Effect of intercrops on thrips species composition and population abundance on French beans in Kenya
Identifieur interne : 000F09 ( Istex/Corpus ); précédent : 000F08; suivant : 000F10Effect of intercrops on thrips species composition and population abundance on French beans in Kenya
Auteurs : J. O. Nyasani ; R. Meyhöfer ; S. Subramanian ; H. PoehlingSource :
- Entomologia Experimentalis et Applicata [ 0013-8703 ] ; 2012-03.
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Abstract
The study aimed at determining thrips species composition and thrips population density on French bean planted as a sole crop and as an intercrop with either sunflower, Irish potato, or baby corn, in various combinations. Field experiments were conducted in two seasons to examine: (1) thrips population development and thrips species composition over time, (2) effect of intercrops on thrips population density and natural enemies, and (3) effect of intercrops on French bean yield. The experiments were conducted at the Kenya Agricultural Research Institute, Embu, Kenya in a randomized complete block design with four replicates. The thrips population on French beans increased with time. It showed a peak at the flowering stage then started declining when the crops were nearing senescence. French beans hosted four thrips species, Megalurothrips sjostedti (Trybom), Frankliniella schultzei (Trybom), Frankliniella occidentalis (Pergande), and Hydatothrips aldolfifriderici (Karny) (all Thysanoptera: Thripidae) in order of decreasing abundance. The main thrips species on Irish potato and sunflower was F. schultzei. Baby corn hosted only Frankliniella williamsi (Hood) and Thrips pusillus (Bagnall). A monocrop of French bean hosted more thrips than a French bean intercrop mix. Thrips natural enemies such as Orius spp. and Ceranisus spp. were recorded in all crop plants but in especially high numbers on French bean and baby corn, respectively. Plots with French bean alone had about 1.4 times higher yields compared to intercropped plots of French bean with sunflower and French bean with baby corn. However, the percentage of pods that could get rejected on the market due to thrips damage was highest on plots with French bean alone (68 and 63%) and lowest on plots with French bean and baby corn (35 and 37%) in the first and second seasons, respectively. This study showed that a complex of thrips is found in the field and its composition varies with crop stage and species. Intercropping French bean with other crops compromises on French bean yield but reduces damage to the French bean pods, thereby enhancing marketable yield.
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DOI: 10.1111/j.1570-7458.2011.01217.x
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Field experiments were conducted in two seasons to examine: (1) thrips population development and thrips species composition over time, (2) effect of intercrops on thrips population density and natural enemies, and (3) effect of intercrops on French bean yield. The experiments were conducted at the Kenya Agricultural Research Institute, Embu, Kenya in a randomized complete block design with four replicates. The thrips population on French beans increased with time. It showed a peak at the flowering stage then started declining when the crops were nearing senescence. French beans hosted four thrips species, Megalurothrips sjostedti (Trybom), Frankliniella schultzei (Trybom), Frankliniella occidentalis (Pergande), and Hydatothrips aldolfifriderici (Karny) (all Thysanoptera: Thripidae) in order of decreasing abundance. The main thrips species on Irish potato and sunflower was F. schultzei. Baby corn hosted only Frankliniella williamsi (Hood) and Thrips pusillus (Bagnall). A monocrop of French bean hosted more thrips than a French bean intercrop mix. Thrips natural enemies such as Orius spp. and Ceranisus spp. were recorded in all crop plants but in especially high numbers on French bean and baby corn, respectively. Plots with French bean alone had about 1.4 times higher yields compared to intercropped plots of French bean with sunflower and French bean with baby corn. However, the percentage of pods that could get rejected on the market due to thrips damage was highest on plots with French bean alone (68 and 63%) and lowest on plots with French bean and baby corn (35 and 37%) in the first and second seasons, respectively. This study showed that a complex of thrips is found in the field and its composition varies with crop stage and species. 