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【目的】栎黄枯叶蛾Trabala vishnou gigantina是近年在沙棘Hippophae rhamnoides林中大面积暴发的一种食叶害虫,以幼虫取食叶片,导致沙棘长势衰弱甚至死亡。本研究旨在明确温度对栎黄枯叶蛾生长发育及繁殖的影响,以便对其进行预测预报及采取防治措施。【方法】分别在5个恒温(19,22,25,28和31℃)条件下研究了温度对栎黄枯叶蛾各虫态发育历期、取食量、交配率、产卵、寿命等的影响。【结果】在19~31℃温度范围内,随着温度升高,各虫态发育历期逐渐缩短。卵、幼虫、蛹、产卵前期和全世代的发育起点温度分别为9.24±0.45,10.85±0.87,14.56±0.85,9.65±0.54和10.48±0.52℃,有效积温分别为341.22±9.54,1 285.64±17.65,445.35±8.65,13.34±1.25和2 085.35±25.84日·度。幼虫总取食量和交配率与温度变化关系不大,而成虫的产卵量在22,25和28℃下明显高于其他温度,成虫寿命与温度呈负相关。【结论】22~28℃之间是栎黄枯叶蛾较为理想的生长发育和繁殖温度。研究结果为生产上合理防治该害虫提供了参考依据。
【Objective】 Trabala vishnou gigantina is a leaf-eating pest outbreak widespread in Hippophae rhamnoides forest in recent years. Larvae feed on the leaves, causing the seabuckthorn to grow weak or even die. The purpose of this study was to determine the effect of temperature on the growth and reproduction of Quercus luteus, in order to predict its occurrence and take control measures. 【Method】 The effects of temperature on the developmental stages, feeding amount, mating rate, oviposition, life span and so on were studied under five constant temperatures (19, 22, 25, 28 and 31 ℃) Impact. 【Result】 The results showed that in the temperature range of 19 ~ 31 ℃, the developmental stages of each insect state gradually shortened with the increase of temperature. The onset temperatures of eggs, larvae, pupae, pre-oviposition and all generations were 9.24 ± 0.45, 10.85 ± 0.87, 14.56 ± 0.85, 9.65 ± 0.54 and 10.48 ± 0.52 ℃, respectively. The effective accumulated temperatures were 341.22 ± 9.54 and 1 285.64 ± 17.65, 445.35 ± 8.65, 13.34 ± 1.25, and 2 085.35 ± 25.84 days. The larval total food intake and mating rate had little relation with temperature, but the adult fecundity was significantly higher than other temperatures at 22, 25 and 28 ℃, and the adult life expectancy was negatively correlated with temperature. 【Conclusion】 The temperature between 22 ℃ and 28 ℃ is the ideal growth and reproduction temperature for Quercus luteus. The results provide a reference for the reasonable prevention and control of the pest in production.