RT article T1 Efficacy of five selected acaricides against Tetranychus urticae (Acari: Tetranychidae) and their side effects on relevant natural enemies occurring in citrus orchards A1 Urbaneja, Alberto A1 Pascual-Ruiz, Sara A1 Pina, Tatiana A1 Abad-Moyano, Raquel A1 Vanaclocha, Pilar A1 Montón, Helga A1 Dembilio, Óscar A1 Castanera, Pedro A1 Jaques, Josep A. K1 Animals K1 Beetles/drug effects K1 Citrus/parasitology K1 Hymenoptera/drug effects K1 Insecticides/pharmacology/toxicity K1 Plant Diseases/parasitology K1 Predatory Behavior K1 Tetranychidae/drug effects K1 Tick Control AB BACKGROUND: Three groups of natural enemies are fundamental in citrus IPM in Spain: coccinellid and phytoseiid predators and hymenopteran parasitoids. Tetranychus urticae Koch is an important pest affecting citrus, for which biological control has not yet been achieved; therefore, acaricides are commonly used to control it. The goal of this study was to measure the efficacy of different acaricides on this mite and their side effects on three natural enemies relevant for citrus (Cryptolaemus montrouzieri Mulsant, Neoseiulus californicus McGregor and Aphidius colemani Viereck). RESULTS: Some products proved highly effective against T. urticae and harmless to A. colemani (mineral oil, tebufenpyrad, clofentezine and fenazaquin). However, almost all products tested were slightly harmful for both the predators considered. Fenazaquin was even moderately harmful for N. californicus. CONCLUSION: Further studies, like that presented here, are necessary to gain a better understanding of integrating biological and chemical controls. When considering both efficacy and side effects on beneficial arthropods, the best options would seem to be mineral oil, tebufenpyrad and clofentezine. However, it is urgent to complete testing of the side effects of the acaricides used in citrus. This question is crucial if the fact that two recently introduced Tetranychidae are being controlled in citrus by chemical means exclusively is considered. SN 1526-498X; 1526-498X YR 2008 FD 2008 LK http://hdl.handle.net/20.500.11939/4642 UL http://hdl.handle.net/20.500.11939/4642 LA en NO Urbaneja, A., Pascual-Ruiz, S., Pina, T., Abad-Moyano, R., Vanaclocha, P., Monton, H., Dembilio, O., Castanera, P., Jacas, J.A. (2008). Efficacy of five selected acaricides against Tetranychus urticae (Acari: Tetranychidae), and their side effects on relevant natural enemies occurring in citrus orchards. Pest management science, 64(8), 834-842. DS MINDS@UW RD Aug 19, 2022