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Effect of Ulvan on the Biocontrol Activity of Debaryomyces hansenii and Stenotrophomonas rhizophila against Fruit Rot of Cucumis melo L.

1
Centro de Investigaciones Biológicas del Noroeste, 23096 La Paz, Mexico
2
Facultad de Ciencias Agrícolas Universidad Veracruzana, 91090 Xalapa Veracruz, Mexico
3
Centro de Investigaciones en Tecnología y Diseño del estado de Jalisco, 44270 Guadalajara Jalisco, Mexico
*
Author to whom correspondence should be addressed.
Agronomy 2018, 8(12), 273; https://doi.org/10.3390/agronomy8120273
Received: 18 October 2018 / Revised: 13 November 2018 / Accepted: 19 November 2018 / Published: 22 November 2018
(This article belongs to the Section Horticultural and Floricultural Crops)
In the present study, the following was investigated: (a) The effect of ulvan on in vivo and in vitro biocontrol of Debaryomyces hansenii and Stenotrophomonas rhizophila against Fusarium proliferaum and (b) the effect of ulvan on in vivo and in vitro growth of D. hansenii and S. rhizophila and muskmelon quality parameters. The results showed that the biocontrol activity of D. hansenii and S. rhizophila could be enhanced by ulvan (5 g/L). The combination of ulvan and S. rhizophila resulted in a more effective control of fruit rot in comparison to fungicide benomyl. On in vitro growth of F. proliferatum, individual treatments of D. hansenii and S. rhizophila inhibited spore germination and mycelial growth with no statistical difference with the combined treatments. Ulvan does not have a direct effect on the in vivo and in vitro growth of D. hansenii and S. rhizophila. Furthermore, the combined treatments improve the natural disease incidence and quality parameters like weight, firmness, total soluble solids (TSS), and pH. These results suggest that the use of ulvan may be an effective method to improve the biological activity of D. hansenii and S. rhizophila. View Full-Text
Keywords: biocontrol; Debaryomyces hansenii; Stenotrophomonas rhizophila; ulvan; muskmelon; Fusarium spp. biocontrol; Debaryomyces hansenii; Stenotrophomonas rhizophila; ulvan; muskmelon; Fusarium spp.
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Rivas-Garcia, T.; Murillo-Amador, B.; Nieto-Garibay, A.; Chiquito-Contreras, R.G.; Rincon-Enriquez, G.; Hernandez-Montiel, L.G. Effect of Ulvan on the Biocontrol Activity of Debaryomyces hansenii and Stenotrophomonas rhizophila against Fruit Rot of Cucumis melo L.. Agronomy 2018, 8, 273.

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