松突圆蚧发育起点温度和有效积温的测定及其应用

采用恒温培养与林间观察相结合的方法对松突圆蚧发育的起点温度和有效积温进行测定,结果表明:松突圆蚧各虫期的发育起点温度分别为1龄若虫(6.99±0.23)℃,2龄若虫(8.74±1.06)℃,蛹期(13.08±1.56)℃,雌成虫期(9.44±1.22)℃,整个生活史(10.47±1.03)℃;有效积温分别为1龄若虫208.30℃.d,2龄若虫200.23℃.d,蛹期77.61℃.d,雌成虫期477.80℃.d,整个生活史810.87℃.d。用有效积温法估测松突圆蚧在福建省各县(市、区)和广东部分地区可能发生的世代数,估测值与实际年发生世代数基本相符,可作为松突圆蚧监测预警和防治决策的依据。

Measurement and application of developmental threshold temperatures and effective cumulative temperatures of Hemiberlesia pitysophila Takagi

The developmental threshold temperatures and effective cumulative temperatures in the Hemiberlesia pitysophila Takagi were measured using a combination of constant temperatures feeding and forest observation.The results showed that: The threshold temperatures for the development of the first instar nympha,the second instar nympha,the pupa and the female adult were(6.99±0.23) ℃,(8.74±1.06) ℃,(13.08±1.56) ℃,(9.44±1.22) ℃,respectively.The effective cumulative temperatures for the development of the first instar nympha,the second instar nympha,the pupa and the female adult were 208.30 ℃·d,200.23 ℃·d,77.61 ℃·d,477.80 ℃·d,respectively.And 810.87 ℃·d were needed to complete one generation(10.47±1.03) ℃.The one-year’s generation number of the scale in various counties of Fujian province and Guangdong province were evaluated using the method of effective cumulative temperatures principle.The results were proved to be consistent with the facts reported,so our study provided a scientific basis for the forecast and control of this insect.