Responses of Compact Coffee Clones Against Coffee Berry and Coffee Leaf Rust Diseases in Tanzania

Kilambo, D. L.; Rebeun, Shazia O. W. M.; Mamiro, D. P.

doi:10.5539/jps.v2n2p81

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…Chemical control represents an environmental hazard and a social concern (organic coffee is increasingly valued; Ibañez and Blackman, ), as well as an economic burden. For instance, in Tanzania, 50% of the coffee cultivation production costs can be attributed to the chemical control of the two main fungal diseases, CLR and coffee berry disease (Kilambo et al ., ). Preventative treatments are typically carried out with copper‐based fungicides, whereas curative treatments are conducted with systemic fungicides (e.g.…”

Section: Disease Controlmentioning

confidence: 97%

The coffee leaf rust pathogen Hemileia vastatrix: one and a half centuries around the tropics

Talhinhas

Batista

Diniz

et al. 2017

Molecular Plant Pathology

199

191

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Although exhibiting limited genetic polymorphism, the very large genome of H. vastatrix (c. 797 Mbp) conceals great pathological diversity, with more than 50 physiological races. Gene expression studies have revealed a very precocious activation of signalling pathways and production of putative effectors, suggesting that the plant-fungus dialogue starts as early as at the germ tube stage, and have provided clues for the identification of avr genes.

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Section: Disease Controlmentioning

confidence: 97%

The coffee leaf rust pathogen Hemileia vastatrix: one and a half centuries around the tropics

Talhinhas

Batista

Diniz

et al. 2017

Molecular Plant Pathology

199

191

View full text Add to dashboard Cite

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Assessment of Factors Causing Coffee Yield Gap Among Smallholder Farmers in Mbinga and Mbozi Districts

Kiwelu¹,

Philip

Mpenda

2021

Preprint

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This study assesses the factors causing coffee yield gap among smallholder in the study area. The aim of this study is to increase coffee productivity from the current level. The primary data were collected from 218 adopters and 102 non-adopters of improved coffee varieties using a structured questionnaire. The descriptive statistics was used to assess yield gap and linear regression model was used to determine factors causing yield gap among smallholder farmers in the study area. The findings showed that the yield potential (3000 kg/ha and 1000 kg/ha) for improved and traditional coffee varieties respectively has not yet been realized by farmers and there is a large gap between the average coffee yield (1141 kg/ha and 384 kg/ha) gained by smallholder farmers growing improved coffee varieties and farmer growing traditional coffee varieties respectively. The yield gap from smallholder farmers with improved coffee varieties was 2000 kg/ha and 646 kg/ha from traditional coffee varieties. The main factors causing coffee yield gap were lack of access to extension services (p < 0.000), plant population (0.007), low use of fertilizer (p < 0.002), coffee diseases (p < 0.008). To minimize coffee yield gap in Tanzania promotion of the use of improved coffee varieties, fertilizer and agro-inputs is important.

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Resistencia genética a la Enfermedad de la Cereza del Café en variedades cultivadas en Colombia.

Maldonado¹,

Ángel-Giraldo²

2020

Rev. Cenicafé

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La enfermedad de las cerezas del café (CBD), antracnosis causada por el hongo Colletotrichum kahawae subsp. kahawae, ha sido registrada solo en África y puede ocasionar pérdidas de producción hasta del 80%. Cenicafé desarrolla variedades resistentes a las enfermedades más limitantes para el cultivo, aún en ausencia de los patógenos en Colombia, usando al Híbrido de Timor (HT) como la principal fuente de resistencia a la roya del cafeto y a CBD. El propósito de este estudio fue conocer la presencia del gen Ck-1 de resistencia a CBD en las principales variedades de café cultivadas en Colombia, establecer la correlación entre la presencia de Ck-1 y la respuesta a inoculación de hipocótilos y explorar las bases genómicas de la resistencia. Los marcadores moleculares ligados a Ck-1 se ubicaron en el cromosoma 1 de Coffea canephora, región genómica con quince genes de resistencia a enfermedades. Se encontraron marcadores para Ck-1 en todas las líneas mejoradas derivadas del HT-1343 y ausentes en las variedades Típica, Borbón y Caturra, y en líneas derivadas del HT-832/1. No hubo correlación entre las formas alélicas de resistencia a CBD y la resistencia medida por inoculación de hipocótilos. La alta frecuencia de formas alélicas asociadas con resistencia a CBD en materiales seleccionados por resistencia a roya sugiere cosegregación de genes de resistencia para ambas enfermedades. La estrategia de variedades multilínea desarrolladas por Cenicafé, que actualmente corresponde a cerca del 80% del café sembrado en el país, hace que la población en general esté protegida ante la eventual llegada del patógeno a Colombia.

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Responses of Compact Coffee Clones Against Coffee Berry and Coffee Leaf Rust Diseases in Tanzania

Cited by 3 publications

References 21 publications

The coffee leaf rust pathogen Hemileia vastatrix: one and a half centuries around the tropics

The coffee leaf rust pathogen Hemileia vastatrix: one and a half centuries around the tropics

Assessment of Factors Causing Coffee Yield Gap Among Smallholder Farmers in Mbinga and Mbozi Districts

Resistencia genética a la Enfermedad de la Cereza del Café en variedades cultivadas en Colombia.

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