Ticks are very important ectoparasites transmitting diseases to animals and humans and their natural control is an urgent need. The efficacy of nine novel aqueous plant extracts against Hyalomma dromedarii, semi-fed males,was evaluated through the adult immersion test;seven concentrations were applied (10, 20, 40, 90, 110, 130, and 170 mg/ml) for each plantextract.Plants could be arranged according to their Mortality (MO) percent, 15 days post-treatment (PT) with 170 mg/ml, as follows: 96% byRicinuscommunis;followed 84% by Alchemilla vulgaris,Cichorium endivia,Quercus cortex,and Salvia rosmarinus.Three, seven, and 12days PT, the LC50values of the highly effective group including R.communis (100.11, 30.34, and 30.22%), A. vulgaris (140.11, 60.94, and 50.38%),C. endivia (120.56, 60.13, and 30.80%),Q. cortex (110.87, 50.05, and 30.13%) and S. rosmarinus (110.73, 50.26, and 40.35%) werecalculated.The LT50values for the highly effective plantswere 1.000, 3.136, 2.282, 4.498, and 2.614 days, PT with 170 mg/ml, for R. communis,A. vulgaris,C. endivia,Q. cortex,andS. rosmarinusand their LT99values were 9.224,19.840, 19.296, 22.928, and 29.907 days, respectively. The relative toxicity of the A. vulgaris,Alliumsativum,C. endivia,Cyperusrotundus,Lepidiumsativum,Q. cortex,R.communis,andS. rosmarinus were 1.0, 1.6, 1.6, 1.2, 1.3, 1.7,1.7, and 12 times, more effective than Lawsoniainermis, respectively. Phytochemical analyses indicated the presence of phenolic, tannin, and flavonoid compounds. This study recommended using R.communisfor tick control, followed by Alc.vulgaris,Ci. endivia,Q. cortex,andS. rosmarinus