Identificación de nematodos fitoparásitos asociados a la rizosfera del cultivo de chirimoya (Annona cherimola Mill.), en 5 zonas productoras de la provincia de Loja.

Plant-parasitic nematodes represent a significant threat to agricultural production due to their negative impact on crop root systems. In the province of Loja, Ecuador, cherimoya (Annona cherimola Mill.) is an economically important fruit tree; however, the lack of specific studies on the presence and distribution of nematodes in its rhizosphere limits the development of effective management strategies. This study aimed to identify the genera of plant-parasitic nematodes associated with the rhizosphere of cherimoya crops in five producing areas of Loja, using morphological and morphometric analyses. To this end, 1 kg soil samples and 100 g of roots were collected. Nematodes were extracted from the soil using a combination of Cobb sieving and Baerman funnel methods, and the root system was extracted using the Stermerding method. These nematodes were then identified in the laboratory using specialized techniques. The results showed the presence of nine genera of plant-parasitic nematodes, including Helicotylenchus sp., Tylenchus sp., Xiphinema sp., Criconemoides sp., Pratylenchus sp., Aphelenchus sp., Paratylenchus sp., Tylenchorhynchus sp., and Meloidogyne sp. the population density of each genus was determined in soil (808 individuals in 100 g) and roots (220 individuals in 10 g), allowing an assessment of their potential impact on the crop. The findings of this research will contribute to the development of integrated nematode management strategies, providing producers with tools to mitigate the effects of these pests and improve the sustainability of cherimoya cultivation in the region.

• Κύριος συγγραφέας: Ortega Jaramillo, Rogger Esteban (author)
• Μορφή: bachelorThesis
• Γλώσσα: spa
• Έκδοση: 2025
• Θέματα: ANNONA CHERIMOLA; NEMATODOS FITOPARASITOS
• Διαθέσιμο Online: https://dspace.unl.edu.ec/jspui/handle/123456789/32499