root disease epiphytotics in recirculating hydroponic vegetable-production greenhouses. Zoospore cysts of Pythium myriotylum Drechsler were used to evaluate the effectiveness of cross-flow membrane filters to control pythiaceous pathogens in recirculating hydroponic systems. Four membrane filter brands (Honeycomb, Polypure, Polymate, and Absolife) were tested alone or in combination to determine which filters would effectively remove infective propagules of P. myriotylum from solutions and reduce disease incidence and severity. Zoospore cysts of P. myriotylum generally measured 8 to 10 μm, and it was hypothesized that filters with pore-sizes <5 μm would be effective at removing 100% of the infective propagules and protect pepper plants from root infection. Single-filter assays with Honeycomb and Polypure brands removed 85 to 95% of zoospore cysts when pore sizes were rated at 1, 5, 10, 20, or 30 μm. Single-filter assays of Polymate and Absolife brands were more effective, exhibiting apparently 100% removal of zoospore cysts from nutrient solutions on filters rated at 1 to 10 μm. However, plant bioassays with Honeycomb and Polymate single filters failed to give long-term protection of pepper plants. Double-filter assays with 1- and 0.5-μm Polymate filters significantly increased the protection of pepper plants grown in nutrient film technique systems but, eventually, root disease and plant wilt could be observed. Insect transmissions by shore flies were not factors in disease development. Scanning electron microscopy images of zoospore cysts entrapped on Polymate filters revealed zoospore cysts that were either fully encysted, partially encysted, or of unusually small size (3 μm in diameter). It was concluded that either the atypically small or pliable pleomorphic zoospore cysts were able to penetrate filter membranes that theoretically should have captured them.</abstract><cop>St. Paul, MN</cop><pub>American Phytopathological Society</pub><pmid>19351256</pmid><doi>10.1094/phyto-99-5-0597</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Phytopathology, 2009-05, Vol.99 (5), p.597-607 |
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| source | MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection; American Phytopathological Society Journal Back Issues |
| subjects | artificial membranes Bacteria Biological and medical sciences Biological Assay Capsicum - microbiology Capsicum - ultrastructure Capsicum annuum disease control filter membranes filters filtration Filtration - methods Fundamental and applied biological sciences. Psychology hydroponics Hydroponics - methods nutrient solutions Oomycetes Phytopathology. Animal pests. Plant and forest protection Phytophthora Plant Diseases - microbiology plant diseases and disorders Plant Roots - microbiology pore sizes Protons Pythium Pythium - physiology Pythium - ultrastructure Pythium myriotylum recirculating aquaculture systems root diseases testing zoospores |
| title | Use of Cross-Flow Membrane Filtration in a Recirculating Hydroponic System to Suppress Root Disease in Pepper Caused by Pythium myriotylum |
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