Fungicidas cúpricos, cloretos de benzalcônio e composto bioativo liquído (Bokashi): fitotoxicidade e controle da seca dos ponteiros causada por Erwinia psidii em goiabeiras

Rezende, Adriana Magali de Freitas Alves; Tomita, Celso Katsuhiro; Uesugi, Carlos Hidemi

doi:10.1590/s1982-56762008000400005

Cited by 15 publications

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“…Each organic fungicide was sprayed five times alternatively with copper oxychloride (2400 mgL -1 ) at biweekly intervals after the disease was first detected. However, copper fungicide was sprayed only at the initial fruiting stage, when fruits were smaller than two cm in diameter, to avoid injuries to larger fruits (13,25). Treatments stopped at the end of the susceptible phase, when fruits reached approximately four cm in diameter (26).…”

Section: Methodsmentioning

confidence: 99%

Guava fruit loss caused by rust

2014

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107The aim of this paper was to estimate the loss caused by rust (Puccinia psidii) to 'Paluma' guava production in orchards located in Rio de Janeiro State. The disease intensity on the reproductive organs of plants was observed during two chemical control experiments carried out in 2003 and 2004. The loss was estimated based on simple linear regression and the production reduction (fruit number and weight ha -1 ) on the incidence of diseased buds and fruits. In the first experiment, no relationship was established between incidence of diseased buds and loss since there was a Martins, M.V.V.; Silveira, S.F.; Maffia, L.A. Guava fruit loss caused by rust. Summa Phytopathologica, v.40, n.2, p.107-113, 2014. Additional keywords: Psidium guajava, Myrtaceae, Puccinia psidiiABSTRACT delay in spraying and the incidence of buds showing rust was high (mean of 47%) at the beginning of flowering. In the second experiment (2003)(2004), spraying occurred at the beginning of the epidemics and there was a linear relationship between incidence of diseased buds and loss, justifying fungicide intervention at this stage. For the fruiting stage, a significant relationship was found between incidence of diseased fruits and loss in both experiments. In the absence of chemical control, rust reduced fruit production by around 90%.

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Section: Methodsmentioning

confidence: 99%

Guava fruit loss caused by rust

2014

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“…Still, the bioactive liquid compound known as biological fertilizer may be applied over the soil or over the culture because it possesses nutritional properties for the plants and it reduces the disease incidence (DELEITO et al, 2005;TOMITA, 2010;REZENDE et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…Traditionally, for the bacterial disease control, it is recommended to pulverize the guava orchard every 15 days with cupric fungicides like cooper oxychloride (REZENDE et al, 2008). However, these products applications may cause phytotoxicity on the leaves and on the fruits (PICCININ et al, 2005;MARTINS et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…However, these products applications may cause phytotoxicity on the leaves and on the fruits (PICCININ et al, 2005;MARTINS et al, 2012). The liquid bioactive compound may be applied over the soil or over the plant and it has nutritional properties for the plants and it reduces diseases (REZENDE et al, 2008). Other techniques like aeration pruning, may contribute with the reduction of diseases on guava tree (IDE; MARTELLETO, 2008;MARTINS et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…This way, the soil organic matter has a direct correlation with the soil cationic exchange capacity. Consequently the green fertilization use, dead coverage or vegetal, organic fertilization by composting and liquid fertilization or with bioactive compounds; may be one of the instruments to recover the soil and leaf surface biodiversity vitality (HALFELD-VIEIRA et al, 2008;2015;TOMITA 2010;PANE et al, 2012;REZENDE et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Pruning Time in Two Production Systems in the Guava Tree Bacterial Blight Control

et al. 2016

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-In this work, two cultural production systems were compared [conventional (CO) and organic (OR)], and its effects in the guava trees (Psidium guajava) bacterial blight (Erwinia psidii) control. The experimental design was in radomized blocks, in split-split-plot arrangement, where it was measured the bacterial disease and the fruits production on the 2005/06, 2006/07 and 2007/08 harvests. Four pruning seasons effects were evaluated on the harvests (September, December, March and June) in both production systems. Such systems were constituted of: OR -treatment with bioactive compound (BC), liquid BC and dead coverage, and; CO -chemical fertilization, fungicide and herbicide. In 2007/08, the area under the disease progress curve (AUDPC) of all the treatments in the OR system was lower (~54-107) than the CO one(~233-298). In the 2007/08 harvest the number of fruits for each plant for all the OR treatments was higher (~146-204) than the CO ones (~57-103). In all the harvests, considering all the treatments within each system, there was a significantly lower AUDPC (~93-184) and higher fruits production (~158-188) in the OR one than the CO one (AUDPC: ~208-476; fruits ~18-104). The pruning induced a higher AUDPC and lower fruits production in both production sytems. Index terms: Erwinia psidii, Psidium guajava, pruning time. ÉPOCAS DA PODA EM DOIS SISTEMAS DE PRODUÇÃONO CONTROLE DA SECA BACTERIANA DA GOIABEIRA RESUMO -Foram comparados dois sistemas de produção cultural (orgânico = OR; convencional = CO) e seus efeitos no controle da seca dos ponteiros (Erwinia psidii) da goiabeira (Psidium guajava). O delineamento experimental foi o de blocos casualizados, em arranjo de parcelas subsubdivididas, onde foram mensuradas a bacteriose e a produção de frutos nas safras de 2005/2006, 2006/2007 e 2007/2008. Nas safras, foram avaliados os efeitos das quatro épocas de poda (setembro, dezembro, março e junho) em ambos os sistemas de produção. Tais sistemas constituíram-se de: OR -tratamentos com composto bioativo (CB), CB líquido e cobertura morta; e CO -adubação química, fungicida e herbicida. Em 2007/2008, a Área Abaixo da Curva de Progresso da Doença (AACPD) de todos os tratamentos no sistema OR foi menor (~54-107) que em CO (~233-298). Na safra de 2007/2008 o número de frutos por planta para todos os tratamentos em OR foi maior (~146-204) do que aqueles em CO (~57-103). Em todas as safras, considerando todos os tratamentos dentro de cada sistema, houve significativamente menor AACPD (~93-184) e maior produção de frutos (~158-188) em OR do que em CO (AACPD: ~208-476; frutos: ~81-104). Poda induziu maior AACPD e menor produção de frutos em ambos os sistemas de produção. Termos para indexação: Erwinia psidii; Psidium guajava; época de poda. 1 (Paper 099-15).

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Production, Cost Analysis, and Marketing of Agricultural Effective Microorganisms

Murugan¹,

Vivekanandhan²,

Kannan³

2022

Microorganisms for Sustainability

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Fungicidas cúpricos, cloretos de benzalcônio e composto bioativo liquído (Bokashi): fitotoxicidade e controle da seca dos ponteiros causada por Erwinia psidii em goiabeiras

Abstract: RESUMOPalavras-chave: . ABSTRACT Cupric fungicides, benzalconium chlorides and liquid bioactive compost (Bokashi): phytotoxicity and control of guava bacterial blight caused by Erwinia psidii

Cited by 15 publications

References 0 publications

Guava fruit loss caused by rust

Guava fruit loss caused by rust

Pruning Time in Two Production Systems in the Guava Tree Bacterial Blight Control

Production, Cost Analysis, and Marketing of Agricultural Effective Microorganisms

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