Author(s):

Onur Aker and Samet Hasan Abaci

Abstract: The Filbert Aphid is one of the pests of hazelnut growing area of Turkey. This study was carried out all fungal isolates caused significant mortality against third instar nymphs of filbert aphid after 3, 6 and 10 days of conidial treatments at 18, 22 and 25 °C temperatures under laboratory conditions. The results showed that third instar nymphs of M. coryli were more susceptible to the entomopathogenic fungi at 25 °C than 18 °C. M. anisopliae was highly and statically equally effective against nymphs of M. coryli at 18, 22 and 25 °C (80,8%, 93,8%, 100%) after 10 days of conidial treatment. The other isolates; TR-05 and TR-78.07 weren’t so effective as M. anisopliae on nymphs of M. coryli at 25 °C (67,8 and 62,6%). This study showed that isolate of M. anisopliae has virulent and highly potential for biological control on nymphs of Myzocallis coryli.

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