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AGA58 Gabon-Report of the Scientific Conference on African Coffee

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Libreville, Gabon, 20 - 21 November 2018
In preparation for the Annual Meetings of the Inter-African Coffee Organisation (IACO), the Scientific Conference on African Coffee was held from 20 to 21 November 2018 at Hotel Nomad in Libreville, Gabon. It was structured around four sessions.
The first session, moderated by Dr. Christian CILAS of CIRAD Montpellier, France and reported by Mr. Komivi AMETEFE of ITRA, Togo and Keji DADA of CRIN, Nigeria, focused on five papers.
❖ Communication 1: Impact of epidemiological knowledge for better control of coffee diseases: Examples of Coffee Berry Disease (CBD) and Coffee Wilt Disease (CWD)
This presentation was made by Dr. Christian Cilas. In his communication, he gave a brief definition of epidemiology. He then addressed several points, including the objectives of plant epidemiology studies, the spatial dynamics of CBD and CWD, and the effect of shading on the development of these diseases. After the communication, the discussions focused on:
❖ The type of plant used to control these pests;
❖ The search for optimal shade to reduce both anthracnose and coffee berry borer effects;
❖ The specificity of anthracnose in coffee.
Tel: (225) 20 21 61 31/20 21 61 85
Fax: (225) 20 21 62 12
Web Site:
❖ Communication 2: Evaluation of released Arabica coffee varieties for Their Tolerance to Bacterial Blight of Coffee (BBC) at Sidama and Gedeo Zones, Southern Ethiopia
This presentation was made by Demelash Teferi from Ethiopia. In his communication, the speaker briefly presented the disease (causative agent, geographical distribution in Ethiopia, losses and consequences, symptoms and control methods, climatic conditions conducive to infection). He then presented the selected and cultivated Arabica coffee varieties and their origins. After the presentation, the focus was on the resistance of the varieties to the disease and whether or not the disease exists in West Africa.
❖ Communication 3: Status of Major Coffee (Coffea arabica L.) Diseases in Major Coffee Growing Areas of Eastern Ethiopia»
This communication was given by Mohammedsani Amin from Ethiopia, who developed, in his intervention, the objectives of the study, the methodology used, the synthesis of the experimental results and the conclusions and recommendations. According to the results of his study, 4 diseases were detected (CBD, CLR, BDB and CWD) as major diseases, 2 of which are more damaging.
❖ Communication 4: Status of Major Coffee (Coffea arabica L.) insects in Major Coffee Growing Areas of Eastern Ethiopia
This communication was given by Mohammedsani Amin from Ethiopia, who developed, in his intervention, the objectives of the study, the methodology used, the synthesis of the experimental results and the conclusions and recommendations. In the results, he presented the status of insect infestation of Arabica coffee trees, the severity and level of insect damage, the effect of agricultural practices on the status of insect-borne diseases. The focus of this presentation was on the existence of pesticides to control different insects. Following the communication, the following recommendations were made:
❖ Present photos of the different symptoms of diseases and insects for their recognition;
❖ Perform statistical analysis of data to better appreciate differences;
❖ Explain the criteria for determining the age of the plants and choosing plantations;
❖ Present the impacts of the severity and incidence of diseases and insects on plantation yield;
❖ Specify the plants associated with Arabica coffee trees that have caused more insect attacks.
❖ Communication 5: Microsatellite markers screening for coffee berry disease (Colletotrichum kahawae) resistance in progenies of kp423 genotype and ethiopian coffee arabica accessions»
This communication was given by Damian J. Mtenga of Tanzania. He presented the objectives of the study, the materials and methods used, the results obtained, the conclusions and recommendations. Following the presentation, the discussions focused on mastering hybridization methods to obtain hybrids whose identities are well known.
