Efficiency and residue levels of a new acaricide, cyflumetofen (Danisaraba® SC, 20%) for control of Tetranychus urticae on greenhouse cucumber

Tetranychus urticae is one of the most important cucumber pests in the Iranian greenhouses. The efficacy of cyflumetofen (Danisaraba® SC 20%) with two concentrations of 0.75 and 1.0 ml/lit was evaluated and compared with two conventional pesticides, tetradifone (Tedion® EC 7.5%) and spiromesifen (Obron® SC 24%) in cucumber greenhouses of Jiroft and Varamin cities and the cyflumetofen residual amount with two doses was measured. Sampling was done at 1 day before spraying and 3, 7 and 14 days after spraying, and the number of alive mites was counted. In both cities, there was significant difference among treatments for 3 and 7 days after spraying and the effectiveness was higher at 7th day, then it reduced on the following days. In Jiroft, at 7th day after spraying, cyflumetofen 1.0 ml/l had the highest effect with 96% efficiency, followed by spiromesifen, cyflumetofen 0.75 ml/l, and tetradifone with 95, 84, and 73%, respectively. In Varamin, the efficacy of cyflumetofen 1.0 and 0.75 ml/l, spiromesifen and tetradifone at 7th day after spraying was 91.5, 72, 70% and 67.25%, respectively. To investigate the residual amount of cyflumetofen, 20 samples of cucumber fruit were extracted and analyzed in the laboratory. The results showed that spraying cyflumetofen in two used concentrations did not leave any residues on the cucumbers fruits at 3 and 7 days after treatment. Overall, the results showed that the cyflumetofen 1.0 ml/lit compared with tetradifone and spiromecifen can be used as suitable acaricide to control spider mite in cucumber greenhouse.