Cyprodinil, Pyrimethanil, Propineb E Trifloxystrobin No Controle Da Sarna Da Macieira

Berton, Onofre; Mio, Louise Larissa May De; Santos, Hellen Aparecida Arantes dos

doi:10.5380/rsa.v8i2.8366

Cited by 2 publications

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“…There are no reports of experiments with fungicides in Glomerella leaf spot on the literature. Some of these products were tested to control apple scab: cyprodinil pyrimethanil, propineb and trifloxyztrobin (BERTON et al, 2007); the effect of the fungicides was not evidenced for systemic compounds and neither phytotoxicity over spurs and leaves nor russeting on fruits were observed after ten fungicide sprays. The results presented in this paper can help the producers and researches assess and control the disease, but continuous development of strategies of control and epidemiological studies are still a great concerning to the integrated management of this disease.…”

Section: Resultsmentioning

confidence: 99%

Glomerella leaf spot in apple: validation of proposed diagrammatic scale and efficiency of fungicides

et al. 2010

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A diagrammatic scale to assess Glomerella leaf spot severity (Colletotrichum spp) (30, 37.5, 45); propineb (140) e mancozeb (160) + tebuconazole (12.50), and a control (no spray). The incidence and severity in leaves; number of fruits, weight and incidence in fruit (harvest) and defoliation (after harvest) were evaluated. The proposed scale showed the levels of 0.08; 0.28; 0.99; 3.45; 11.23 RESUMO Neste estudo, foi desenvolvida uma escala diagramática para avaliação da mancha das folhas da macieira (Colletotrichum spp) e testada em experimento de controle químico. Folhas de macieira com diferentes níveis de severidade foram coletadas (Campo Largo-PR) para determinação dos limites mínimos e máximos. Os níveis intermediários foram obtidos pela "lei do estímulo visual de Weber-Fechner". A escala foi validada por quatro avaliadores, estimando a severidade em 100 folhas, com e sem uso da escala. Os tratamentos e as dosagens (g 100 L -1 de água) utilizados foram: ciprodinil (15); pirimetanil (30); (37,5); (45); propinebe (140) e mancozebe (160) + tebuconazole (12,5) em quatro blocos ao acaso contendo 10 plantas. Foram avaliadas a incidência e severidade em folhas, a desfolha em pós-colheita e o número de frutos, o peso e a incidência da doença em frutos (colheita).A escala proposta apresentou os níveis de 0,08; 0,28; 0,99; 3,45; 11,23 e 30,93%, sendo

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Section: Resultsmentioning

confidence: 99%

Glomerella leaf spot in apple: validation of proposed diagrammatic scale and efficiency of fungicides

et al. 2010

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“…Thus, it is important to test and evaluate a disease forecasting system based on environmental conditions. Forecasting systems have been used in Brazil for the crops of apple (Berton, 2004), potato (Trentin et al, 2009;Bosco et al, 2010;Grimm et al, 2011) and grape (Shimano & Sentelhas, 2013), showing some advantages, such as the decrease in the risk of epidemics, reduction in the number of sprayings, higher income to the farmer and less damage to humans and the environment (Bosco et al, 2010;Grimm et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Irrigation and fungicide application on disease occurrence and yield of early and late sown sunflower

Maldaner

Heldwein

Bortoluzzi

et al. 2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe objective of this study was to evaluate the effect of irrigation and fungicide application on the occurrence of diseases and cypsela yield of two genotypes of sunflower. The experiments were carried out in Santa Maria-RS, during the regular season in 2007 and the late season, in 2008. Plants were sown on 04/09/2007 and 21/01/2008, in a completely randomized design, with four replicates. A 2 x 6 factorial scheme was used, with the sunflower genotypes Aguará 03 and Hélio 358 and six fungicide application schemes, which were determined by the FAST forecasting system, as follows: FAST 16, FAST 22 and FAST 28, without irrigation, FAST 16 IRR under irrigated condition, in addition to irrigated control (CONTROL IRR) and control (CONTROL). Disease progress was analyzed based on weekly observations of the severity of the symptoms. It was verified that irrigation increases sunflower cypsela yield in the regular season, provided that weather conditions are not favorable for the occurrence of alternaria and septoria leaf blights or that fungicides are applied. In the late season, under irrigated condition, fungicide application is necessary to control alternaria and septoria leaf blights.Irrigação e aplicação de fungicidas na ocorrência de doenças e na produtividade do girassol em períodos de safra e safrinha R E S U M O Objetivou-se, neste trabalho, avaliar o efeito da irrigação e da aplicação de fungicidas na ocorrência de doenças e na produtividade de cipselas de dois genótipos de girassol. Os experimentos foram conduzidos em Santa Maria, RS, nos períodos de safra de 2007 e safrinha de 2008. As semeaduras foram realizadas em 04/09/2007 e 21/01/2008, sendo utilizado o delineamento inteiramente casualizado, com quatro repetições. Foi utilizado um esquema fatorial 2 x 6, constituído pelos genótipos de girassol Aguará 03 e Hélio 358 e seis esquemas de aplicação de fungicida, determinados em função do sistema de previsão FAST, os quais foram: FAST 16, FAST 22 e FAST 28, sem irrigação, FAST 16 IRR, em condição irrigada, além das testemunhas irrigada (TEST IRR) e não irrigada (TEST). O progresso da doença foi analisado com base nas observações semanais da severidade dos sintomas da doença. Verificou-se que a irrigação aumenta a produtividade de cipselas de girassol no cultivo de safra desde que as condições meteorológicas não sejam favoráveis para a ocorrência de mancha de alternaria e septoria ou que se apliquem fungicidas. Na safrinha em condição irrigada, a aplicação de fungicidas é necessária para o controle de mancha de alternaria e septória.

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Cyprodinil, Pyrimethanil, Propineb E Trifloxystrobin No Controle Da Sarna Da Macieira

Cited by 2 publications

References 1 publication

Glomerella leaf spot in apple: validation of proposed diagrammatic scale and efficiency of fungicides

Glomerella leaf spot in apple: validation of proposed diagrammatic scale and efficiency of fungicides

Irrigation and fungicide application on disease occurrence and yield of early and late sown sunflower

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