Diet of Zonocerus variegatus (Linné, 1758) (Orth., Acrididae) in cassava fields in Bénin
Identifieur interne : 002A96 ( Main/Exploration ); précédent : 002A95; suivant : 002A97Diet of Zonocerus variegatus (Linné, 1758) (Orth., Acrididae) in cassava fields in Bénin
Auteurs : Ph. Le Gall [France] ; Z. Djihou [Bénin] ; G. Tchenga [Bénin] ; Ch. J. LomerSource :
- Journal of Applied Entomology [ 0931-2048 ] ; 2003-08.
Descripteurs français
- Wicri :
- topic : Afrique occidentale.
English descriptors
Abstract
Abstract: This paper presents the results of a study on the diet of Zonocerus variegatus in cassava agro‐ecosystems at Allada, south Benin. The diet was determined by the analysis of plant fragments in the faeces of insects sampled in the fields. The grasshoppers studied consumed 21 plant species among the 81 found in the fields. Cassava, maize, Mallotus oppositifolius and Chromolaena odorata were the major food plants for Z. variegatus in this system. The presence of Z. variegatus in different fields was observed depending on the season and the presence of certain plant species. There was no relationship between plant frequency in the diet and in the field. Cassava was the preferred food resource for mature nymphs and adults. During the dry season, young nymphs stayed near the hatching sites and where good food resources were available. At this time, the grasshoppers were present in a field where cassava was not abundant but where maize and weeds were available. During the dry season, Z. variegatus had a broader diet than during the wet season. This contradicts the current hypothesis that the water content of plants and the floral diversity determines food preference. The dry season is also the time when C. odorata leaves were found in the faeces of both adults and nymphs. These observations made in West Africa are similar to those made in Central Africa, particularly for the number of plant species found in the faeces, 21 (26% of all plant species found in the fields) in Bénin and 17 (23%) in the Congo. The increase of the sample size and the great differences between the ecoregional situation of the study sites do not substantially change the number of plant species included in the diets. In the area covered by this study, C. odorata is not the major substitute for cassava during the dry season, although it remains a major food source and an especially visible food resource.
Url:
DOI: 10.1046/j.1439-0418.2003.00762.x
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001334
- to stream Istex, to step Curation: 001334
- to stream Istex, to step Checkpoint: 000866
- to stream Main, to step Merge: 002C60
- to stream Main, to step Curation: 002A96
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Diet of Zonocerus variegatus (Linné, 1758) (Orth., Acrididae) in cassava fields in Bénin</title><author><name sortKey="Le Gall, Ph" sort="Le Gall, Ph" uniqKey="Le Gall P" first="Ph." last="Le Gall">Ph. Le Gall</name></author><author><name sortKey="Djihou, Z" sort="Djihou, Z" uniqKey="Djihou Z" first="Z." last="Djihou">Z. Djihou</name></author><author><name sortKey="Tchenga, G" sort="Tchenga, G" uniqKey="Tchenga G" first="G." last="Tchenga">G. Tchenga</name></author><author><name sortKey="Lomer, Ch J" sort="Lomer, Ch J" uniqKey="Lomer C" first="Ch. J." last="Lomer">Ch. J. Lomer</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:25EA5EED09268B72A36497C5EB4A5A6E66CC2BFB</idno><date when="2003" year="2003">2003</date><idno type="doi">10.1046/j.1439-0418.2003.00762.x</idno><idno type="url">https://api.istex.fr/document/25EA5EED09268B72A36497C5EB4A5A6E66CC2BFB/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001334</idno><idno type="wicri:Area/Istex/Curation">001334</idno><idno type="wicri:Area/Istex/Checkpoint">000866</idno><idno type="wicri:doubleKey">0931-2048:2003:Le Gall P:diet:of:zonocerus</idno><idno type="wicri:Area/Main/Merge">002C60</idno><idno type="wicri:Area/Main/Curation">002A96</idno><idno type="wicri:Area/Main/Exploration">002A96</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Diet of Zonocerus variegatus (Linné, 1758) (Orth., Acrididae) in cassava fields in Bénin</title><author><name sortKey="Le Gall, Ph" sort="Le Gall, Ph" uniqKey="Le Gall P" first="Ph." last="Le Gall">Ph. Le Gall</name><affiliation wicri:level="1"><country xml:lang="fr" wicri:curation="lc">France</country><wicri:regionArea>IRDc/o CNRS Laboratoire Population, Génétique et Evolution, Gif‐sur‐Yvette</wicri:regionArea><wicri:noRegion>Gif‐sur‐Yvette</wicri:noRegion><wicri:noRegion>Gif‐sur‐Yvette</wicri:noRegion></affiliation></author><author><name sortKey="Djihou, Z" sort="Djihou, Z" uniqKey="Djihou Z" first="Z." last="Djihou">Z. Djihou</name><affiliation wicri:level="1"><country xml:lang="fr">Bénin</country><wicri:regionArea>Plant