Yasar, IpekKok, SahinKasap, Ismail2025-01-272025-01-2720231302-70502146-5894https://doi.org/10.33462/jotaf.1148184https://search.trdizin.gov.tr/tr/yayin/detay/1183796https://hdl.handle.net/20.500.12428/20674Tetranychus urticae Koch (Acari: Tetranychidae) is one of the phytophagous pests that cause serious economic losses in many cultivated plants. In the control of T. urticae, the use of chemicals usually comes to the fore. However, the use of chemicals in excessive amounts and in inappropriate times and doses causes many negativities because they leave residue and toxic effects on the products. Recently, studies on the effects of extracts obtained from plants on agricultural pests have been increasing day by day and yield successful results. In the study, the effect of an insecticide, which is a commercial formulation of orange oil, on egg laying behavior and acaricidal effect on T. urticae at different doses were investigated. The experiments were carried out in laboratory conditions at 65 +/- 10% humidity and 25 +/- 2 degrees C temperature conditions, on bean leaves, using leaf disc dipping method, using 5 different application doses (0.2, 0.4, 0.6, 1 and 2 ml of 100 ml-1 water) and 5 was carried out recursively. Observations were made at 1, 24, 48, 72 and 96 hours after the application by taking the counts of dead and live individuals. As a result of this study, the highest acaricidal effect on T. urticae individuals was determined with a mortality rate of 75.56% at 2% concentration of orange oil 96 hours after the application. In the 96th hour observations, the lowest acaricidal effect was detected at a concentration of 20% to 0.2%. Accordingly, it was observed that the acaricide effect increased as the concentration and duration of the orange oil studied in the study increased. When the effect of the insecticide with orange oil active substance on the egg laying behavior of T. urticae was examined, the number of eggs in the control group was determined as 99.40 +/- 1.26 at the same observation time, at the 2% concentration of the insecticide used, while 8.80 +/- 1.87 eggs were detected at the end of 96 hours. As a result, the acaricidal effect of orange oil on T. urticae shows that it can be used as an alternative control agent to chemical control.eninfo:eu-repo/semantics/openAccessEgg-layingAcaricidal effectHerbal extractOrange oilTetranychus urticaeArticle20210.33462/jotaf.1148184N/AWOS:0009919000000152-s2.0-851655955801183796Q3