Plant Archives Volume 20 No. 1, 2020 pp. 1293-1297 e-ISSN:2581-6063 (online), ISSN:0972-5210 EFFECT OF FENPYROXIMATE IN NORMAL AND NANOPARTICLES TO THE CONTROL OF GHOBAR MITE OLIGONYCHUS AFRASIATICUS (MCGREGOR) (ACARI: TETRANYCHIDAE) Zeena M.M. Almrsomy, Sindab S.J. Al-Dahwy* and Abd-Alkarem J. Ali Department of Plant Protection, College of Agriculture Engineering Sciences University of Baghdad, Iraq. Abstract A field experiment was carried out to determine the effect of Fenpyroximate 5% SC in both normal and nanoparticles in the individuals of the dust mite Oligonychus afrasiaticus on the date palm trees in one of the Baghdad orchards. The results showed that the pesticide is superior in its nanoparticles when used with half of the recommended concentration on the pesticide in its normal form when used with the recommended concentration in influencing all stages of dust mite. The mortality rate of eggs, Immature moving stages (larvae and nymphs of the first and second phases) and adults (females and males) after 24 hours of spraying was 98.1, 97.1 and 98.3 % respectively when used in the nanoparticles. While 93.4, 95.3 and 98.3% for the stages respectively when used in the normal. Effectiveness of the pesticide continued to control all mite stages until three weeks after treatment. Key words: Oligonychus afrasiaticus, Nanopesticides, Fenpyroximate. Introduction Micronanoparticles are called particles of 1-100 nanometers, while particles larger than 100 nanometers are called macronanoparticles. When these particles become small, these particles acquire new physical, chemical and biological properties, as increasing the effective surface area relative to volume will increase chemical stimulation resulting in faster and stronger reactions (Owen and Depledge, 2015; Tawfeeq, 2014). Nanopesticides are formulations of active ingredients and adjuvants with nano particles. Therefore their active compounds are more soluble, increasing their ability to penetration through barriers and their effectiveness against the target pests increases compared to that of the conventional pesticide, these features allow the use of less pesticide without the need to re-apply while reducing the cost and reducing plant poisoning, as well as not to damage the environment and other non-target organisms (Al-Dahwi et al., 2009; Al-Dahwi et al., 2012). Many nanopesticides have been manufactured as fungicides, insecticides and mitecides and compared with commercial preparations of conventional pesticides. The nanopesticide was found to have a control efficiency that was several times higher than that of the conventional commercial preparation (Gopal et al., 2011; Margulis and Magdassi, 2012; Rouhani et al., 2012). In order to add more information in this subject carried out the current research to test the efficiency of the pesticide Fenpyroximate 5% SC in both normal and nanoparticles in all stages of the Ghobar Mite Olgonychus afrasiaticus on the date palm trees in one of the Baghdad orchards. Materials and Methods Preparation of Fenpyroximate Nanoparticles Fenpyroximate was converted to nanoparticles physically by exposing it to the Homogenizer Ultrasonic for 20 minutes. This device emits 22-24 kHz ultrasonic waves that break down physically exposed particles or particles and convert them from normal volumes to nanoscale volumes (Jayarambabu et al ., 2016). This device emits 22-24 kHz ultrasonic waves that break down physically exposed particles or particles and convert them from normal volumes to nanoscale volumes (Jayarambabu et al., 2016; Al-Shujairi, 2018). X-ray Diffraction Analysis An check up was carried out to confirm the transformation of the Fenpyroximate to the nanoparticles *Author for correspondence : E-mail: sindab_aldahwi@yahoo.com