FIRST REPORT OF PLANT-PARASITIC NEMATODES ASSOCIATED WITH CHAYOTE (SECHIUM EDULE (JACQ.) SW.) IN VIETNAM

Abstract

Chayote, known for its nutritious, is a perennial vine originating from Mesoamerica and now cultivated globally. This study documents the first report of plant-parasitic nematodes associated with chayote (Sechium edule (Jacq.) Sw.) in Vietnam, addressing a critical knowledge gap in the pest management of this underutilized crop. Three genera, including Hirschmanniella, Helicotylenchus, and Tylenchorhynchus, were identified, with Tylenchorhynchus being the most predominant, averaging 152 nematodes per 250g of soil and found in 100% of soil samples. Hirschmanniella, despite a lower density, showed a high frequency of 92.9% in soil samples. Cluster analysis indicated no clear geographic correlation in nematode distribution, suggesting other environmental and agricultural factors play significant roles. The findings highlight the urgent need for targeted pest management strategies, including integrated pest management practices, to mitigate nematode infestations and improve chayote cultivation in Vietnam. This research underscores the importance of investigating underutilized crops to enhance agricultural sustainability and food security.