تم في هذا البحث دراسة تأثير تغذية يرقات العمرين الأول و الرابع لفراشة درنات البطاطا P. operculella على نباتات بطاطا ملقحة بالمعلق البوغي للفطر B.bassiana تركيزه (0.75×10^7 بوغة\مل).
Biological tests were study the pathogenicity of four
local isolates of Beauveria bassiana (Bals) orginated
from, Latakia , Homs ,ICARDA Jableh on third larval age of Bactrocera oleae.
Six different isolates of the fungus Beauveria bassiana were isolated from local
soils, which collected from two different ecosystems (Natural and Cultivated), at the
Syrian Coastal region, using the "Galleria Bait Method". The mortality caused by
these
fungal isolates against Galleria mellonella larvae was 100% after 3- 5 days post
treatment. The pathogenicity of these isolates was studied against 3rd instar larvae of
Spodoptera littoralis to detect the most virulent isolate. The mortality ranged from 75% to
100% for the all isolates at the 5th day post treatment. Spore suspension of the most
virulent isolate was used at concentration 106spore/ml by spraying it on the pupae of S.
littoralis. The percentage of adult emergence was 42% in the fungal treatment compared to
the control treatment.
The pathogenicity of three isolates of the fungus Beauveria
bassiana (Bals.) Vuill were evaluated on potato tuber moth
Phthorimaea operculella (Zeller) (Lep.,Gelechiidae).
