Preferencia de oviposición y manejo de huevos de Tetranychus urticae Koch en rosas de corte (Rosa hybrida)

Tetranychus urticae Koch is a major pest of cut roses destined for export. This study aimed to identify the oviposition behavior of T. urticae on four rose cultivars and to evaluate the effect of a biopesticide on its eggs. The rose cultivars studied were Brighton, High Magic, Freedom, and Hot Explorer. The biopesticide under evaluation was a commercial product based on Ruta graveolens L. Breeding units were utilized for the two experiments. Significant statistical differences were observed between cultivars for number of eggs and the oviposition period (p<0.0110 and p= 0.0358, respectively). Freedom was the cultivar with the lowest number of T. urticae eggs, with a median of 7.00, and also exhibited the shortest oviposition period (4.00 days). The evaluation of the biopesticide showed no significant statistical differences between treatments. However, the treatment with the highest number of non-viable eggs was R. graveolens extract at 3 cc/l, with a median of 4.00 eggs. In conclusion, the oviposition preference of T. urticae was observed for the colored cultivars over the red cultivar. The Freedom cultivar (red color) had the lowest number of eggs, the shortest oviposition period, and the shortest survival time. The 10 % R. graveolens extract has the potential to be developed as a biopesticide.