红棕象甲发育起点温度及有效积温的测定

在室内恒温条件下,观察了不同温度对棕榈红棕象甲Rhynchophorus ferrugineus Fabricius生长发育的影响,并用直线回归法测得产卵前期、卵、幼虫、蛹和全世代的发育起点温度分别为(16.11±1.44)、(14.10±0.56)、(15.28±0.21)、(14.89±0.24)和(14.15±0.54)℃;有效积温分别为(31.86±1.65)、(748.60±15.79)、(417.94±20.80)和(1215.50±28.56)日·度。红棕象甲的各虫态和全世代发育历期随温度的升高而缩短,在测定的温度范围内,全世代发育历期与温度的关系符合指数函数:y=3343e-0.1279x。

Determination on threshold temperature and effective accumulated temperature for the development of Rhynchophorus ferrugineus

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.