Selectivity of pre and postemergence herbicides in single or combined applications in castor crop

Autor: COSTA, A. G. F., SOFIATTI, V., MACIEL, C. D. G., FREITAS, J. G., CARDOSO, G. D., WIRGUES, L. M.
Přispěvatelé: AUGUSTO GUERREIRO FONTOURA COSTA, CNPA, VALDINEI SOFIATTI, CNPA, CLEBER D. G. MACIEL, UNIVERSIDADE ESTADUAL DO CENTRO OESTE, JALMI GUEDES FREITAS, CNPA, GLEIBSON DIONIZIO CARDOSO, CNPA, LARISSA M. WIRGUES, UNIVERSIDADE ESTADUAL DO CENTRO OESTE.
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice)
Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
Popis: One of the main challenges in castor crop (Ricinus communis L.) production is efficient weed management mainly due to limited options of selective herbicides. This study evaluated the selectivity of herbicides applied alone or in combination in pre- and postemergence applications in castor crop. Two field experiments were carried out under irrigation conditions in a semi-arid region of Northeast Brazil. It was found that the visual symptoms of phytointoxication of the herbicides used on castor were mild in both experiments. Consequently, there were no significant interferences on plant height, number of racemes, and grain (seed) yield. Pre-emergence applications (g ha−1) of trifluralin (1800), pendimethalin (1500), clomazone (750), clomazone + trifluralin (750 + 1800), and clomazone + pendimethalin (750 + 1500) followed by chlorimuron-ethyl in postemergence (15 g ha−1) are selective to castor. The application (g ha−1) of pendimethalin + clomazone (1000 + 500) in pre-emergence, associated with chlorimuron-ethyl (10 and 15), metamitron (2800 and 4200), ethoxysulfuron (60 and 80), or halosulfuron-methyl (75 and 112.5) in one or two applications in postemergence, as single or split applications, in an interval of 14 days, are selective to castor crop. Made available in DSpace on 2022-02-11T02:02:21Z (GMT). No. of bitstreams: 1 SELECTIVITY-OF-PRE-AND-POSTEMERGENCE-HERBICIDES.pdf: 701771 bytes, checksum: c88b0bc0c0a06b28295d628003a4bc5e (MD5) Previous issue date: 2021
Databáze: OpenAIRE
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