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DOI: 10.15580/GJAS.2016.9.101416162 Background: The work herein reported has been conducted in the framework of the implementation of the strategy of food security strategy in Côte d’Ivoire. In this perspective, FHIA 21 and PITA 3, two high yielding plantain hybrids, resistant to black Sigatoka have been assessed relatively to their response to Radopholus similis and Pratylenchus coffeae. Methods: FHIA 21 and PITA 3 were inoculated with increasing inoculum levels of the parasites under monoxenic conditions: 5, 10, 15 and 20 R. similis or P. coffeae/g roots and dixenic conditions: 3 R. similis and 3 P. coffeae; 5 R. similis and 5 P. coffeae; 10 R. similis and 10 P. coffeae; 10 R. similis and 5 P. coffeae; 5 R. similis and 10 P. coffeae/g roots. The cultivar HORNE 1 served as susceptible reference in both trials that were conducted in the glasshouse for eight weeks. Results: FHIA 21 appeared resistant to R. similis (R=0.98) and susceptible to P. coffeae (R=2.99). As to PITA 3, it was susceptible to both R. similis (R=2.47) and P. coffeae (R=2.94). Host suitability was further confirmed when comparing nematode reproduction under the hybrids to that under HORNE 1. FHIA 21 was designated slightly resistant to R. similis with a reproduction of 40.22 % and susceptible to P. coffeae (83.27%). The susceptibility of PITA 3 was also confirmed to R. similis (83.27%) and P. coffeae (73.63%). Conclusion: With R. similis, the threshold of 10 nematodes/g of roots commonly used for rational nematicide applications in banana cultivation was confirmed. In the light of the predominance of P. coffeae in banana and plantain agrosystems in Côte d’Ivoire, the new reference threshold of 5 P. coffeae/g roots is recommended for an effective management of plant-parasitic nematode pressure. Submitted: 14/10/2016 Accepted: 21/10/2016 Published: 31/10/2016

Host Status of Plantain Hybrids FHIA 21 and PITA 3 for Populations of Radopholus similis and Pratylenchus coffeae in Côte D’ivoire