Population fluctuation of grape berry moth, Lobesia botrana Den. & Schiff (Lep., Tortricidae) and its relation to host phenology for the optimum timing control

The grape berry moth Lobesia botrana Den. & Schiff (Lep., Tortricidae), economically is one of the most significant pest of grapevine yards in Iran. This study aims to determine population fluctuation in two regions of Southern province of Iran), in 2015. At the same time, the host phenology omit, minimum and maximum temperature have been recorded. Investigations revealed that this pest has four generations in Daryon. The flight peaks of the first, second, third and fourth generations occurred in middle of April, early June, middle of July and late August, respectively. The mean cumulative degree day was 41.4, 173.95, 847.7, 1694.65, 2514.95 and with bud swelling, first and compressed blooms, bunch closure, ripe and harvest of host phenology stages, respectively .The pest in Kelestan has three generations and the flight peaks of first, second and third were observed in late April, late June and late August with the mean cumulative degree day of 22, 101, 748.5 and 1699, respectively. The host phenology stages were, bud swell, first bloom, bunch closure and ripening omit. Due to our investigation 6-8 days after second generation flight peak is on appropriate time to control grape berry moth.