Evaluation De L’efficacité De Fongicides Au Laboratoire Contre Corynespora Cassiicola, Agent Causal De La Maladie « Corynespora Leaf Fall » De L’hévéa En Côte d’Ivoire

Corynespora leaf fall disease (CLFD) caused by Corynespora cassiicola is increasingly a major problem for the development of rubber production in Côte d'Ivoire. In the search for solutions to this problem, the efficacy of 11 fungicides (Azoxystrobin, Carbendazime + Chlorothalonil, Carbendazime, Chlorothalonil, Difenoconazole, Fosetyl-Aluminum, Iprodione, Mancozeb, Metalaxyl + Copper Oxide, Pyraclostrobin + Fenpropimorph, Triadimefon) was laboratory tested against an isolate of C. cassiicola. The results of this test showed a high level of efficacy of four fungicides, Iprodione, Carbendazime + Chlorothalonil, Carbendazim and Pyraclostrobin + Fenpropimorph. The use of these four fungicides formulations in mature plantation would be well indicated, to overcome this foliar pathology

Antifungal effect of the cumulative application of biostimulant and fertilizers on young cocoa fruits rot at Tafissou site, Centre-East of Côte d'Ivoire

The use of biostimulants as an alternative way to chemical, often toxic, remains one of the best approaches to control cocoa black pod disease caused by Phytophthora spp. This study has been carried out to evaluate the effect of biostimulant’s applications number and the cumulative action in case of applying previously fertilizers. The experimental design consisted of a Fischer block with six treatments (T01, T02, T1, T2, T3 and T4) and repeated three times. This design was replicated on two sites, one with previous fertilizer (DAE) and the other without previous fertilizer (DSE). Observations were made monthly on each test tree. The biostimulant Banzai was applied for 3 or 4 consecutive months depending on the treatment at each site. The data collected included the total number of cherelles produced and the number of rotten cherelles. From these, data were deduced the rates of healthy cherelles on which the Kruskal-Wallis test was applied to compare treatments between them and between sites. The results showed that four applications of the biostimulant with fertilizer provided better control than three applications without fertilizer. The results also showed that the majority of treatments at the DAE site were more effective than treatments at the DSE site. In conclusion, four applications Banzai coupled with fertilizer have achieved the best rates of healthy cherelles whatever the site. Regarding the cumulative effect of the previous fertilizer with Banzai, treatments of the site with the previous fertilizer were still better than the treatment site without fertilizer

Contrôle des nématodes à galles de la tomate par le Ricin et la bouse de vache

La galle de la tomate, occasionnée par Meloidogyne incognita, est un fléau du maraîcher en Côte d’Ivoire. Cette étude est une contribution à l’amélioration de la production des petits producteurs par la recherche de méthodes simples et replicables. Pour se faire, un sol infesté par M. incognita a été traité par un extrait de ricin, de la bouse de vache et un nématicide (carbofuran), seuls ou combinés. Les traitements ont réduit par rapport au témoin (sans traitement) les galles et les symptômes foliaires des plants de tomate après 45 j. Les traitements bouse de vache + nématicide et ricin + bouse de vache ont été les plus efficace avec une incidence quasiment égale à 0%. par ailleurs, outre son action nématicide, le ricin pourrait promouvoir la croissance des plants de tomate. Mots clés: Tomate, Meloidogyne incognita, extrait de ricin, bouse de vache, carbofuran, incidence.  Root-knot of tomato plants, caused by Meloidogyne incognita, is one of the most important diseases of vegetables in Ivory Coast. This study is a contribution to improving the production of small producers by seeking simple and replicable methods. To do so, soil infested by M. incognita was treated with ricin extract, cow dung and nematicide (carbofuran), alone or in combination. The treatments reduced galls and tomato plants leaf symptoms after 45 days, compared to the control (no treatment). The treatments with cow dung + nematicide and ricin extract + nematicide were most effective (disease incidence = 0 %). Furthermore, in addition to its nematicidal action, the ricin extract has a promoting action of tomato plants growth.  Keywords: Meloidogyne incognita, tomato plants, ricin extract, cow dung, nematicide, effective

Jaunissement Mortel du Cocotier et Mutations Sociales à Grand-Lahou, Côte d’Ivoire

