Yadom Y.F.R Kouakou, Kouamé D. Kra, Hortense A. Diallo


The current study was designed to investigate the effects of the number of dried castor leaf product applications on the population dynamics and pathological activities of root-knot and root-lesion nematodes on water yam. One application of castor leaf products resulted in an increase in symptom development and nematode numbers three months after yam seed planting. This resurgence of nematodes may be due to the depletion of castor leaf products incorporated into the soil. In view of this concern, it was required to investigate the effects of the number of dried castor leaf product applications on water yam nematodes. Trials were run in the 2015 and 2016 crop seasons in the Autonomous District of Yamoussoukro in Côte d'Ivoire. Castor leaf powder, castor leaf extract, and carbofuran were applied on the tops of mounds before yam seed planting, as well as the 3rd and 6th months following yam seed planting, using a complete random block design with three replicates. The prevalence and severity index of symptoms, nematode numbers, and yam yield were determined depending on the treatments. The harvested yam tubers showed symptoms such as galls, cracks and dry rot upon observation. All products reduced the development of symptoms on tubers after several applications. From one to three applications of the products, the symptom prevalence and severity index decreased from 10.86 to 0% and 9.83 to 0%, respectively. The products reduced the nematode numbers by 22.22% to 96.15% when applied one to three times. Plants cultivated on soils incorporated with castor leaf powder and extract three times showed a yield increase of 4.15 and 1.82 t/ha, respectively. Castor leaf powder, applied three times, is an excellent yam nematode management tool.


Castor plant; formulations; nematodes; number of applications; population dynamics; water yam

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Abd-Elgawad, M. M. M. 2021. Optimizing safe approaches to manage plant-parasitic nematodes. Plants, 10(9): 1-20,

Abdulsalam, S., H. Peng, Y. Yao, L. Fan, R. Jiang, H. Shao, Y. Zhang, W. Huang, L. Kong and D. Peng. 2021. Prevalence and molecular diversity of plant-parasitic nematodes of yam (Dioscorea spp.) in China, with focus on Merlinius spp. Biology, 10(12): 1-17.

Abduzor, S and A. Haseeb. 2010. Plant growth and plant parasitic nematode in response to soil amendments with plant growth promoting rhizobacteria and inorganic fertilizer in Pigeon pea, Cajanus cajan L. World Applied Science Journal, 8(4): 411-413.

Adomako, J. and C. K. Kwoseh. 2013. Effect of castor bean (Ricinus communis L.) aqueous extracts on the performance of root-knot nematodes (Meloidogyne spp.) on tomato (Solanum lycopersicum L.). Journal of Science and Technology, 33: 1-11.

Almeida, A. M., R. M. Souza, V. M. Gomes and G. B. Miranda. 2011. Greenhouse and field assessment of different organic compounds against guava-parasitic Meloidogyne enterolobii. Bragantia Campinas, 71(1): 67-74.

Alui, K. A., A. Yao-Kouamé, K. C. Ballo, K. P. Kouadio, K. A. N’guessan and K. Y. Nangah. 2011. Comportement de deux morphotypes de Lippia multiflora (Verbenaceae) sur ferralsols de la région de Yamoussoukro. Journal of Applied Biosciences, 38: 2592-2601.

Barros, F. M. R., A. Pedrinho, L. W. Mendes, C. C. G. Freitas and F. D. Andreote. 2022. Interactions between soil bacterial diversity and plant-parasitic nematodes in soybean plants. Applied and Environmental Microbiology, 88(7): 1-14.

Bla, K. B., J. N. D. Trébissou, A. P. Bidié, Y. J. Assi, N. Zirihi-Guédé and A. J. Djaman. 2015. Étude ethnopharmacologique des plantes antipaludiques utilisées chez les Baoulé- N’Gban de Toumodi dans le Centre de la Côte d’Ivoire. Journal of Applied Biosciences, 85: 7775-7783.

