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dc.contributor.authorZundel, C.
dc.contributor.authorNagel, P.
dc.contributor.authorHanna, R.
dc.contributor.authorKorner, F.
dc.contributor.authorScheidegger, Urs C.
dc.date.accessioned2019-12-04T11:11:38Z
dc.date.available2019-12-04T11:11:38Z
dc.date.issued2009
dc.identifier.citationZundel, C., Nagel, P., Hanna, R., Korner, F. & Scheidegger, U. (2009). Environment and host‐plant genotype effects on the seasonal dynamics of a predatory mite on cassava in sub‐humid tropical Africa. Agricultural and Forest Entomology, 11(3), 321-331.
dc.identifier.issn1461-9555
dc.identifier.urihttps://hdl.handle.net/20.500.12478/2470
dc.description.abstractIn tropical dry seasons, survival of small arthropods such as predatory mites is often negatively affected by low relative humidity (RH). For species that do not diapause or migrate to refuges, the ability of the habitat to mitigate climatic conditions becomes crucial. 2 The relative effect of macro-habitat (dry grassland hill, humid multiple cropping area, humid riparian forest) and microhabitat (host-plant genotypes with hairy, semi-hairy and glabrous apices) on the seasonal dynamics of the phytoseiid mite Typhlodromalus aripo , a predator of Mononychellus tanajoa on cassava, was examined in a field experiment during a dry season. The effect of RH and plant genotype on T. aripo egg survival was determined in an environment control chamber. 3 Predator abundance was higher in humid multiple cropping areas and on hairy cassava compared with the other habitat types and cassava genotypes. 4 Discriminant and regression analyses showed that the predator’s dry season per-sistence was related to high RH, high plant vigour and hairy apices, but not to prey abundance. 5 In the controlled climate experiment, the effect of host-plant morphology was evident only at the intermediate RH level of 55%. An effect of apex hairiness was not found. 6 It is concluded that the effect of genotype on T. aripo persistence diminishes un-der low RH conditions, and that supportive effects of apex hairs become effective only in the field, probably through protection from wind and/or intraguild preda-tion. Humid multiple cropping areas planted with hairy and vigorous cassava genotypes are suitable dry season reservoirs for T. aripo .
dc.description.sponsorshipSwiss Agency for Development and Cooperation
dc.description.sponsorshipInternational Fund for Agricultural Development
dc.format.extent321-331
dc.language.isoen
dc.subjectApex Pubescence
dc.subjectClassical Biological Control
dc.subjectManihot Esculenta
dc.subjectMononychellus Tanajoa
dc.subjectPlant – Predator Interaction
dc.subjectRelative Humidity
dc.subjectTyphlodromalus Aripo
dc.subjectMorphology
dc.subjectNeotropical
dc.titleEnvironment and hostplant genotype effects on the seasonal dynamics of a predatory mite on cassava in subhumid tropical Africa
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationSwiss College of Agriculture
cg.contributor.affiliationUniversity of Basel
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationStatistical Analysis and Consulting
cg.coverage.regionAcp
cg.coverage.regionAfrica
cg.coverage.regionEurope
cg.coverage.regionWest Africa
cg.coverage.countrySwitzerland
cg.coverage.countryBenin
cg.isijournalISI Journal
cg.authorship.typesCGIAR and advanced research institute
cg.iitasubjectCassava
cg.iitasubjectDisease Control
cg.iitasubjectFarm Management
cg.iitasubjectGenetic Improvement
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectPlant Production
cg.journalAgricultural and Forest Entomology
cg.howpublishedFormally Published
cg.accessibilitystatusLimited Access
local.dspaceid93221
cg.identifier.doihttps://dx.doi.org/10.1111/j.1461-9563.2009.00429.x


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