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Field experiments were conducted in two seasons to examine: (1) thrips population development and thrips species composition over time, (2) effect of intercrops on thrips population density and natural enemies, and (3) effect of intercrops on French bean yield. The experiments were conducted at the Kenya Agricultural Research Institute, Embu, Kenya in a randomized complete block design with four replicates. The thrips population on French beans increased with time. It showed a peak at the flowering stage then started declining when the crops were nearing senescence. French beans hosted four thrips species, Megalurothrips sjostedti (Trybom), Frankliniella schultzei (Trybom), Frankliniella occidentalis (Pergande), and Hydatothrips aldolfifriderici (Karny) (all Thysanoptera: Thripidae) in order of decreasing abundance. The main thrips species on Irish potato and sunflower was F. schultzei. Baby corn hosted only Frankliniella williamsi (Hood) and Thrips pusillus (Bagnall). A monocrop of French bean hosted more thrips than a French bean intercrop mix. Thrips natural enemies such as Orius spp. and Ceranisus spp. were recorded in all crop plants but in especially high numbers on French bean and baby corn, respectively. Plots with French bean alone had about 1.4 times higher yields compared to intercropped plots of French bean with sunflower and French bean with baby corn. However, the percentage of pods that could get rejected on the market due to thrips damage was highest on plots with French bean alone (68 and 63%) and lowest on plots with French bean and baby corn (35 and 37%) in the first and second seasons, respectively. This study showed that a complex of thrips is found in the field and its composition varies with crop stage and species. 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Entomologia Experimentalis et Applicata © 2012 The Netherlands Entomological Society</p></availability><date>2012</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Effect of intercrops on thrips species composition and population abundance on French beans in Kenya</title><author xml:id="author-1"><persName><forename type="first">J. O.</forename><surname>Nyasani</surname></persName><affiliation>Kenya Agricultural Research Institute, PO Box 27‐60100, Embu, Kenya</affiliation><affiliation>Leibniz Universität Hannover, Institute of Plant Diseases and Plant Protection, Herrenhäuser Strasse 2, 30419 Hannover, Germany</affiliation><affiliation>International Centre of Insect Physiology and Ecology, PO Box 30772‐00100, Nairobi, Kenya</affiliation></author><author xml:id="author-2"><persName><forename type="first">R.</forename><surname>Meyhöfer</surname></persName><affiliation>Leibniz Universität Hannover, Institute of Plant Diseases and Plant Protection, Herrenhäuser Strasse 2, 30419 Hannover, Germany</affiliation></author><author xml:id="author-3"><persName><forename type="first">S.</forename><surname>Subramanian</surname></persName><email>ssubramania@icipe.org</email><affiliation>International Centre of Insect Physiology and Ecology, PO Box 30772‐00100, Nairobi, Kenya</affiliation></author><author xml:id="author-4"><persName><forename type="first">H.‐M.</forename><surname>Poehling</surname></persName><affiliation>Leibniz Universität Hannover, Institute of Plant Diseases and Plant Protection, Herrenhäuser Strasse 2, 30419 Hannover, Germany</affiliation></author></analytic><monogr><title level="j">Entomologia Experimentalis et Applicata</title><idno type="pISSN">0013-8703</idno><idno type="eISSN">1570-7458</idno><idno type="DOI">10.1111/(ISSN)1570-7458</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="2012-03"></date><biblScope unit="volume">142</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="236">236</biblScope><biblScope unit="page" to="246">246</biblScope></imprint></monogr><idno type="istex">D4816E82F085938EF40F455E9E3FD379B9453213</idno><idno type="DOI">10.1111/j.1570-7458.2011.01217.x</idno><idno type="ArticleID">EEA1217</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2012</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The study aimed at determining thrips species composition and thrips population density on French bean planted as a sole crop and as an intercrop with either sunflower, Irish potato, or baby corn, in various combinations. Field experiments were conducted in two seasons to examine: (1) thrips population development and thrips species composition over time, (2) effect of intercrops on thrips population density and natural enemies, and (3) effect of intercrops on French bean yield. The experiments were conducted at the Kenya Agricultural Research Institute, Embu, Kenya in a randomized complete block design with four replicates. The thrips population on French beans increased with