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Open AccessArticle

Effect of Plant Extracts and Metam Sodium on the Soilborne Fungal Pathogens, Meloidogyne spp., and Soil Microbial Community

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Group of Soil Enzimology and Biorremediation and Organic Wastes; CEBAS-CSIC, Campus Universitario de Espinardo, P.O. Box 164, CP 30100 Murcia, Spain
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Métodos Servicios Agrícolas. Ctra El Rellano (A-20), 1.9, CP 30540 Blanca, Spain
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(4), 513; https://doi.org/10.3390/agronomy10040513
Received: 2 March 2020 / Revised: 30 March 2020 / Accepted: 1 April 2020 / Published: 3 April 2020
In this field study, the fungicidal and nematicidal activity of two plant extracts (Larrea spp. (LR), Liquidambar spp. (LQ)), and an organosulfur soil fungicide metam sodium alone (MS), and a mix of LR and MS (LR + MS) was assayed under pepper cropping in southeastern Spain. Metam sodium treatments (MS and LR + MS) produced the highest crop yields and were more effective in controlling root-knot nematodes and fungal pathogens (Fusarium, Pythium, and Rhizoctonia solani) than the plant extracts treatments (LQ and LR). Furthermore, the effect of the metam sodium treatments applied negatively affected the soil microbial community, principally bacteria, but not fungi. These microbial community changes of the soil were principally observed after treatment application; the differences between the treatments were reduced at the end of the experiment, when recovery of the soil microbiota communities occurred. View Full-Text
Keywords: soil fumigation; plant extract; root-knot nematodes; pepper crop; 16S rRNA; ITS2; amplicon sequencing soil fumigation; plant extract; root-knot nematodes; pepper crop; 16S rRNA; ITS2; amplicon sequencing
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Montiel-Rozas, M.M.; Díez-Rojo, M.Á.; Ros, M.; Pascual, J.A. Effect of Plant Extracts and Metam Sodium on the Soilborne Fungal Pathogens, Meloidogyne spp., and Soil Microbial Community. Agronomy 2020, 10, 513.

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