Catani, L., B. Manachini, E. Grassi, L. Guidi and F. Semprucci. 2023. Essential oils as nematicides in plant protection. Plants, 12(6): 1-21.

Colovic, M. B., D. Z. Krsti, T. D. Lazarevic-Pasti, A. M. Bondzic and V. M. Vasic. 2013. Acetylcholinesterase Inhibitors: Pharmacology and Toxicology. Current Neuropharmacology, 11(3): 315-335.

Coyne, D. L. and A. Affokpon. 2018. Nematode parasites of tropical root and tuber crops (excluding potatoes) in Plant parasitic nematodes in subtropical and tropical agriculture; Luc, M., R. A. Sikora, J. Bridge, Eds.; CABI: Wallingford, UK. pp. 258–272.

Coyne, D. L., J. M. Nicol and B. Claudius-Cole. 2010. Plant nematodes: A practical guide to field and laboratory techniques. Cotonou, International Institute of Tropical Agriculture (IITA), Cotonou, Benin.

Daramola, F. Y., S. O. Afolami, A. A. Idowu and I. S. Odeyemi. 2013. Effects of poultry manure and carbofuran soil amendments on soil nematode population and yield of pineapple. International Journal of AgriScience, 3(4): 298-307.

Das, S., S. Jamal, M. Dutta, S. Rej and S. Chatterjee. 2015. Comparative phytochemical analysis and antimicrobial activity of four medicinal plants. European Journal of Medicinal Plants, 6(4): 191-199.

El-Nagdi, W. M. A. E. and M. M. A. Youssef. 2013. Comparative efficacy of garlic clove and castor seed aqueous extracts against the root-knot nematode, Meloidogyne incognita infecting tomato plants, Journal of Plant Protection Research, 53(3): 285-288.

Enagbonma, B. J., A. E. Fadiji, A. S. Ayangbenro and O. O. Babalola. 2023. Communication between Plants and Rhizosphere Microbiome: Exploring the Root Microbiome for Sustainable Agriculture. Microorganisms, 11(8): 1-15,

ENSEA. 2014. Situation de référence sur la banane plantain et autres produits du WAAPP. Rapport d’analyse des données, FIRCA, p. 190.

Farahat, A. A., A. A. Al-Sayed and N. A. Mahfoud. 2010. Compost and other organic and inorganic fertilizers in the scope of the root-knot nematode reproduction and control of Meloidogyne incognita infecting to tomato. Egyptian Journal of Agronematology, 9(1): 18-29.

Gupta, V. K., A. Pathak, N. J. Siddiqi and B. Sharma. 2016. Carbofuran modulating functions of Acetylcholinesterase from rat brain in vitro. Advances in Biology, 1-7.

Hassan, A. H., M. M. Ihab, I. Sherin, M. D. Turki, H. A. Jwaher, S. M. Ayman, A. K. Saleh, A. A. Roua, M. T. Azza and A. M. Sherif. 2020. Antimicrobial effect of different herbal plant extracts against different microbial population. Saudi Journal of Biological Sciences, 27(12): 3221-3227.

Hayat, A., N. Javed, S. A. Khan, A. S. Gondal and H. U. Khan. 2012. Effect of organic amendments on nematode galling index and egg masses production in potato inoculated with root knot nematode. Pakistan Journal of Phytopathology, 24(1): 1-5.

Kerkeni, A., N. Horrigue-Raouani and M. B. Khedher. 2007. Effet suppressif de cinq extraits de compost vis-à-vis du nématode à galles, Meloidogyne incognita. Nematologia Mediterranea, 35(1): 15-21.

Kouakou, Y. Y. F. R., K. D. Kra and D. H. Atta. 2016. Plant parasitic nematodes associated with deformation and degradation symptoms of yam tubers (Dioscorea spp.) in Côte d’Ivoire. International Journal of Agriculture Sciences, 8(54): 2906-2911.

