Direct and indirect influences of the weaver ant Oecophylla smaragdina on citrus farmers' pest perceptions and management practices in the Mekong Delta, Vietnam
Identifieur interne : 002C72 ( Main/Curation ); précédent : 002C71; suivant : 002C73Direct and indirect influences of the weaver ant Oecophylla smaragdina on citrus farmers' pest perceptions and management practices in the Mekong Delta, Vietnam
Auteurs : P. Van Mele [Royaume-Uni] ; N. T. T. Cuc [Viêt Nam] ; A. Van Huis [Pays-Bas]Source :
- International journal of pest management [ 0967-0874 ] ; 2002.
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Abstract
In the Mekong Delta, Vietnam, the predatory weaver ant Oecophylla smaragdina was abundant in about 75% of the sweet orange and 25% of the Tieu mandarin orchards. With a three-level scale (low, moderate, high), farmers assessed the incidence, severity and yield loss of fruit caused by major pests. With abundant O. smaragdina, sweet orange farmers assessed a lower pest infestation or yield loss for the citrus stinkbug Rhynchocoris humeralis, the aphids Toxoptera aurantii and T. citricidus, the leaf-feeding caterpillars Papilio spp., and inflorescence eaters. In Tieu mandarin, the use of agrochemicals was higher than in sweet orange, and pest risk assessment was not correlated with ant abundance, except for aphid infestation, which was rated lower. The number of sprays targeting a particular pest was positively correlated both with pest incidence and severity ratings and was negatively correlated with ant abundance. Irrespective of O. smaragdina abundance, citrus leafminer Phyllocnistis citrella was one of the major spray targets. Citrus red mite Panonychus citri was the most important target in Tieu mandarin, accounting for >30% of all target sprays. Stimulating O. smaragdina as a biological control agent in Tieu mandarin will only be successful when citrus leafminer and mites can be controlled simultaneously without excessive chemical treatments. The concept of ant predation, well known by most farmers, could be used as a starting point to educate farmers about the existence and role of predatory mites. Farmer participatory training and research that focuses on experiential learning and field observations offers a promising approach to enhance farmers' perceptions of pests, their ecological causalities and non-chemical alternative management options.
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Cuc</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Plant Protection, Cantho University</s1><s2>Can Tho</s2><s3>VNM</s3><sZ>2 aut.</sZ></inist:fA14><country>Viêt Nam</country><wicri:noRegion>Can Tho</wicri:noRegion></affiliation></author><author><name sortKey="Van Huis, A" sort="Van Huis, A" uniqKey="Van Huis A" first="A." last="Van Huis">A. Van Huis</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>Laboratory of Entomology, Wageningen University, PO Box 8031</s1><s2>6700 EH Wageningen</s2><s3>NLD</s3><sZ>3 aut.</sZ></inist:fA14><country>Pays-Bas</country><wicri:noRegion>6700 EH Wageningen</wicri:noRegion><orgName type="university">Université de Wageningue</orgName><placeName><settlement type="city">Wageningue</settlement><region nuts="2">Gueldre (province)</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">02-0479500</idno><date when="2002">2002</date><idno type="stanalyst">PASCAL 02-0479500 INIST</idno><idno type="RBID">Pascal:02-0479500</idno><idno type="wicri:Area/PascalFrancis/Corpus">000813</idno><idno type="wicri:Area/PascalFrancis/Curation">000191</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000812</idno><idno type="wicri:doubleKey">0967-0874:2002:Van Mele P:direct:and:indirect</idno><idno type="wicri:Area/Main/Merge">002E51</idno><idno type="wicri:Area/Main/Curation">002C72</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Direct and indirect influences of the weaver ant Oecophylla smaragdina on citrus farmers' pest perceptions and management practices in the Mekong Delta, Vietnam</title><author><name sortKey="Van Mele, P" sort="Van Mele, P" uniqKey="Van Mele P" first="P." last="Van Mele">P. Van Mele</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>CABI Bioscience UK Centre, Bakeham Lane</s1><s2>Egham TW20 9TY</s2><s3>GBR</s3><sZ>1 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Egham TW20 9TY</wicri:noRegion></affiliation></author><author><name sortKey="Cuc, N T T" sort="Cuc, N T T" uniqKey="Cuc N" first="N. T. T." last="Cuc">N. T. T. Cuc</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Department of Plant Protection, Cantho University</s1><s2>Can Tho</s2><s3>VNM</s3><sZ>2 aut.