April 09, 2026 | Plant disease |
This study conducted by the Institute of Food and Agricultural Sciences, University of Florida, U.S.A., investigated the distribution of plant-parasitic nematodes (PPNs) in tropical fruit production systems in South Florida. PPNs are important soil-borne pests that damage roots, reduce nutrient uptake, and negatively affect crop productivity. However, information on their occurrence and relationship with soil characteristics in tropical fruit orchards remains limited.
Between 2022 and 2023, soil samples were collected from 89 fruit tree fields representing crops such as avocado, guava, mango, lychee, dragon fruit, longan, passionfruit, and banana. The study identified nine nematode genera, with Rotylenchulus and Mesocriconema being the most frequently detected. Statistical analyses showed that both host crop species and soil properties strongly influenced nematode distribution. Organic matter content was positively associated with Rotylenchulus populations, while electrical conductivity correlated with Hoplolaimus, Pratylenchus, and Helicotylenchus. Certain nematode groups also showed crop-specific associations, such as Meloidogyne and Helicotylenchus with guava and dragon fruit, and Hoplolaimus and Pratylenchus with avocado.
The findings demonstrate that tropical fruit species and soil conditions jointly shape nematode communities in South Florida orchards. The study provides baseline information that can support targeted nematode monitoring and the development of crop- and soil-specific management strategies for tropical fruit production systems.
