Dynamics of immature stages of Anopheles arabiensis and other mosquito species (Diptera: Culicidae) in relation to rice cropping in a rice agro-ecosystem in Kenya

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dc.contributor.authorMwangangi, Joseph
dc.contributor.authorShililu, Josephat
dc.contributor.authorMuturi, Ephantus
dc.contributor.authorGu, Weidong
dc.contributor.authorMbogo, Charles
dc.contributor.authorKabiru, Ephantus
dc.contributor.authorJacob, Benjamin
dc.contributor.authorGithure, John
dc.contributor.authorNovak, Robert
dc.date.accessioned2018-02-22T07:10:55Z
dc.date.available2018-02-22T07:10:55Z
dc.date.issued2006
dc.descriptionResearch Articleen_US
dc.description.abstractWe determined changes in species composition and densities of immature stages of Anopheles arabiensis mosquitoes in relation to rice growth cycle in order to generate data for developing larval control strategies in rice ecosystems. Experimental rice paddies (6.3m x 3.15m) exposed to natural colonization of mosquitoes were sampled weekly for two rice growing cycles between February 2004 and March 2005. Overall, 21,325 Anopheles larvae were collected, of which 91.9% were 1st and 2nd instars and 8.1% were 3rd and 4th instars. An. arabiensis was the predominant species (84.1%) with other species, An. pharoensis (13.5%), An. funestus (2.1%), An. coustani (0.3%), and An. maculipalpis (0.1%) accounting for only a small proportion of the anophelines collected. Culex quinquefasciatus (65.7%) was the predominant species among the non-anopheline species. Others species collected included: C. annulioris (9.9%), C. poicilipes (7.3%), C. tigripes (7.2%), C. duttoni (0.6%), Aedes aegypti (5.3%), Ae. cumminsii (3.5%), and Ae. vittatus (0.7%). The densities of the major anopheline species were closely related to rice stage and condition of the rice field. An. arabiensis, the predominant species, was most abundant over a three-week period after transplanting. Low densities of larvae were collected during the late vegetative, reproductive, and ripening phases of rice. An increase in larval density ten days post-transplanting was found to correlate with the application of fertilizer (sulphate of ammonia). Culicine and aedine species densities were significantly higher during the post-harvesting period. Our results suggest that the transplanting stage is favorable for the growth of immature stages of An. arabiensis and provides a narrow window for targeted larval intervention in riceen_US
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/18224
dc.language.isoenen_US
dc.publisherWileyen_US
dc.subjectRice growth cycleen_US
dc.subjectAnopheles larval speciesen_US
dc.subjectRice heighten_US
dc.subjectTillersen_US
dc.subjectWater depthen_US
dc.subjectLarval controlen_US
dc.titleDynamics of immature stages of Anopheles arabiensis and other mosquito species (Diptera: Culicidae) in relation to rice cropping in a rice agro-ecosystem in Kenyaen_US
dc.typeArticleen_US
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