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【目的】有效防控榆黄毛萤叶甲Pyrrhalta maculicollis(Mots.)在吐鲁番地区的危害。【方法】本研究在室内设置22、25、28、31和34℃5个温度梯度,分别测定榆黄毛萤叶甲各虫态的发育历期,并以有效积温法则和“最小二乘法”计算出榆黄毛萤叶甲各虫态的发育起点温度和有效积温。【结果】卵、幼虫、蛹、产卵前期及全世代的发育起点温度分别为13.83、12.64、12.48、14.63和14.01℃,有效积温分别为83.99、186.32、121.50、185.42和550.54日·度。榆黄毛萤叶甲发育速率与温度的关系分别采用线性日度模型式和Logistic曲线模型式进行拟合,建立各虫态发育速率与温度关系模型。由Lagrange中值定理求出各虫态的发育最适温度、适宜温区,其全世代的分别为:Tmid为28.23℃、Tmin为14.36℃、Tmax为42.11℃。【结论】明确了榆黄毛萤叶甲各虫态的发育起点温度及有效积温,计算出了各虫态的理论发育最适温度及适宜温区,为准确预报榆黄毛萤叶甲发生期及有效防治提供理论依据。
【Objective】 To effectively prevent and control the damage of Pyrrhalta maculicollis (Mots.) In Turpan region. 【Method】 Five temperature gradients of 22, 25, 28, 31 and 34 ℃ were set up indoors to determine the developmental duration of each worm state, and the effective temperature law and the “least square method” Calculate the developmental starting point temperature and effective accumulated temperature of each worm state of Ulmus pumila. 【Result】 The onset temperatures of eggs, larvae, pupae, pre-oviposition and all generations were 13.83, 12.64, 12.48, 14.63 and 14.01 ℃, respectively. The effective accumulated temperatures were 83.99, 186.32, 121.50, 185.42 and 550.54 days, respectively. The relationship between the growth rate and the temperature of Ulva velutinae was respectively fitted by linear daily model and Logistic curve model, and the relationship between development rate and temperature was established. According to the Lagrange median theorem, the developmental optimum temperatures of all the insect states were calculated, and the suitable temperature ranges were as follows: Tmid was 28.23 ℃, Tmin was 14.36 ℃, Tmax was 42.11 ℃. 【Conclusion】 The developmental threshold temperature and effective accumulated temperature of each insect state of Ulmus pumila were identified. The theoretical optimal temperature and suitable temperature range of each insect state were calculated. In order to accurately predict the occurrence and the effective control of Diabrotica philoxeroides, Theoretical basis.