Arroyo Martínez, Roberto J.

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    Evaluación de productos probióticos en el crecimiento del plátano y su efecto sobre poblaciones de nematodos endoparásitos migratorios
    (2024-05-09) Arroyo Martínez, Roberto J.; Vargas-Ayala, Roberto; College of Agricultural Sciences; Giraldo-Zapata , Martha C.; Morales Payán, Pablo; Department of Agro-Environmental Sciences; Villavicencio Mattos, John
    Plantains is considered one of the crops of greatest economic importance in Puerto Rico. Over the years the production has been affected by different factors, including damage caused by plant-parasitic nematodes. Radopholus similis is a migratory endoparasitic nematode that affects a diverse number of crops and causes great economic losses. Plant Probiotics are cocktails that contain a combination of microorganisms that are beneficial for the plant and soil. Different studies have been carried out that proved the effectiveness of these microorganisms not only in the benefits they confer to the plant but also in the biocontrol of plant-parasitic nematodes. In this research, two trials were carried out (in vitro and greenhouse), where four plant probiotic products were evaluated at three different concentrations (1 ppm, 3 ppm and 10 ppm). The products evaluated were: Mikrobs®, Plant Probiotics®, Bigfoot Mycorrhizae® and EM.1®. In the in vitro assay, the effect of concentrations on the mortality of J2 stages of Radopholus similis were determined. Results showed that the products Mikrobs® (10 ppm) and EM.1® (10 ppm and 3 ppm) reduced the greatest number of nematodes after 72 hours of exposure, obtaining mortality percentages of 92%, 90.67% y 86.67% respectively. Regarding the trial carried out in the greenhouse, the concentrations were evaluated at various growth parameters of banana seedlings and the suppression effect on Radopholus similis. Mikrobs® at a concentration of 10 ppm obtained the highest averages significantly in five of six growth parameters, these being: number of leaves, pseudostem diameter, root length, fresh and dry root weight. Regarding nematode control, concentrations of 3 ppm and 10 ppm obtained the lowest root damage rates. The lowest amount of nematodes/100g of root was found when Mikrobs® was applied at a concentration of 10 ppm.