Determination on threshold temperature and effective accumulated temperature for the development of Rhynchophorus ferrugineus
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Key Words：Rhynchophorus ferrugineus, threshold temperature for development, effective accumulated temperature
Abstract： The effect of temperature on the growth and development of Rhynchophorus ferrugineus Fabricius was studied. Linear regression indicated that the threshold temperatures for preoviposition, eggs, larvae and pupae, and from preoviposition to pupation, were (16.11±1.44)， (14.10±0.56)，(15.28±0.21)，(14.89±0.24) and (14.15±0.54)℃, respectively. The effective accumulated temperature for the above stages were (31.86±1.65) degree days, (748.60±15.79) degree days，(417.94±20.80) degree days and (1215.50±28.56) degree days, respectively. The developmental duration of each developmental stage, and from preoviposition to pupation, decreased with increased temperature. The developmental duration of a single generation was fitted with the index function: y=3343e-0.1279x.