Isolement et caractérisation partielle des nématodes phytopathogènes du gingembre (Zingiber officinale Roscoe) dans la Région d’Alaotra Mangoro, Madagascar.

In Madagascar, ginger (Zingiber officinale Roscoe), produces an exceptional quality essential oil that can be sold in international markets. Despite this potential, growers in the Alaotra Mangoro Region are facing significant decrease of yields and crop quality over five growing seasons. A comprehensive field was conducted among key stakeholders within the Alaotra Mangoro Region and soil and plant samples from ginger cropping fields were taken. Typical symptoms indicating plant parasitic nematode attack causing rotting followed by death of the plant were observed. Isolation from soil and plant samples revealed the presence of plant parasitic nematods belonging to the following genders: Helicotylenchus spp., Xiphinema spp., Tylenchus spp. and Meloidogyne spp. Identification of pathogenic agents is essential for establishing an effective control strategy.

Key-words: Alaotra Mangoro, exportation, gall, ginger, plant parasitic nematod, rotting

20/03/2025