II. Session 2: AGRONOMY
The 2nd session of the Scientific Conference featured the presentation of seven (7) communications. During the presentations, each speaker presented the objectives of his study, the methodology used, the results obtained and the conclusions and recommendations. At the end of each presentation, discussions and debates were held and the key points were retained.
Title of Presentation
Key Points
Effects of cutting position along mother plants on rooting of hybrid coffee varieties (Jeremiah Mtenga, Tanzania)
- The best varieties of coffee to produce in relation to the weight of the callus;
- Evaluation of the costs of producing plant material by embryogenesis compared to the cost of production by the normal method.
Determining the impact of mulching practice on the early survival and subsequent growth performance of newly transplanted coffee seedlings (Mohammedsani Amin, Ethiopia
- The appearance or not of other pests (termites) in the practice of mulching
- The economic profitability of this practice
Coffee peaberry as a seed source for production (Alemseged Yilma, Ethiopia)
- The existence of information on the genetic links that define the characteristics of camberge coffee;
- The yield of plantations from camberge coffee seeds;
- The commercial value of these yields.
Response functions of tall Coffea arabica varieties to N, P and K nutrients in Tanzania (Suzana Gasper Mbwambo, Tanzania)
- The composition of the organic
fertilizers used in the NPK
fertilizer study;
- The risks of mycorrhization due to fertilizing interactions with infectious fungi present in the soil.
Towards expansion Coffea canephora production in Tanzania: The land suitability perspective (Suzana Gasper Mbwambo, Tanzania)
- Tanzania's Arabica coffee export capacity
Characteristics of coffee clones produced and popularised in Togo (Ametefe Komivi Exonam, Togo)
- The possibility of multiplication of clones with high production potential;
- The difference between the characteristics of the clones studied in Togo and their characteristics in their countries of introduction.
Effect of different substrates on the growth and development of coffee cutting (Coffea canephora var Robusta) in nurseries at IRAD Barombi-kang (Baleba Laurent, Cameroon)
- The period from which rooting can be assessed.
Reduction of the effects of the longer dry season on Robusta coffee production (Koudjega Tchimondjro, Togo)
- The number of fertilizer trees per hectare
- The attack of which fertilizer species by plant parasites?
Two presentations were made during this session. The first focused on the "Diversification and identification of agroforests based on Arabica coffee trees (Coffea arabica l.) in the highlands of western Cameroon". In this presentation, the speaker defined the context of the study. He then presented the methodology used and finally concluded with the results obtained.
The second communication dealt with the theme "Seed and in vivo cutting mutagenesis for broadening genetic variability in Coffea Arabica".
The 4th session of the Scientific Conference had three (03) presentations. These communications focused on:
1. Agricultural sectors as drivers of competitiveness clusters: the case of the coffee sector in Côte d'Ivoire (Béma Coulibaly, Côte d'Ivoire)
2. Socio-economic appraisal of the Coffee rehabilitation programme in Ghana (Mercy Asamoah, Ghana)
- Perceptions of climate change and endogenous adaptation strategies of coffee farmers in Togo (Dare Badji Piou, Togo)
After these communications, discussions and debates were held. These debates focused on:
❖ Improving the quality of African coffee through marketing and raising producers' awareness of good agricultural practices;
❖ The effects of coffee consumption on human health;
❖ Procedures for supervising coffee producer groups;
❖ Coffee processing routes (wet or dry).
At the end of the various sessions, the following recommendations were made:
➢ For the attention of IACO:
• Research at the level of the 25-member countries the technologies developed and available on the mitigation of the effects of climate change in coffee growing;
• Compile an inventory of endogenous techniques used by coffee farmers to mitigate the effects of climate change; and
• Have a website open to all researchers where researchers can publish the results of their work.
➢ For the attention of researchers:
• That the questions that were not solved during this conference be research topics for further work; and
• That the technical itineraries be updated in the light of changes in the coffee growing environment in the various producing countries.
It was on these last discussions that the Scientific Conference on African Coffee came to an end.
Libreville, 21st November 2018