Pathogenicity of the entomopathogenic fungus, Purpureocillium lilacinum TR1 against the Black Cherry Aphid, Myzus cerasi Fabricus (Hemiptera: Aphididae)

摘要

 Myzus cerasi (Fabricus)as a cosmopolitan species chooses plants from such families as Cruciferae, Plantaginaceae, Rosaceae, Rubiaceae and Scrophulariaceae as hosts. This pest species, which is widespread in our country, causes curling and distortion of the leaves by establishing large colonies on growing shoots. Besides, they cause the growth of black sooty fungi on account of the honeydew they secrete. It is known that this species can transmit several viruses including Bean yellow mosaic virus (BYMV), Celery mosaic virus (CeMV) and Onion yellow dwarf virus (OYDV) in a non-persistent manner. In this study, it is searched the effects of entomopathogenic fungi, [Purpureocillium lilacinum TR1 (syn.: Paecilomyces lilacinus)] on the black cherry aphid (BCA) adults in three conidial suspension (106, 107and 108cfu ml-1) and at two different temperatures (15 and 25?C) in laboratory conditions. The data for mortality was recorded after 2, 4, 6, 8 and 10 days intervals. At the end of the study highest effect was found at 25 ?C 108cfu ml-1. The mortality rate were found respectively after 6 and 8 days %73,48, %83,64 and the data was remained stable after 10 days. It will be appropriate that the results obtained from this first study performed in laboratory conditions should also to be tried in the field conditions for the control of M. cerasi. It is hoped that the study will be helpful in the control strategies of this aphid species that will be put forward in a future time. It is seen that after having obtained hopeful results from this study, making similar works on the other aphid species are also necessary