تقويم التلقيح بعزلات محلية من الفطرBeauveria Bassiana (Balsamo)‎ Vuill. في مكافحة فراشة درنات البطاطا البطاطس Phthorimaea operculella (Zeller)‎ في الحقل

الملخص EN

To improve field biological control of potato tuber moth, Phthorimaea operculella (Zeller), the efficacy of three Syrian isolates of the entomopathogenic fungus Beauveria bassiana (Balsamo)Vuill., at concentration of 1×108 spores/ml, were evaluated in Homs (Syria).

The inoculum was applied by employing two methods; in the first method tubers were sprayed with the concentration of 1×108 spore/ml before planting, whereas in the second method, one true leaf of each plant was sprayed with the same spores concentration mentioned above.

Results obtained showed efficacy of all isolates in controlling the pest, with some superiority of isolate C, when using both inoculation methods.

In addition to the superiority of leaf inoculation, infection rate was reduced in the tubers formed in treated plants by 51.2, 50.56 and 46.4% for isolates C, B and D, respectively.

Tubers inoculation method reduced the infection rate to 30.36, 23.35 and 12.25% for the same isolates, respectively.

This study demonstrated the efficacy of B.

bassiana fungus as an important component in the integrated pest management of potato tuber moth under field conditions