Antecedents/Objectives.

Guerrero is an important producer of roselle (Hibiscus sabdariffa); therefore, the objective was to evaluate the inhibitory effect of resins in vitro using four factors: technique (disc in agar or Kirby Bauer and well in agar), resins (B. linanoe, J. curcas, mixture of both and Thiabendazole), volume (10, 20 and 30 µL) and phytopathogenic fungi (C. cassiicola, F. oxysporum and F. solani) on the diameter of the inhibition halo.

Materials and Methods.

Statistical analysis was performed with a completely randomized factorial design with fixed effects to compare the 72 treatments using the Kruskal-Walis test.

Results.

All terms were found to be significant, the main effects of technique, resins, volume and fungi on the diameter of the inhibition halo, but also the double, triple and quadruple interactions.

Conclusion.

B. linanoe resin showed higher inhibition for C. cassiicola and F. oxysporum, in the two techniques (agar well and agar disc technique or Kirby Bauer technique), this makes it the resin type with the highest biocontrol potential.

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