Evaluation of organic products for the control of red spider (Tetranychus urticae Koch) in strawberry cultivation (Fragaria vesca)

Abstract

In this research work, organic products were evaluated for the control of red spider (Tetranychus urticae Koch) in strawberry cultivation (Fragaria vesca), which was carried out on the property of Mr. Salomo?n Lozada, located in the province of Tungurahua, Canton Ambato, Constantino Ferna?ndez parish. The property is located at 2 843 meters above sea level, according to the 1986 Soil Map are deep soils with a clay-like texture.

Three organic products were used: Tarssus, Biosan and the combination of the two, the dose used was 1cc / l; 2cc / l and 3cc / l.
The factors under study were: Degree of initial infestation; degree of infestation at 15, 30, 45, 60 and 75 days after application and the degree of phytotoxicity at the end of the test; number of fruits per plant and weight of fruits per plant. The treatments were 9 plus a control (Omitted 1g / l). The randomized complete block design (DBCA) was used, in group analysis with three repetitions; For cases that presented significant statistical differences in the analysis of variance, 5% Tukey tests were performed. The application of Biosan in doses 2cc / l (P2D2), produced the best results when reporting the lowest degree of infestation at 60 days (0.92 degrees) and at 75 days (0.58 degrees) according to the scale exists absence of red spider on the underside of the leaf's central leaflet, as well as the lowest degree of phytotoxicity at the end of the test