Int. J. Pure Appl. Sci. Technol., 19(1) (2013), pp. 37-43 International Journal of Pure and Applied Sciences and Technology ISSN 2229 - 6107 Available online at www.ijopaasat.in Research Paper Pathogenicity Evaluation of Some Local Isolates of Entomopathogenic Fungi against the Nut Scale Insect Eulecanium Tiliae L. Lazgeen H. Assaf 1 , Feyroz R. Hassan 2, * and Dilshad S. Ahmad 2 1 General Directorate of Agriculture, Duhok, Kurdistan Region, Iraq 2 Plant Protection Department, School of Plant Production, Faculty of Agriculture and Forestry, Duhok University, Kurdistan Region, Iraq * Corresponding author, e-mail: (feyrozrh77@yahoo.com) (Received: 9-8-13; Accepted: 18-9-13) Abstract: Laboratory bioassays were conducted to evaluate the pathogenicity of Beauveria bassiana, B. brongniartii, Paecilomyces farinosus and Isaria Javanicus as biocontrol agents against nut scale insect Eulecanium tiliae L. with concentration ( 10 7 ) spores / ml for each fungus . Results indicated that the four fungi were pathogenic to nut scale insect nymph and adults with varying capabilities according to the fungus species and exposure duration. The nymphs instars were more susceptible than the adults. The mortality percentages increased significantly with I. javanicus and B. bassiana reached 100% in both female and male nymphs after 10 days of treatment. Cumulative adult mortality of 98.47% and 65.71% was achieved after 12 days from inoculation with I.javanicus and P. farinuses spore suspension respectively. Keywords: Eulecanium tiliae, Entomopathogenic fungi, Soft scale insects. Introduction There are about 7800 described species of scale insects (Hemiptera: Coccidae ) in the world. Most are important pests of agriculture, forestry, fruit orchards, horticulture and ornamental plants (Ben- Dov et.al. 2009). Akrawi, 2011 mentioned that in Iraq, specially in Kurdistan region the soft scale insect (nut scale insect) Eulecanium tiliae L. is the most important pest of the fig trees and causes a series damage by sucking the trees sap. Also the latter author added that the nut scale insect have two nymphal instars besides the pupal stage in case of males. Sharma and Dogna (1982) mentioned that soft scale insects Eulecanium tiliae is slowly and gradually building up it's population and if left unchecked may attain the status of a major pest.