Coconut farming is an important part of the Ivorian economy and governs the lives of people who grow it. However, the Lethal Yellowing Disease (LYD), occurring in the Ivoirian plantations of Grand-Lahou has undermined the foundations of the social economy and the social dynamics by their perverse effects. In order to identify the social implications of the fatal yellowing of the coconut tree, a study was conducted in ten villages in GrandLahou subject to this epidemic. The collection of quantitative data was carried out among 101 people determined by quota sampling. Qualitative survey was conducted among 10 women and 10 men all involved in the production and processing of coconut. For data managment, S.P.S.S for quantitative data and MaxQDA for qualitative data were used. The results attest to the respondents' sufficient life experience to appreciate the impact of the LYD. The consequences of the Lethal Yellowing Disease relate to the disruption of the traditional customary designation system (81.8%), the lack of local development resulting from the loss of income (15.8%) and areas of plantation plantations (83.2%), the relaxation of intergenerational relations between seniors and cadets. Despite its weak impact on polygamy as a cultural construct, the LYD participates in the transformation of gender relations which promote women's access to land and their autonomy. Ultimately, the JMC is presented as a social fact participating in the development of women but laying the foundation for a weakening of the collective consciousness.La culture du coco constitue un pan important de l’économie ivoirienne et régente la vie des populations qui la cultivent. Cependant le jaunissement mortel du cocotier (JMC), intervenu dans les plantations ivoiriennes de Grand-Lahou a sapé les fondements de l’économie sociale et la dynamique sociale par leurs effets pervers. Afin de cerner les implications sociales du jaunissement mortel du cocotier, une étude a été conduite dans une dizaine de villages de Grand-Lahou sujets à cette épidémie. La collecte de données quantitatives a été effectuée auprès de 101 personnes déterminées par l’échantillonnage par quotas. Celles qualitatives ont été réalisées auprès de 10 femmes et 10 hommes tous impliqués dans la production et la transformation de la noix de coco. Pour le traitement et l’analyse des données quantitatives, il a été mobilisé le logiciel Statistical Package for Social Sciences (S.P.S.S) tandis que l’usage de MaxQDA a été fait pour les données qualitatives. Les résultats attestent d’une espérance de vie suffisante des répondants pour apprécier l’impact du JMC. Les implications du jaunissement mortel du cocotier portent sur le bouleversement du système traditionnel de désignation de l’autorité coutumière (81,8%), l’absence de développement locale conséquence de la perte de revenus (15,8%) et des superficies de cocoteraies (83,2%), ainsi que le relâchement des relations intergénérationnelles aînéscadets. Malgré son faible impact sur la polygamie comme construit culturel, le JMC participe à la transformation des relations de genre favorisant l’accès de la femme à la terre et son autonomie. En définitive, le JMC se présente comme un fait social participant à l’essor de la femme mais jetant les jalons d’un affaiblissement de la conscience collective

First report of a phytoplasma affecting cassava orchards in Cote d'Ivoire

Annex 46 of 48 for CIFSRF-IDRC/GAC Final technical report: http://hdl.handle.net/10625/56415This work was carried out with the aid of a grant from Canada’s International Development Research Centre (IDRC), and with financial support from the Government of Canada, provided through Global Affairs Canada (GAC)This is the first report of a phytoplasma affecting cassava in Côte d'Ivoire. The findings suggest that cassava may be a potential alternative host for the Côte d'Ivoire lethal yellowing (CILY) phytoplasma, which poses a serious threat for the food security of smallholder coconut and cassava farmers, especially women, in Grand-Lahou, Côte d’Ivoire. Leaf samples were collected at random from 12 symptom-bearing and two symptomless cassava plants from two villages. Illustrations/ figures depict the symptoms of yellowing. Cassava (Manihot esculenta) is one of the staple foods in Africa, cultivated in 40 countries and producing more than three million tonnes per year

Field schools and plant clinics : effective agricultural extension approaches to fight the coconut lethal yellowing disease and improve livelihoods of smallholder farmers in Grand-Lahou, Côte d’Ivoire