</sZ></inist:fA14><country>Viêt Nam</country><wicri:noRegion>Can Tho</wicri:noRegion></affiliation></author><author><name sortKey="Van Huis, A" sort="Van Huis, A" uniqKey="Van Huis A" first="A." last="Van Huis">A. Van Huis</name><affiliation wicri:level="4"><inist:fA14 i1="03"><s1>Laboratory of Entomology, Wageningen University, PO Box 8031</s1><s2>6700 EH Wageningen</s2><s3>NLD</s3><sZ>3 aut.</sZ></inist:fA14><country>Pays-Bas</country><wicri:noRegion>6700 EH Wageningen</wicri:noRegion><orgName type="university">Université de Wageningue</orgName><placeName><settlement type="city">Wageningue</settlement><region nuts="2">Gueldre (province)</region></placeName></affiliation></author></analytic><series><title level="j" type="main">International journal of pest management</title><title level="j" type="abbreviated">Int. j. pest manag.</title><idno type="ISSN">0967-0874</idno><imprint><date when="2002">2002</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">International journal of pest management</title><title level="j" type="abbreviated">Int. j. pest manag.</title><idno type="ISSN">0967-0874</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Citrus reticulata</term><term>Citrus sinensis</term><term>Damage</term><term>Decision making</term><term>Farmer</term><term>Fertilizers</term><term>Integrated pest management</term><term>Orchard</term><term>Panonychus citri</term><term>Pest management</term><term>Pesticides</term><term>Predator efficiency</term><term>Vietnam</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Lutte antidéprédateur</term><term>Lutte intégrée</term><term>Verger</term><term>Dégât</term><term>Prise décision</term><term>Efficacité prédatrice</term><term>Citrus sinensis</term><term>Citrus reticulata</term><term>Panonychus citri</term><term>Pesticide</term><term>Engrais</term><term>Vietnam</term><term>Agriculteur</term><term>Oecophylla smaragdina</term><term>Toxoptera citricidus</term><term>Phyllocnistis citrella</term><term>Delta Mékong</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Verger</term><term>Pesticide</term><term>Engrais</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In the Mekong Delta, Vietnam, the predatory weaver ant Oecophylla smaragdina was abundant in about 75% of the sweet orange and 25% of the Tieu mandarin orchards. With a three-level scale (low, moderate, high), farmers assessed the incidence, severity and yield loss of fruit caused by major pests. With abundant O. smaragdina, sweet orange farmers assessed a lower pest infestation or yield loss for the citrus stinkbug Rhynchocoris humeralis, the aphids Toxoptera aurantii and T. citricidus, the leaf-feeding caterpillars Papilio spp., and inflorescence eaters. In Tieu mandarin, the use of agrochemicals was higher than in sweet orange, and pest risk assessment was not correlated with ant abundance, except for aphid infestation, which was rated lower. The number of sprays targeting a particular pest was positively correlated both with pest incidence and severity ratings and was negatively correlated with ant abundance. Irrespective of O. smaragdina abundance, citrus leafminer Phyllocnistis citrella was one of the major spray targets. Citrus red mite Panonychus citri was the most important target in Tieu mandarin, accounting for >30% of all target sprays. Stimulating O. smaragdina as a biological control agent in Tieu mandarin will only be successful when citrus leafminer and mites can be controlled simultaneously without excessive chemical treatments. The concept of ant predation, well known by most farmers, could be used as a starting point to educate farmers about the existence and role of predatory mites. Farmer participatory training and research that focuses on experiential learning and field observations offers a promising approach to enhance farmers' perceptions of pests, their ecological causalities and non-chemical alternative management options.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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