English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Visando avaliar a eficiência de quatro fungicidas no controle monitorado da mancha preta (Cercosporidium personatum) e verrugose (Sphaceloma arachidis) do amendoim (Arachis hypogaea), cv.'Tatu', foram conduzidos quatro ensaios em Ribeirão Preto e Pindorama, SP (1996 e 1997. Os tratamentos foram: testemunha, sem controle químico; controle convencional, com quatro pulverizações de clorotalonil, a cada l4 dias, iniciando entre 41 e 43 dias do plantio; e controle monitorado, com clorotalonil e os triazóis tebuconazole, difenoconazole e propiconazole, nas doses recomendadas pelos fabricantes para a cultura. No controle monitorado a primeira pulverização foi realizada quando a incidência da mancha preta foi de 5 a 15% e as demais, com o intervalo mínimo de 14 dias entre as aplicações, após três dias, seguidos ou não, com ocorrências de precipitações pluviais superiores a 2,5 mm, durante períodos de sete dias. A intensidade da mancha preta (área sob a curva de progresso da doença) foi obtida por avaliações semanais com escalas diagramáticas de índice de área foliar infetada, durante o ciclo da cultura. A severidade da verrugose foi avaliada aos 84-92 dias do plantio, com escala específica de notas de um a quatro, em função dos sintomas exibidos nas hastes e pecíolos. No controle monitorado houve redução de uma a três pulverizações e os triazóis foram mais eficientes que o clorotalonil, resultando em rendimentos próximos aos do tratamento com quatro pulverizações fixas. O tebuconazole propiciou maior redução na intensidade da mancha preta, enquanto que o difenoconazole destacou-se pela eficiência no controle da verrugose. Four field trials were carried out in Ribeirão Preto and Pindorama, SP, Brazil (1996 and 1997) to evaluate the efficiency of fungicides in the control of late leaf spot (Cercosporidium personatum) and scab (Sphaceloma arachidis) in peanut (Arachis hypogaea), cultivar Tatu. The treatments consisted of: control, not sprayed; conventional control, with four sprayings of chlorothalonyl at 14-day intervals, starting at 41 to 43 days after planting; monitored control with chlorothalonyl, tebuconazole, difenoconazole and propiconazole, respectively, in the recommended dosages for the peanut crop. Monitoring consisted of doing the first spraying when 5 to 15% of the leaflets were infected by the late leaf spot and, the following sprayings, at a minimum of 14-day intervals between applications, after three days, consecutive or not, in which rain precipitations greater than 2.5 mm were registered, in periods of seven days. Late leaf spot severity was assessed at weekly intervals during the growing season with diagrammatic scales of infected leaf area. Scab severity was evaluated at 84-92 days after planting with a specific scale of notes, ranging from one to four, according to the symptoms exhibited in stems and petioles. The results showed that in the monitored control, where the number of sprayings was reduced to one to three, the triazole fungicides were more efficient than chlorothalonyl, resulting in pod yields close to the treatment where four fixed sprayings were made. Tebuconazole promoted the highest reductions in late leaf spot intensity and, difenoconazole showed outstanding efficiency in the control of scab

Eficiência de fungicidas no controle da mancha preta e verrugose do amendoim por método de monitoramento