time. It showed a peak at the flowering stage then started declining when the crops were nearing senescence. French beans hosted four thrips species, Megalurothrips sjostedti (Trybom), Frankliniella schultzei (Trybom), Frankliniella occidentalis (Pergande), and Hydatothrips aldolfifriderici (Karny) (all Thysanoptera: Thripidae) in order of decreasing abundance. The main thrips species on Irish potato and sunflower was F. schultzei. Baby corn hosted only Frankliniella williamsi (Hood) and Thrips pusillus (Bagnall). A monocrop of French bean hosted more thrips than a French bean intercrop mix. Thrips natural enemies such as Orius spp. and Ceranisus spp. were recorded in all crop plants but in especially high numbers on French bean and baby corn, respectively. Plots with French bean alone had about 1.4 times higher yields compared to intercropped plots of French bean with sunflower and French bean with baby corn. However, the percentage of pods that could get rejected on the market due to thrips damage was highest on plots with French bean alone (68 and 63%) and lowest on plots with French bean and baby corn (35 and 37%) in the first and second seasons, respectively. This study showed that a complex of thrips is found in the field and its composition varies with crop stage and species. Intercropping French bean with other crops compromises on French bean yield but reduces damage to the French bean pods, thereby enhancing marketable yield.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>keywords</head><item><term>Frankliniella occidentalis</term></item><item><term>Frankliniella schultzei</term></item><item><term>Hydatothrips aldolfifriderici</term></item><item><term>Megalurothrips sjostedti</term></item><item><term>intercropping</term></item><item><term>Thysanoptera</term></item><item><term>Thripidae</term></item><item><term>Fabaceae</term></item><item><term>Phaseolus vulgaris</term></item><item><term>natural enemies</term></item><item><term>associational resistance</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2012-03">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/D4816E82F085938EF40F455E9E3FD379B9453213/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Blackwell Publishing Ltd</publisherName><publisherLoc>Oxford, UK</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1570-7458</doi><issn type="print">0013-8703</issn><issn type="electronic">1570-7458</issn><idGroup><id type="product" value="EEA"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA">Entomologia Experimentalis et Applicata</title></titleGroup></publicationMeta><publicationMeta level="part" position="03103"><doi origin="wiley">10.1111/eea.2012.142.issue-3</doi><numberingGroup><numbering type="journalVolume" number="142">142</numbering><numbering type="journalIssue" number="3">3</numbering></numberingGroup><coverDate startDate="2012-03">March 2012</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="7" status="forIssue"><doi origin="wiley">10.1111/j.1570-7458.2011.01217.x</doi><idGroup><id type="unit" value="EEA1217"></id></idGroup><countGroup><count type="pageTotal" number="11"></count></countGroup><titleGroup><title type="tocHeading1">Original Articles</title></titleGroup><copyright>© 2012 The Authors. Entomologia Experimentalis et Applicata © 2012 The Netherlands Entomological Society</copyright><eventGroup><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:3.0.1 mode:FullText" date="2012-01-24"></event><event type="firstOnline" date="2012-01-24"></event><event type="publishedOnlineFinalForm" date="2012-01-24"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-20"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.3.4 mode:FullText" date="2015-02-25"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="236">236</numbering><numbering type="pageLast" number="246">246</numbering></numberingGroup><correspondenceTo> S. Subramanian, International Centre of Insect Physiology and Ecology, PO Box 30772‐00100, Nairobi, Kenya. E‐mail: <email>ssubramania@icipe.org</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:EEA.EEA1217.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Accepted: 12 December 2011</unparsedEditorialHistory><countGroup><count type="figureTotal" number="5"></count><count type="tableTotal" number="3"></count></countGroup><titleGroup><title type="main">Effect of intercrops on thrips species composition and population abundance on French beans in Kenya</title><title type="shortAuthors"><i>Nyasani</i> et al.</title><title type="short"><i>Effect of intercrops on thrips</i></title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1 #a2 #a3"><personName><givenNames>J. O.