Mutagênese induzida em grama de janeiro por etil-meta-sulfonato e seu efeito no controle da cigarrinha
Resumo
Nesta pesquisa, a dose letal mediana (DL50) e a resistência à cigarrinha (Mahanarva andigena) foram determinadas, utilizando-se um agente mutagenizante etil meta-sulfonato (EMS) em capim-janeiro (Eriochloa polystachya Kunth) como meio de gerar mutações. O estudo foi realizado em nível de laboratório e casa de vegetação, utilizando um Desenho Aleatório Completo (DCA) com dez tratamentos e três repetições, que consistiu em 5 doses de EMS (0,00 %, 0,25 %, 0,50 %, 0,75 % e 1,00 %) por 2 tempos de impregnação (24 e 48 horas). De acordo com os resultados, as doses de etil meta-sulfonato (EMS) tiveram efeito na fixação dos estolões do capim-janeiro, apresentando alto índice de deflação em doses superiores a 0,50%. Os tratamentos com doses de 0,25% EMS às 48 horas obtiveram o melhor desempenho agronômico até 95 dias, onde a altura das plantas teve seu melhor desenvolvimento com uso próximo ao determinado como LD50 (0,32%). O capim-janeiro impregnado com EMS apresentou danos leves causados pelo salivazo.
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Direitos de Autor (c) 2022 Juan Gómez Villalva; Fernando Cobos Mora; Edwin Hasang Moran; Ana Luzmeira Eguiluz de la Barra y Isrrael Cortez Herrera
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