Incidência de pragas e doenças em agroecossistemas de café orgânico de agricultores familiares em Poço Fundo-MG

Martins, Márcia; Mendes, Antônio Nazareno Guimarães; Alvarenga, Maria Inês Nogueira

doi:10.1590/s1413-70542004000600012

Cited by 15 publications

(9 citation statements)

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“…The disease can cause a 35-50 per cent yield reduction, if no control action is taken (Silva et al 2006). These losses are due to the formation of pustules on leaves, which reduce the photosynthetic area and lead to early leaf fall and drying of branches (Martins et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Manganese Phosphite in Coffee Defence against Hemileia vastatrix, the Coffee Rust Fungus: Biochemical and Molecular Analyses

Monteiro

Resende

Valente

et al. 2016

Journal of Phytopathology

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Phosphites (Phi) are inorganic salts of phosphorous acid that have been used as resistance elicitors to activate mechanisms underlying plant defence. This study assessed the effectiveness of manganese phosphite (MnPhi) for the management of rust (Hemileia vastatrix) on coffee seedlings. The effect of this compound on the induction of resistance was also measured by the expression of defence‐related genes such as POX (peroxidase), CAT (catalase), GLU (β‐1.3‐glucanase) and PAL (phenylalanine ammonia‐lyase) and by the activity of defence enzymes such as ascorbate peroxidase (APX), superoxide dismutase (SOD) and polyphenol oxidase (PPO). Foliar sprayings of MnPhi on coffee seedlings provided 63% control of rust severity. This compound induced defence responses in seedlings with increased transcription of genes POX, CAT, GLU and PAL in non‐inoculated plants and increased activity of APX, SOD and PPO enzymes in plants inoculated with H. vastatrix and in non‐inoculated plants. It is suggested that MnPhi can induce resistance in coffee seedlings.

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Section: Introductionmentioning

confidence: 99%

Manganese Phosphite in Coffee Defence against Hemileia vastatrix, the Coffee Rust Fungus: Biochemical and Molecular Analyses

Monteiro

Resende

Valente

et al. 2016

Journal of Phytopathology

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“…It is hard to conclude which factors were responsible for high values of BES intensity in field cultivation but in the present study shade seemed to be more important for BES control than fungicide–nutrient treatment. A lower disease intensity could be expected under the CS as a result of intensive fungicide usage (Holb et al ., ); however, the nutritional status of the OS was considered to be more balanced (Martins et al ., ). The present study consisted of four production cycles, and the results showed that the intensity of BES was higher in the CS, despite plants being sprayed five times with the fungicide–nutrient formulation Calda Viçosa in the CS and only twice in the OS.…”

Section: Discussionmentioning

confidence: 97%

“…Taking into account the fact that the CS received more fungicide–nutrient treatments than the OS and OSS, a lower disease intensity would be expected in the CS system. Previous studies reported similar results (Samayoa & Sanchez, ; Santos et al ., ), although there are other reports that disease intensity was higher in organic systems for Minas Gerais State (Martins et al ., ) and Malawi (Phiri et al ., ). It is hard to conclude which factors were responsible for high values of BES intensity in field cultivation but in the present study shade seemed to be more important for BES control than fungicide–nutrient treatment.…”

Section: Discussionmentioning

confidence: 99%

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A time series analysis of brown eye spot progress in conventional and organic coffee production systems