</givenNames><familyName>Nyasani</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a2"><personName><givenNames>R.</givenNames><familyName>Meyhöfer</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a3" corresponding="yes"><personName><givenNames>S.</givenNames><familyName>Subramanian</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a2"><personName><givenNames>H.‐M.</givenNames><familyName>Poehling</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="KE"><unparsedAffiliation>Kenya Agricultural Research Institute, PO Box 27‐60100, Embu, Kenya</unparsedAffiliation></affiliation><affiliation xml:id="a2" countryCode="DE"><unparsedAffiliation>Leibniz Universität Hannover, Institute of Plant Diseases and Plant Protection, Herrenhäuser Strasse 2, 30419 Hannover, Germany</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="KE"><unparsedAffiliation>International Centre of Insect Physiology and Ecology, PO Box 30772‐00100, Nairobi, Kenya</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup xml:lang="en"><keyword xml:id="k1"><i>Frankliniella occidentalis</i></keyword><keyword xml:id="k2"><i>Frankliniella schultzei</i></keyword><keyword xml:id="k3"><i>Hydatothrips aldolfifriderici</i></keyword><keyword xml:id="k4"><i>Megalurothrips sjostedti</i></keyword><keyword xml:id="k5">intercropping</keyword><keyword xml:id="k6">Thysanoptera</keyword><keyword xml:id="k7">Thripidae</keyword><keyword xml:id="k8">Fabaceae</keyword><keyword xml:id="k9"><i>Phaseolus vulgaris</i></keyword><keyword xml:id="k10">natural enemies</keyword><keyword xml:id="k11">associational resistance</keyword></keywordGroup><abstractGroup><abstract type="main" xml:lang="en"><title type="main">Abstract</title><p>The study aimed at determining thrips species composition and thrips population density on French bean planted as a sole crop and as an intercrop with either sunflower, Irish potato, or baby corn, in various combinations. Field experiments were conducted in two seasons to examine: (1) thrips population development and thrips species composition over time, (2) effect of intercrops on thrips population density and natural enemies, and (3) effect of intercrops on French bean yield. The experiments were conducted at the Kenya Agricultural Research Institute, Embu, Kenya in a randomized complete block design with four replicates. The thrips population on French beans increased with time. It showed a peak at the flowering stage then started declining when the crops were nearing senescence. French beans hosted four thrips species, <i>Megalurothrips sjostedti</i> (Trybom), <i>Frankliniella schultzei</i> (Trybom), <i>Frankliniella occidentalis</i> (Pergande), and <i>Hydatothrips aldolfifriderici</i> (Karny) (all Thysanoptera: Thripidae) in order of decreasing abundance. The main thrips species on Irish potato and sunflower was <i>F. schultzei</i>. Baby corn hosted only <i>Frankliniella williamsi</i> (Hood) and <i>Thrips pusillus</i> (Bagnall). A monocrop of French bean hosted more thrips than a French bean intercrop mix. Thrips natural enemies such as <i>Orius</i> spp. and <i>Ceranisus</i> spp. were recorded in all crop plants but in especially high numbers on French bean and baby corn, respectively. Plots with French bean alone had about 1.4 times higher yields compared to intercropped plots of French bean with sunflower and French bean with baby corn. However, the percentage of pods that could get rejected on the market due to thrips damage was highest on plots with French bean alone (68 and 63%) and lowest on plots with French bean and baby corn (35 and 37%) in the first and second seasons, respectively. This study showed that a complex of thrips is found in the field and its composition varies with crop stage and species. Intercropping French bean with other crops compromises on French bean yield but reduces damage to the French bean pods, thereby enhancing marketable yield.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Effect of intercrops on thrips species composition and population abundance on French beans in Kenya</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Effect of intercrops on thrips</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Effect of intercrops on thrips species composition and population abundance on French beans in Kenya</title></titleInfo><name type="personal"><namePart type="given">J. O.</namePart><namePart type="family">Nyasani</namePart><affiliation>Kenya Agricultural Research Institute, PO Box 27‐60100, Embu, Kenya</affiliation><affiliation>Leibniz Universität Hannover, Institute of Plant Diseases and Plant Protection, Herrenhäuser Strasse 2, 30419 Hannover, Germany</affiliation><affiliation>International Centre of Insect Physiology and Ecology, PO Box 30772‐00100, Nairobi, Kenya</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.