A survey on virulence of different isolates of Metarhizium anisopliae for biological control of Hyalomma marginatum nymphal stage

According to the development of resistant in different insects and tick vector against different chemical pesticides, there is a tendency using natural and healthy products as pesticides worldwide. Then the problem of tick control is an important matter so, there is a need to use biological control method as an alternative or as complementary method in control programs of ticks. This study was planned to use the effect of four different strains of Metarhizium anisopliae on nymphal stage of laboratory bred Hyalomma marginatum as biological control. Then, 450 nymphal stage have been used in test and control group. It was shown that different isolates of fungi (Metarhizium anisopliae) have had different virulence and M14 isolate was the most virulent isolates. There was a significant difference between data test and control groups (P