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      Effect of soil management on the white grub population and damage in soybean Translated title: Efeito do manejo de solo na população e nos danos de corós em soja


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          To evaluate the effect of soil management systems on population of white grubs, (Phyllophaga cuyabana Moser), and on its damage in soybean, experiments were set up under no-tillage and conventional tillage (one disk plow, and a leveling disk harrow) areas. Primary tillage equipment, used in other soil management systems, such as moldboard plow, disk plow, chisel plow and heavy duty disk harrow were also tested. Fluctuation of P. cuyabana population and the extent of its damage to soybean was similar under no-tillage and conventional tillage systems. Results comparing a range of primary tillage equipment showed that it affected soil insect populations differently, depending on the time during the season in which tillage was executed. Larval mortality could mostly be attributed to their exposure to adverse factors, soon after tillage, than to changes in soil conditions. Reduction of white grub population was more evident in plots managed by heavier equipment, such as the moldboard plow. Soil tillage could be one component within the soil pest management system in soybean, however, its use can not be generalized.

          Translated abstract

          Foram realizados vários experimentos para avaliar o efeito de diferentes sistemas de manejo de solo na população de corós (Phyllophaga cuyabana Moser), e seus danos em soja, em áreas de plantio direto e de preparo convencional do solo (preparo primário com arado de discos e uma gradagem niveladora). Vários implementos utilizados no preparo primário de solo, como arado de aivecas, arado de discos, escarificador e grade aradora também foram avaliados. A flutuação populacional de corós e a intensidade de dano causado por eles foram similares nas áreas de plantio direto e de preparo convencional. Os implementos de preparo primário do solo afetaram a população de corós diferentemente, dependendo da época em que o preparo de solo foi executado. A mortalidade larval pode ser atribuída mais à exposição a fatores adversos logo após o preparo, do que a mudanças nas condições do solo. A redução na população de corós foi mais evidente nas parcelas preparadas com implementos mais pesados, como arado de aivecas. O manejo de solo pode ser um componente dentro do manejo de pragas do solo em soja, porém sua utilização não pode ser generalizada.

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          Most cited references19

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          Arthropods and Other Invertebrates in Conservation-Tillage Agriculture

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            Movement of First-instar Western Corn Rootworms (Coleoptera: Chrysomelidae) in Soil

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              • Abstract: not found
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              Effects of Weeds on the Diversity and Abundance of Insects in Soybeans1


                Author and article information

                Pesquisa Agropecuária Brasileira
                Pesq. agropec. bras.
                Embrapa Secretaria de Pesquisa e Desenvolvimento; Pesquisa Agropecuária Brasileira (Brasília, DF, Brazil )
                May 2000
                : 35
                : 5
                : 887-894
                [02] Campinas SP orgnameDep. de Zoologia Brazil
                [01] Londrina PR orgnameEmbrapa orgdiv1Centro Nacional de Pesquisa de Soja Brazil lenita@ 123456cnpso.embrapa.br
                S0100-204X2000000500004 S0100-204X(00)03500504

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                : 18 June 1999
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 21, Pages: 8

                SciELO Brazil


                Melolonthidae,Phyllophaga cuyabana,cultural control,pest control,Glycine max,Coleoptera,Scarabaeoidea,controle de culturas,controle de pragas


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