Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/47960
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dc.contributor.authorSILVA, A. de A. e.pt_BR
dc.contributor.authorVARANDA. E. M.pt_BR
dc.contributor.authorRASSINI, J. B.pt_BR
dc.date.accessioned2011-08-18T01:00:37Z-
dc.date.available2011-08-18T01:00:37Z-
dc.date.created2007-08-23pt_BR
dc.date.issued2007pt_BR
dc.identifier.citationBragantia, Campinas, v. 66, n. 2, p. 255-262, 2007.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/47960pt_BR
dc.descriptionIt is important to understand the effects of weather, insect density and plant cultivar on insect abundance to predict and prevent crop production loss. The present work investigated the influence of such factors on aphid in alfalfa during one year (short term). Data was collected from September/1997 to August/1998 at Canchin Farm (CCPSE-EMBRAPA), São Carlos, State of São Paulo, Brazil. Weather conditions had, in general, little effect on the variation of aphid populations, but Therioaphis maculata abundance was negatively correlated to humidity. Moreover, high maximum temperatures and low levels of rainfall possible favored T. maculata high abundance on Crioula and P3 cultivars. Therefore, appropriate management of this species is required during hot and dry periods. Population variation of Acyrthosiphon spp., T. maculata and Aphis craccivora seems to be regulated by density dependent processes. Resistant cultivar CUF 101 had a lower abundance of T. maculata and A. craccivora and a narrower population variation than the other cultivars and may reduce their abundance on field. Long-term studies on population dynamics including the effect of climatic conditions and density-dependent factors on plant quality will contribute to pest management in alfalfa fields.eng
dc.language.isoengpt_BR
dc.rightsopenAccesspt_BR
dc.subjectHerbivorypt_BR
dc.subjectResistancept_BR
dc.titleWeather, cultivar and density-dependent processes influence on aphid in alfafa.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2011-08-18T01:00:37Zpt_BR
dc.subject.thesagroDinâmica Populacionalpt_BR
dc.subject.thesagroMedicago Sativapt_BR
dc.subject.thesagroResistênciapt_BR
dc.subject.thesagroHemípteraeng
dc.subject.nalthesaurusPopulation dynamicseng
riaa.ainfo.id47960pt_BR
riaa.ainfo.lastupdate2011-08-17pt_BR
dc.identifier.doi10.1590/S0006-87052007000200012eng
dc.contributor.institutionALEXANDRE DE A. E SILVA, IPEPATROpt_BR
dc.contributor.institutionELENICE MOURO VARANDA, FFCLRPeng
dc.contributor.institutionJOAQUIM BARTOLOMEU RASSINI, CPPSE.eng
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