Pesticides against the "two-spotted spider mite" Tetranychus urticae Koch, 1836, on cotton

Abstract

A field test was carried out in Americana, State of São Paulo, Brazil, to evaluate the control of the "two spotted spider mite", the main pest on cotton in that area. The treatments were eitht with four repetitions (each repetition ocupied 150 m² and each treatment, 600 m²). The treatments and active ingredients per hectare were as follows: A) check; B) triazophos, 300 g; C) monocrotophos, 600 g; D) biphenthrin, 55 g; E) fenpropathrin, 150 g; F) biphenthrin, 60 g; G) binapacryl, 800 g; H) clofentezine, 750 g. Five counts of the mite were made: the first, three days before the spray and 01, 05, 08 and 13 days after spraying. The best results were obtained with biphenthrin and binapacryl (05 days); biphenthrin and clofentezine (08 days) and clofentezine (13 days).