O objetivo deste trabalho foi avaliar a sobrevivência, a viabilidade e o controle do fungo Alternaria sp. em sementes de feijão carioca das cultivares BRS Estilo (lotes 07, 12, 201, 202, 203) ABSTRACTThe aim of this study was to evaluate survival, viability and control of the fungus Alternaria sp. in common bean seeds of cultivars BRS Estilo (lots 07,12, 201, 202, 203), BRS Tangará (lots 01, 02, 37, 46) and in black bean seeds of cultivars IPR Tuiuiu (lots 10 and 11), IPR Uirapuru (lots 07, 08, 12), totaling 14 samples. At every 45 days from May 2014 to the end of storage (November 2014), two hundred seeds per sample were disinfected and subjected to seed health test on potato-dextrose-agar culture medium + antibiotics. Bean seeds of cultivars BRS Estilo and IPR Tuiuiu, harvested in the 2015 crop season at Muitos Capões Municipality, were subjected to the test with fungicides for Alternaria Soldatelli, P.; Casa, R.T.; Lima, A.; Ribeiro, Y.C.K.; Martins, F.C. Survival, viability and control of Alternaria sp. in common bean seeds. Summa Phytopathologica, v.43, n.3, p.193-198, 2017. sp. control. The test was carried out by treating the seeds with fungicides and sowing them on potato-dextrose-agar culture medium + antibiotics, with 200 seeds per treatment. Data of Alternaria sp. incidence as a function of storage time were subjected to regression analysis. The fungus was detected in all cultivars, lots and samplings. There was a mean reduction in the incidence of Alternaria sp. cultivars as a function of time from 48.4% to 16.7%. At the end of the storage period, the fungus kept 34.5% mean viability for the average of cultivars. Fungicides with the active principle fluazinam, carboxin and fludioxonil provided greater control of Alternaria sp.
A exigência nutricional na cultura da framboeseira difere entre a fase de estabelecimento e a fase produtiva, principalmente para as cultivares não reflorescentes que apenas apresentam crescimento vegetativo no primeiro ano. O objetivo deste trabalho foi avaliar a resposta à aplicação de nitrogênio na framboeseira Tulameen quanto ao desenvolvimento inicial das plantas. O experimento foi realizado no ano de 2012 na área experimental do Campus da Universidade de Caxias do Sul localizado em Vacaria, RS, sobre um Latossolo Bruno. Os tratamentos consistiram da aplicação de seis doses de N (0, 40, 80, 120, 160 e 200 kg ha-1), aplicados em dez parcelas ao longo do ciclo da cultura. Utilizou-se o delineamento de blocos ao acaso, com quatro repetições. Foram avaliadas as variáveis: índice de área foliar (IAF), número e diâmetro médio de hastes e a concentração de nutrientes em tecido foliar. A adubação nitrogenada não influenciou o número e nem o diâmetro médio das hastes, mas aumentou o IAF da cultura. As concentrações de nutrientes em tecido foliar da framboeseira não foram influenciadas pela aplicação de nitrogênio, exceto para os teores de cálcio e cobre.
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