Kouakou, Y. Y. F. R., K. D. Kra and D. H. Atta. 2023. Effects of two-dried castor leaf formulations on the population dynamics and pathological activities of root-lesion and root-knot nematodes on water yam. International Journal of Plant & Soil Science, 35(14): 33-41.

Kouakou, Y. Y. F. R., K. D. Kra, K. P. Assiri and H. Atta. 2017. Nematicidal effectiveness of products stemming from dried leaves of castor-oil plant (Ricinus communis) on Meloidogyne and Pratylenchus, yam pathogenic nematodes in Côte d’Ivoire. International Journal of Agronomy and Agricultural Research, 11(5): 57-68.

Lale, N. E. S. 2006. Dictionary of Entomology and Acarology. Mole Publications (Nig.) Ltd. Second Edition, pp. 198.

Mahdy, M. E., E. M. Mousa, E. Sanaa and A. E. Abeer. 2014. Effect of fresh and dry neem leaves applications on root-knot nematode Meloidogyne javanica on tomato plants. Egyptian Journal of Plant Protection, 9(1): 12-20.

N’guessan, K. E. 1990. Etude de l’évolution de la végétation du « V Baoulé » (contact forêt/savane en Côte d’Ivoire) par télédétection. Télédétection Sécheresse, Ed. AUPELF-UREF, pp.181-196.

Nobile, C. M., M. N. Bravin, T. Becquer and J. M.Paillat. 2020. Phosphorus sorption and availability in an andosol after a decade of organic or mineral fertilizer applications: Importance of pH and organic carbon modifications in soil as compared to phosphorus accumulation. Chemosphere, 239: 1-10.

Ogara, I. M. and R. N. D. Bina. 2010. Prevalence and persistence of galls and the galling nematodes Meloidogyne spp on yams in Nasarawa state, Nigeria. Acta SATECH, 3(2): 10-13.

Osei, K., E. Otoo, Y. Danso, J. Adomako, A. Agyeman and J. S. Asante. 2013. Organic soil amendments in nematode management in yam production. Nematropica, 43: 78-82.

Radwan, M. A., S. A. A.Farrag, M. M. Abu-ELamayem and N. S. Ahmed. 2012. Efficacy of dried seed powder of some plant species as soil amendment against Meloidogyne incognita on tomato. Archives of Phytopathology and Plant Protection, 45(10): 1246-1251.

Rodriguez, M. 2014. Calcul du rendement,, Accessed on 23/03/2016.

Severino, L. S., B. S. D. S. Mendes, R. D. C. C. Saboya, L. A. Barros and D. R. D. F. Marinho. 2021. Nutrient content of solvent-extracted castor meal separated in granulometric fractions by dry sieving and applied as organic fertilizer. Industrial Crops and Products, 161: 1-7.

Sithole, N. T., M. G. Kulkarni, J. F. Finnie and J. V. Staden. 2021. Potential nematicidal properties of plant extracts against Meloidogyne incognita. South African Journal of Botany, 139: 409-417.

Soro, G., E. K. Ahoussi, E. K. Kouadio, T. D. Soro, S. Oulare, M. B. Saley, N. Soro and J. Biemi. 2014. Apport de la télédétection à la cartographie de l’évolution spatio-temporelle de la dynamique de l’occupation du sol dans la région des Lacs (Centre de la Côte d’Ivoire). Afrique Science, 10(3): 146-160.

Zafar, M. I., A. Khalid, S. Kali, F. Khan, M. Tahir, M. Ali and A. Siddiqa. 2022. Organic amendments as an ecofriendly substitute of carbofuran for the suppression of nematodes associated with Malus pumila. South African Journal of Botany, 14: 187-193.

Zewain, Q. K. 2014. Evaluation of some chemical nematicides and organic formulations in management of root knot nematode Meloidogyne on eggplant. Journal of Tikrit University for Agricultural Sciences, Third Scientific Conference for Plant Production, Tikrit, Iraq: 8-14.



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