The Study Of Population Dynamics Of Dominant Leafhoppers In Cereal Fields In Shahrekord Province

In this study population dynamics of dominant leafhoppers of Shahrekord cereal fields in Chaharmahal va Bakhtiyari in four fields was evaluated in a randomized complete block design. Among all fields’ leafhoppers P. alienus had the highest average abundance and E. decipiens had the lowest average abundance between dominant leafhoppers. Leafhopper M. laevis in early-sowing wheat field two peaks of population activity in fourth week of October and fourth week of April respectively were obseved, in late-sowing wheat field one peak of population activity in second week of July, in barley field one peak of population activity in third week of June and in maize field one peak of population activity in first week of July were recorded. Leafhopper P. alienus in early-sowing wheat field three peaks of population activity in first week of November, third week of April and fourth week of June respectively, in late-sowing wheat field one peak of population activity in first week of July, in barley field one peak of population activity in second week of July and in maize field two peaks of population activity in second week of July and third week of September respectively were recorded. Results showed that in late-sowing wheat field, leafhoppers because of cold winter could not settled in this field and were not observed until the end of overwintering. Planting of wheat in early to mid-November can prevent infection by leafhoppers population and thus reduces more damage to crop and decreases viral diseases.