Control of the "two-spotted spider mite" Tetranchus urticae Koch, 1836 and the cotton boll weevil Anthonomus grandis grandis Boheman, 1843

Abstract

A field test was carried out in Santa Bárbara D'Oeste, State of São Paulo, Brazil, in order to evaluate the control of the "two-spotted spider mite", a major pest in that area. The treatments had eight with four repetitions (each repetition utilized 200 m² and each treatment, 800 m². The treatments and active ingredients per hectare were as follows: A- check; B - fenpropathrin, 300g; C - binapacryl, 400g; D - flubenzimine, 600g; Ecarbamate UC 81341, 150g; F - clofentezine, 150g; G - biphenthrin, 70g; H -clofentezine, 375g. In all treatments, including check also, was sprayed endosulfan against the cotton boll weevil. Treatment F received three sprays and the other only one. Several counts of the mite were made. The best results were obtained with clofentezine (150g/ha sprayed three times)and biphenthrin (70g/ha). Thirtyfour days after the general spray 400 bolls were collected per treatment to evaluate the cotton weevillboll infestatio. Damage was high and similar in all t reatments.