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Effect of Molasses Application Alone or Combined with Trichoderma asperellum T-34 on Meloidogyne spp. Management and Soil Microbial Activity in Organic Production Systems

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Department of Agri-Food Engineering and Biotechnology, Universitat Politècnica de Catalunya, Esteve Terradas 8, 08860 Castelldefels, Spain
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Baix Llobregat Vegetable Crop Protection Association, 08820 Barcelona, Spain
*
Author to whom correspondence should be addressed.
Academic Editors: Gloria Nombela, Francisco J. Beitia and Susana Pascual
Agronomy 2022, 12(7), 1508; https://doi.org/10.3390/agronomy12071508
Received: 27 April 2022 / Revised: 20 June 2022 / Accepted: 20 June 2022 / Published: 23 June 2022
(This article belongs to the Topic Integrated Pest Management of Crops)
The effect of molasses alone or combined with Trichoderma asperellum T34 Biocontrol® was assessed on Meloidogyne reproduction, disease severity, and density and activity of soil microorganisms in pot and field experiments. Firstly, molasses application at 1 mL m−2 was assessed in four different textured soils. Secondly, molasses application at 5, 10, 20, and 40 mL m−2, alone or combined with T34, was assessed in pot and field experiments at 10 mL m−2 in two different textured soils. The application of 1 mL m−2 of molasses was effective in reducing nematode reproduction in the loam textured soil but not in sandy clay loam, sandy loam, or clay loam textured soils. Increasing molasses dosage reduced the tomato dry shoot and fresh root weights, producing phytotoxicity at 40 mL m−2. The disease severity and nematode reproduction were reduced between 23% and 65% and 49% and 99%, respectively. In the field experiment, molasses applied at 10 mL m−2 reduced the disease severity and the nematode reproduction in the loam textured soil. The soil microbial density and activity did not increase in sites where the nematode reproduction and the disease severity were reduced by molasses application, irrespective of T34. View Full-Text
Keywords: Lactuca sativa L.; lettuce; organic amendments; root-knot nematodes; Solanum lycopersicum L.; tomato Lactuca sativa L.; lettuce; organic amendments; root-knot nematodes; Solanum lycopersicum L.; tomato
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MDPI and ACS Style

Expósito, A.; García, S.; Giné, A.; Escudero, N.; Herranz, S.; Pocurull, M.; Lacunza, A.; Sorribas, F.J. Effect of Molasses Application Alone or Combined with Trichoderma asperellum T-34 on Meloidogyne spp. Management and Soil Microbial Activity in Organic Production Systems. Agronomy 2022, 12, 1508. https://doi.org/10.3390/agronomy12071508

AMA Style

Expósito A, García S, Giné A, Escudero N, Herranz S, Pocurull M, Lacunza A, Sorribas FJ. Effect of Molasses Application Alone or Combined with Trichoderma asperellum T-34 on Meloidogyne spp. Management and Soil Microbial Activity in Organic Production Systems. Agronomy. 2022; 12(7):1508. https://doi.org/10.3390/agronomy12071508

Chicago/Turabian Style

Expósito, Alejandro, Sergi García, Ariadna Giné, Nuria Escudero, Sandra Herranz, Miriam Pocurull, Albert Lacunza, and Francisco J. Sorribas. 2022. "Effect of Molasses Application Alone or Combined with Trichoderma asperellum T-34 on Meloidogyne spp. Management and Soil Microbial Activity in Organic Production Systems" Agronomy 12, no. 7: 1508. https://doi.org/10.3390/agronomy12071508

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