Abstract
Lesser mulberry pyralid, Glyphodes pyloalis Walker, is a monophagous pest of mulberry and has recently been reported from northern Iran. The effect of four varieties of mulberry Morus alba L. (Ichinose, Shin Ichinose, Kenmochi and Mahalii) on the life table parameters and biological characteristics of G. pyloalis Walker, was studied at 24±1°C, relative humidity of 75±5% and a photoperiod of 16: 8 (L: D) h. The developmental time of immature stages was longest on Kenmochi being 37.6days. The intrinsic rate of increase (rm) was significantly affected by various mulberrys being the highest on Mahalii (0.160) and the lowest on Kenmochi (0.127). The highest and lowest finite rates of increase (λ) were observed on Mahalii 1.174 and Kenmochi 1.136, respectively. The highest amount of gross reproductive rate and the lowest mean generation time (T) was observed on Mahalii. The results obtained in this study indicated that Mahalii appeared to be the most susceptible host to G. pyloalis among the tested varieties.
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