Published
2023-06-20
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Epidemiological study of Rhizoctonia solani Kühn in five commercial genotypes of potato (Solanum tuberosum L.) from Nariño

DOI: https://doi.org/10.22490/21456453.6353
Section
Área Agrícola

Categories

Jessica Descanse Universidad de Nariño
Carlos Betancourth Universidad de Nariño
Claudia Salazar Universidad de Nariño
Benjamin Sañudo Universidad de Nariño

Context: the potato crop, in Nariño, presents a significant number of commercial varieties, but diverse phytosanitary problems [like the pathogen R. solani Kühn] affect its production and yield.

Knowledge gap: there is no information, in the department of Nariño, about the attack of this phytopathogen to different potato genotypes.

Purpose: the objective of this research was to determine the damage caused by black scurf [R. solani Kühn] on five commercial potato varieties in the department of Nariño.

Methodology: in three potato producing municipalities of the department of Nariño [Ipiales, Pasto and Túquerres], using a Randomized Complete Block Design [with four replications and five treatments] were evaluated these variables: Incidence on emergence and sprouting, incidence on harvest, and Commercial yield.  Finally, it was carried out an analysis of variance, using Tukey’s comparison tests.

Results and Conclusions: in the locality of Túquerres, the highest percentage of incidence in emergence and sprouting was obtained [36.04 %], with statistical differences in comparison to the localities of Pasto [30.70 %] and Ipiales [31.98 %]. For the harvest incidence variable, the Roja Huila genotype [in Túquerres] was the most affected, reaching an incidence percentage of 19.94 %. Finally, in the evaluation of commercial Yield, the Superior genotype [in Pasto] presented the best performance, with an average of 22.37 t/ha.