</namePart><namePart type="family">Meyhöfer</namePart><affiliation>Leibniz Universität Hannover, Institute of Plant Diseases and Plant Protection, Herrenhäuser Strasse 2, 30419 Hannover, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">S.</namePart><namePart type="family">Subramanian</namePart><affiliation>International Centre of Insect Physiology and Ecology, PO Box 30772‐00100, Nairobi, Kenya</affiliation><affiliation>E-mail: ssubramania@icipe.org</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">H.‐M.</namePart><namePart type="family">Poehling</namePart><affiliation>Leibniz Universität Hannover, Institute of Plant Diseases and Plant Protection, Herrenhäuser Strasse 2, 30419 Hannover, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><place><placeTerm type="text">Oxford, UK</placeTerm></place><dateIssued encoding="w3cdtf">2012-03</dateIssued><edition>Accepted: 12 December 2011</edition><copyrightDate encoding="w3cdtf">2012</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">5</extent><extent unit="tables">3</extent></physicalDescription><abstract lang="en">The study aimed at determining thrips species composition and thrips population density on French bean planted as a sole crop and as an intercrop with either sunflower, Irish potato, or baby corn, in various combinations. Field experiments were conducted in two seasons to examine: (1) thrips population development and thrips species composition over time, (2) effect of intercrops on thrips population density and natural enemies, and (3) effect of intercrops on French bean yield. The experiments were conducted at the Kenya Agricultural Research Institute, Embu, Kenya in a randomized complete block design with four replicates. The thrips population on French beans increased with time. It showed a peak at the flowering stage then started declining when the crops were nearing senescence. French beans hosted four thrips species, Megalurothrips sjostedti (Trybom), Frankliniella schultzei (Trybom), Frankliniella occidentalis (Pergande), and Hydatothrips aldolfifriderici (Karny) (all Thysanoptera: Thripidae) in order of decreasing abundance. The main thrips species on Irish potato and sunflower was F. schultzei. Baby corn hosted only Frankliniella williamsi (Hood) and Thrips pusillus (Bagnall). A monocrop of French bean hosted more thrips than a French bean intercrop mix. Thrips natural enemies such as Orius spp. and Ceranisus spp. were recorded in all crop plants but in especially high numbers on French bean and baby corn, respectively. Plots with French bean alone had about 1.4 times higher yields compared to intercropped plots of French bean with sunflower and French bean with baby corn. However, the percentage of pods that could get rejected on the market due to thrips damage was highest on plots with French bean alone (68 and 63%) and lowest on plots with French bean and baby corn (35 and 37%) in the first and second seasons, respectively. This study showed that a complex of thrips is found in the field and its composition varies with crop stage and species. Intercropping French bean with other crops compromises on French bean yield but reduces damage to the French bean pods, thereby enhancing marketable yield.</abstract><subject lang="en"><genre>keywords</genre><topic>Frankliniella occidentalis</topic><topic>Frankliniella schultzei</topic><topic>Hydatothrips aldolfifriderici</topic><topic>Megalurothrips sjostedti</topic><topic>intercropping</topic><topic>Thysanoptera</topic><topic>Thripidae</topic><topic>Fabaceae</topic><topic>Phaseolus vulgaris</topic><topic>natural enemies</topic><topic>associational resistance</topic></subject><relatedItem type="host"><titleInfo><title>Entomologia Experimentalis et Applicata</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0013-8703</identifier><identifier type="eISSN">1570-7458</identifier><identifier type="DOI">10.1111/(ISSN)1570-7458</identifier><identifier type="PublisherID">EEA</identifier><part><date>2012</date><detail type="volume"><caption>vol.</caption><number>142</number></detail><detail type="issue"><caption>no.</caption><number>3</number></detail><extent unit="pages"><start>236</start><end>246</end><total>11</total></extent></part></relatedItem><identifier type="istex">D4816E82F085938EF40F455E9E3FD379B9453213</identifier><identifier type="DOI">10.1111/j.1570-7458.2011.01217.x</identifier><identifier type="ArticleID">EEA1217</identifier><accessCondition type="use and reproduction" contentType="copyright">© 2012 The Authors. 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