et al. 2014

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Brown eye spot (BES), caused by Cercospora coffeicola, is an important coffee disease in Brazil. Losses related to this disease have increased over the last few years. Because the factors associated with the disease dynamics are not fully understood, it is important to gather information about this in different cropping systems. BES epidemics were compared from three production systems: organic (OS), organic under shade (OSS) and conventional under full sun (CS). This study was conducted in Ervália‐MG, Brazil, from November 2004 to October 2008. Disease progress was modelled with all 4 years of data in a time series analysis. Disease intensity (severity (SEV) and incidence (INC)), leaf setting (LS) and leaf fall (LF) were assessed on a monthly basis. The highest values for SEV, INC, LF, LS, as well as a larger area under the disease progress curve and maximum disease occurred in CS and in the upper branches, whereas the lowest values for all variables occurred in OSS and in the lower branches. The highest values occurred for SEV and INC from May to July, for LF from July to September, and for LS from October to January. The disease progress was successfully modelled via a time series analysis. The seasonal behaviour of disease progress for all years and production systems was modelled with a nonlinear sinusoidal model with autoregressive moving average (ARMA) errors. Estimated parameters were generated which could be useful for comparative epidemiology, and it was shown that shade could be used in the field for BES management.

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“…Na Costa Rica, Samayoa-Juaréz & Sánchez-Garcia (2000) verificaram incidência de cercosporiose e de ferrugem acima de 20 e 40%, respectivamente. Em lavouras de café orgânico em Minas Gerais, Martins et al (2004) registraram incidência de cercosporiose acima de 59%. Relatos como esses são reconhecidos, por técnicos e cafeicultores, como o principal ponto de estrangulamento na produtividade do cafeeiro orgânico.…”

Section: Introductionunclassified

Adubação orgânica, nutrição e progresso de cercosporiose e ferrugem-do-cafeeiro

Santos¹,

Souza

Pozza

et al. 2008

Pesq. agropec. bras.

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suíno e crotalária (testemunha). A maior área abaixo da curva de progresso da incidência da cercosporiose e da ferrugem foi registrada no tratamento PC (respectivamente 62 e 38% superiores à testemunha). O maior progresso das doenças coincidiu com a elevação no teor de K e redução nos teores de Ca foliares no tratamento PC, comparado às demais fontes de adubação, e resultou em maior desfolha e menor produtividade. Os tratamentos PC+TM e PC+CS reduziram a incidência da cercosporiose em 38% e da ferrugem em 31 e 21%, respectivamente, e aumentou o teor de Ca foliar ao final da fase de granação do cafeeiro, em comparação ao tratamento PC. O equilíbrio nutricional desses cafeeiros conferiulhes maior resistência e reduziu o efeito da bienalidade nas Organic fertilization, nutrition and the progress of brown eye spot and rust in coffee treesAbstract -The objective of this work was to evaluate the effect of organic nutrional sources on the progress of brown eye spot and coffee rust in coffee plants, between November 2003 and November 2005. The experimental design adopted was the randomized blocks, with four replications and six treatment plots: coffee fruit peel + swine waste (CP+SW); castor bean presscake + crotalaria (CBP+Cr); coffee fruit peel (CP); bovine manure + crotalaria (BM+Cr); coffee fruit peel + castor bean presscake (CP+CBP); and standard fertilization used in the farm, which combines compost, castor bean presscake, swine waste and crotalaria (control). The higher area under the incidence progress curves of brown eye spot and coffee rust was obtained by CP treatment (respectively 62 and 38% higher to control). The larger progress coincided with the increase in leaf potassium and decrease of calcium content in CP, compared to other nutrient sources, and it resulted in higher leaf drop and lower yield. CP+CBP and CP+SW reduced in 38% the brown eye spot incidence, and in 31 and 21%, respectively, the coffee rust incidence, and increased leaf calcium content during fruit filling, compared to CP. The better nutritional status of plants increased resistance to diseases and reduced the variation between 2004 and 2005 harvests.

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Incidência de pragas e doenças em agroecossistemas de café orgânico de agricultores familiares em Poço Fundo-MG

Cited by 15 publications

References 0 publications

Manganese Phosphite in Coffee Defence against Hemileia vastatrix, the Coffee Rust Fungus: Biochemical and Molecular Analyses

Manganese Phosphite in Coffee Defence against Hemileia vastatrix, the Coffee Rust Fungus: Biochemical and Molecular Analyses

A time series analysis of brown eye spot progress in conventional and organic coffee production systems

Adubação orgânica, nutrição e progresso de cercosporiose e ferrugem-do-cafeeiro

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