Health Management Division, International Institute of Tropical Agronomy, Cotonou</wicri:regionArea><wicri:noRegion>Cotonou</wicri:noRegion></affiliation></author><author><name sortKey="Tchenga, G" sort="Tchenga, G" uniqKey="Tchenga G" first="G." last="Tchenga">G. Tchenga</name><affiliation wicri:level="1"><country xml:lang="fr">Bénin</country><wicri:regionArea>Plant Health Management Division, International Institute of Tropical Agronomy, Cotonou</wicri:regionArea><wicri:noRegion>Cotonou</wicri:noRegion></affiliation></author><author><name sortKey="Lomer, Ch J" sort="Lomer, Ch J" uniqKey="Lomer C" first="Ch. J." last="Lomer">Ch. J. Lomer</name></author></analytic><monogr></monogr><series><title level="j">Journal of Applied Entomology</title><idno type="ISSN">0931-2048</idno><idno type="eISSN">1439-0418</idno><imprint><publisher>Blackwell Verlag GmbH</publisher><pubPlace>Berlin, Germany</pubPlace><date type="published" when="2003-08">2003-08</date><biblScope unit="volume">127</biblScope><biblScope unit="issue">7</biblScope><biblScope unit="page" from="435">435</biblScope><biblScope unit="page" to="440">440</biblScope></imprint><idno type="ISSN">0931-2048</idno></series><idno type="istex">25EA5EED09268B72A36497C5EB4A5A6E66CC2BFB</idno><idno type="DOI">10.1046/j.1439-0418.2003.00762.x</idno><idno type="ArticleID">JEN762</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0931-2048</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>West Africa</term><term>Zonocerus variegatus</term><term>cassava</term><term>diet</term><term>insect–plant relationships</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Afrique occidentale</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Abstract: This paper presents the results of a study on the diet of Zonocerus variegatus in cassava agro‐ecosystems at Allada, south Benin. The diet was determined by the analysis of plant fragments in the faeces of insects sampled in the fields. The grasshoppers studied consumed 21 plant species among the 81 found in the fields. Cassava, maize, Mallotus oppositifolius and Chromolaena odorata were the major food plants for Z. variegatus in this system. The presence of Z. variegatus in different fields was observed depending on the season and the presence of certain plant species. There was no relationship between plant frequency in the diet and in the field. Cassava was the preferred food resource for mature nymphs and adults. During the dry season, young nymphs stayed near the hatching sites and where good food resources were available. At this time, the grasshoppers were present in a field where cassava was not abundant but where maize and weeds were available. During the dry season, Z. variegatus had a broader diet than during the wet season. This contradicts the current hypothesis that the water content of plants and the floral diversity determines food preference. The dry season is also the time when C. odorata leaves were found in the faeces of both adults and nymphs. These observations made in West Africa are similar to those made in Central Africa, particularly for the number of plant species found in the faeces, 21 (26% of all plant species found in the fields) in Bénin and 17 (23%) in the Congo. The increase of the sample size and the great differences between the ecoregional situation of the study sites do not substantially change the number of plant species included in the diets. In the area covered by this study, C. odorata is not the major substitute for cassava during the dry season, although it remains a major food source and an especially visible food resource.</div></front></TEI><affiliations><list><country><li>Bénin</li><li>France</li></country></list><tree><noCountry><name sortKey="Lomer, Ch J" sort="Lomer, Ch J" uniqKey="Lomer C" first="Ch. J." last="Lomer">Ch. J. Lomer</name></noCountry><country name="France"><noRegion><name sortKey="Le Gall, Ph" sort="Le Gall, Ph" uniqKey="Le Gall P" first="Ph." last="Le Gall">Ph. Le Gall</name></noRegion></country><country name="Bénin"><noRegion><name sortKey="Djihou, Z" sort="Djihou, Z" uniqKey="Djihou Z" first="Z." last="Djihou">Z. Djihou</name></noRegion><name sortKey="Tchenga, G" sort="Tchenga, G" uniqKey="Tchenga G" first="G." last="Tchenga">G. Tchenga</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Bois/explor/OrangerV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002A96 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 002A96 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Bois
|area= OrangerV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:25EA5EED09268B72A36497C5EB4A5A6E66CC2BFB
|texte= Diet of Zonocerus variegatus (Linné, 1758) (Orth., Acrididae) in cassava fields in Bénin
}}
| This area was generated with Dilib version V0.6.25. |  |