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为了明确温度对沙蒿金叶甲Chrysolina aeruginosa Faldermann生长发育和繁殖的影响,本实验在恒温条件(13,18,23,28和33℃)下,以白沙蒿Artemisia sphaerocephala Krasch为寄主植物,研究了温度对沙蒿金叶甲实验种群生长发育和繁殖的影响。结果表明:温度对沙蒿金叶甲各虫态的发育历期、存活率以及种群繁殖力显著影响。在13~28℃范围内,各虫态的发育历期均随温度的升高而缩短,发育速率与温度呈显著正相关。但是,当温度上升至33℃时,幼虫和蛹生长发育受到抑制,其幼虫发育历期与18℃,23℃和28℃下相比延长并达到了显著差异水平(P<0.05),成虫不能羽化出土;低温影响沙蒿金叶甲卵的存活率,高温影响其蛹的存活率,说明温度过高或过低均不利于沙蒿金叶甲的生长发育。成虫产卵量随环境温度变化的大小顺序为28℃>23℃>18℃>13℃,并存在极显著差异(P<0.01)。由直接最优法计算得到沙蒿金叶甲卵期、1-3龄幼虫期、4龄幼虫+蛹期的发育起点温度分别为9.72℃,7.11℃和18.77℃,有效积温依次为115.36,441.91和448.40日·度。研究结果为沙蒿金叶甲发生期的预测预报提供了基础参考数据,对指导生产实践有实际的应用意义。
In order to clarify the effect of temperature on the growth and reproduction of Chrysolina aeruginosa Faldermann, we studied the effects of temperature on the growth and reproduction of Artemisia sphaerocephala Krasch under constant temperature conditions (13, 18, 23, 28 and 33 ℃) Effect of temperature on growth, development and reproduction of Artemisia selengensis population. The results showed that the temperature significantly affected the developmental stages, survival rates and population fertility of Artemisia selengensis. In the range of 13 ~ 28 ℃, the developmental stages of all the insect states were shortened with the increase of temperature, and the developmental rates were positively correlated with the temperature. However, the growth of larvae and pupae was inhibited when the temperature was raised to 33 ℃. The larval development of larvae was prolonged and reached a significant level (P <0.05) at 18 ℃, 23 ℃ and 28 ℃, Eclosion unearthed; low temperature affect the survival rate of Artemisia lanceolata eggs, high temperature affect the survival rate of their pupae, indicating that the temperature is too high or too low are not conducive to Artemisia selengensis growth and development. The size of adult fecundity was 28 ℃> 23 ℃> 18 ℃> 13 ℃ with significant difference (P <0.01). According to the direct optimal method, the developmental threshold temperatures of A. tabulaeformis eggs were 9.72 ℃, 7.11 ℃ and 18.77 ℃, respectively. The effective accumulated temperatures were 115.36 and 441.91 And 448.40 days · degrees. The results provided the basic reference data for the prediction and prediction of Artemisia selengensis and their practical application in guiding the practice of production.