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Effect of Radopholus similis on plant growth and yield of plantains (Musa, AAB)

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For more content, see Nematologica.

A study was conducted over two growth cycles in a field naturally infested with Radopholus similis to assess the effect of this nematode on plant growth and yield of plantains (Musa, AAB) in Njombe, Cameroon. The nematicide Cadusaphos was used to control R. similis and the improvement in yield was measured. No significant reductions in plant height, pseudostem circumference, number of functional leaves or in the duration of the plant growth cycle between treated and untreated plots were recorded. Bunch weights did not differ between treatments. However, a significant difference was found in the number of uprooted plants between nematicide treated and untreated plots with 2.5 and 18.3% losses during the first crop and 7.5 and 52.5% during the second crop, respectively. In plots treated with Cadusaphos, yields were two times greater than untreated plots during both cycles.

Une étude a été réalisée pendant deux cycles de production en plein champ infesté naturellement par Radopholus similis pour évaluer l’effet de ce nématode sur le rendement des plantains (Musa, AAB) à Njombé, Cameroun. L’utilisation du nématicide Cadusaphos a permis de mesurer le gain de rendement dss au contrôle de ce nématode. Les résultats n’ont pas révélé de diminution significative des paramètres de croissance (hauteur, circonférence et nombre de feuilles vivantes) et de la précocité des plants dans les parcelles non traitées par rapport aux parcelles traitées. Le poids des régimes n’a pas significativement varié entre les traitements. Cependant, nous avons observé une différence significative du nombre de plants déracinés entre les traitements; le taux de chute a été de 2.5 et 18.3% au premier cycle et de 7.5 et 52.5% au second cycle, respectivement pour les parcelles traitées et non traitées. Pendant les deux cycles de production les rendements des parcelles traitées au nématicide ont été deux fois supérieurs à ceux des parcelles non traitées.


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