Abstract
Castor bean crops are agriculturally relevant due to the quality and versatility of their oil, both for the chemical industry and for biodiesel production. Proper weed management is important for both the cultivation and the yield of castor bean crops; therefore, the intention of the present work is to review pertinent information regarding weed management, including the studies regarding weed interference periods, chemical controls for use in different crop production systems and herbicide selectivity, for castor bean crops. Weed science research for castor bean crops is scarce. One of the main weed management challenges for castor bean crops is the absence of herbicides registered with the Ministry of Agriculture, Livestock and Food Supply (MALFS). Research for viable herbicides for weed control in castor bean crops should be directed by research and/or rural extension institutions, associations and farmers cooperatives, as well as by manufactures, for the registration of these selective herbicides, which would be primarily used to control eudicotyledons in castor bean crops. New studies involving the integration of weed control methods in castor bean also may increase the efficiency of weed management, for both small farmers using traditional crop methods in the Brazilian Northeast region, as well as for areas with the potential for large scale production, using conservation tillage systems, such as the no-tillage crop production system.
Highlights
Estratégias de manejo de plantas daninhas na cultura da mamoneiraConsiderando a importância do manejo de plantas daninhas para o cultivo e produtividade da mamoneira, o presente trabalho teve como objetivo abordar as principais informações disponíveis sobre o assunto, entre as quais foram destacados os estudos de períodos de interferência das plantas daninhas, controle químico em diferentes sistemas de produção e seletividade de herbicidas à cultura
Castor bean (Ricinus communis L.) is an oilseed crop of economic importance, the seeds are used to produce castor oil, which possesses excellent properties and is widely used as an industrial raw material
Castor bean crops are considered highly sensitive to weed competition (FERREIRA et al, 2009a), and the employed technology in castor bean cultivation and weed management has been quite variable between the different Brazilian production regions (MACIEL, 2006)
Summary
Considerando a importância do manejo de plantas daninhas para o cultivo e produtividade da mamoneira, o presente trabalho teve como objetivo abordar as principais informações disponíveis sobre o assunto, entre as quais foram destacados os estudos de períodos de interferência das plantas daninhas, controle químico em diferentes sistemas de produção e seletividade de herbicidas à cultura. Verificou-se que os resultados de pesquisa sobre o manejo da cultura da mamona são escassos, nos mais variados aspectos da ciência das plantas daninhas. Novos estudos envolvendo a integração de métodos de controle de plantas daninhas em mamoneira também podem aumentar a eficiência no manejo, tanto para pequenas propriedades da tradicional região do Nordeste brasileiro, assim como para áreas com potencial de produção em larga escala, sob sistemas conservacionistas, como é o caso da semeadura direta.
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