Annex 19 of 48 for CIFSRF-IDRC/GAC Final technical reportThis work was carried out with the aid of a grant from Canada’s International Development Research Centre (IDRC), and with financial support from the Government of Canada, provided through Global Affairs Canada (GAC)Field schools and plant clinics are key extension tools to fight Côte d’Ivoire lethal yellowing disease (CILY) that severely impacts the livelihoods of thousands of smallholder farmers in Grand-lahou, Côte d’Ivoire. This paper describes the processes in establishing and organizing field schools, plant clinics, Women Coconut Fairs and Women Groups in CILY-affected villages of GrandLahou. Land acquisition is one of the main issues that affect women within the coconut value chain in Grand-Lahou: women are denied access and control over farmland, and work at their husband’s plantations

Helping coconut farmers fight Lethal Yellowing disease : project profile

Library has French version: Assistance aux producteurs de noix de coco qui luttent contre le jaunissement mortel du cocotier : profil de projetThis work was carried out with the aid of a grant from Canada’s International Development Research Centre (IDRC), and with financial support from the Government of Canada, provided through Global Affairs Canada (GAC)This project is developing new strategies to help farmers control Côte d’Ivoire Lethal Yellowing disease (CILY). Without urgent action, the disease will decimate coconut crops by 2020. CILY is associated with phytoplasmas, insect-transmitted organisms that devastate various crops worldwide. Through field schools, plant clinics, and workshops, the research team will transmit innovations to farmers, government organizations, coconut processors, and business groups. Training and support for women will help them protect their crops and strengthen their role in coconut production and processing

Assistance aux producteurs de noix de coco qui luttent contre le jaunissement mortel du cocotier : profil de projet

Version anglaise dans la bibliothèque: Helping coconut farmers fight Lethal Yellowing disease : project profileThis work was carried out with the aid of a grant from Canada’s International Development Research Centre (IDRC), and with financial support from the Government of Canada, provided through Global Affairs Canada (GAC)Des chercheurs ivoiriens et canadiens tentent de trouver des façons de réduire les pertes de noix de coco attribuables au jaunissement mortel du cocotier, une maladie qui fait des ravages dans les plantations de l’Afrique de l’Ouest. Une meilleure compréhension de la maladie, la sélection des variétés et le remplacement des cocotiers perdus aideront à préserver les moyens de subsistance des producteurs de noix de coco de la Côte d’Ivoire

Detection and differentiation of the coconut lethal yellowing phytoplasma in coconut-growing villages of Grand-Lahou, Côte d’Ivoire

Annex 2 of 48 for CIFSRF-IDRC/GAC Final technical reportThis work was carried out with the aid of a grant from Canada’s International Development Research Centre (IDRC), and with financial support from the Government of Canada, provided through Global Affairs Canada (GAC)The Côte d’Ivoire Lethal Yellowing (CILY) disease is associated with a Lethal Decline (LD) phytoplasma, plant pathogenic bacteria transmitted by insect vectors of the Hemiptera order. This detailed paper is part of a larger study “Fighting lethal yellowing disease for coconut farmers (CIFSRF Phase 2)” and was carried out with surveys in eight coconut-growing villages of Grand-Lahou to assess the differential detection of the CILY phytoplasma in the stem, inflorescences and leaves of affected palms, as well as to render a phylogenetic analysis. Disease stages one, two and three were present throughout all the coconut plantations of the surveyed villages

CIFSRF final technical report : Fighting lethal yellowing disease for coconut farmers (CIFSRF Phase 2)

Annexes cataloged separatelyThis work was carried out with the aid of a grant from Canada’s International Development Research Centre (IDRC), and with financial support from the Government of Canada, provided through Global Affairs Canada (GAC)Côte d'Ivoire lethal yellowing (CILY) has impacted farmers' family nutrition and limited women’s income in Grand-Lahou. It was anticipated that CILY would decimate the Ivorian coconut grove by 2020 if prompt actions were not taken. Therefore, the general objective of the research was to provide and communicate new needed information to allow authorities, policy makers, stakeholders and farmers to better control CILY. The overall progress of project implementation and outcomes contributed to provide that information, which became innovative knowledge contributions and gender-responsive solutions to engage famers, stakeholders and policy makers in addressing the disease problem