Comparison of mortality effects of three acaricides on the two spotted mite (Tetranychus urticae koch) on three varieties of roses in greenhouse conditions

Rose is one of the most important priorities in production of flowers and ornamental plants due to its beauty and high use. Tetranychus urticae is one of the most serious pests of roses in greenhouses of Markazi province, Iran. In recent years, chemical pesticides are mainly used to control this pest. The effect of three acaricide, Baroque, Abamectin and Fenazacoein on nymphs of Tetranychus urticae was investigated on three varieties of roses, Utopia, White Naomi and Dolcevita. Number of nymphs in one square centimeter of leaves were counted 1, 3, 5, 7 and 14 days after spraying. The means comparison of the percentage of Nymph mortalities showed that Baroque on Dolcevita had the greatest and Abamectin on Utopia had the least effect most and three days after the first treatment Moreover, Abamectin on White Naomi had the greatest and Fenazacoein on Dolcevita had the least effect most and five days after the second treatment. This research showed that Baroque and Abamectin on Dolcevita and White Naomi had the most effect on decreasing of the pest population.