Evaluación de biospider para el control de araña roja (Tetranychus urticae Koch.) en cultivo establecido de fresa VAR.San Andreas en invernadero.

Abstract

In this research, five doses of the product BIOSPIDER were evaluated to control red spider mite (Tetranychus urticae) in an established crop of strawberry variety San Andreas cultivated under a glasshouse. A completely randomized design (CRD) with five treatments and three replications, and the control (no application) was used. The applications were every 15 days, the commercial dose was 5 ml.L-1 and it was increased and decreased by 25 and 50 percent. The variable of initial pest infestation was evaluated every 15 days according to the number of live red spider mites. Later, the initial and final incidence of the pest was obtained when these mites are present or absent, and the efficacy percentage of the product was determined according to the equation proposed by Henderson-Tilton. Finally, the yield in grams per plant was obtained in order to carry out an economic analysis of each treatment, taking into account the income and expenses invested in the research. The results show that the dose of 5 ml.L-1 reached the highest percentage of efficacy in controlling the pest with 51%. The highest Benefit/Cost ratio was obtained with the dose of 7, 5ml.L-1, the yield increased when the dose of the product was high. It is concluded that BIOSPIDER in its commercial dose is more effective to control the red spider mite. It is recommended further research into this organic product because there is no information about the control of red spider mite.