室内条件下以枣树为寄主的苹褐带卷蛾的生长发育、繁殖及对产卵基质的选择性

【目的】苹褐带卷蛾Adoxophyes orana在陕北红枣种植区对枣树Ziziphus jujube的危害有逐年加重的趋势。本研究旨在明确以枣树为寄主的苹褐带卷蛾发育历期、繁殖能力及雌虫对产卵基质的选择性,为准确预测、高效治理该虫提供理论依据。【方法】在室温25±1℃、相对湿度70%±5%、光周期15L∶9D的条件下,以枣树叶片为食料,观察苹褐带卷蛾实验种群的生长发育及繁殖能力;通过测定补充不同营养物质后雌蛾的单雌产卵量,评价外源营养对苹褐带卷蛾繁殖力的影响;通过观察苹褐带卷蛾雌蛾在硫酸纸、滤纸、白纸、PE保鲜膜及装订胶片5种基质上的总落卵量,确定其对无机产卵基质的选择性。【结果】苹褐带卷蛾卵、幼虫、蛹和成虫的平均发育历期分别为7.38±1.22, 16.59±2.16, 7.01±0.79和16.65±5.15 d,平均世代历期为33.87±3.64 d。苹褐带卷蛾在枣树上的内禀增长率(rm)、周限增长率(λ)和种群加倍时间(Dt)分别为0.15 d^-1,1.16 d^-1和4.67 d,平均产卵量达339.52±129.93粒/雌。雌虫可多次产卵,表现出明显的昼夜节律(多在0:00-8:00时段内);平均产卵次数6.26±2.09次,雌虫羽化后第3-5天达到产卵盛期。雌蛾在PE保鲜膜上的总落卵量显著大于在其他产卵基质上的总落卵量。补给不同浓度白糖水的雌蛾,其产卵量与补给纯净水的雌蛾的产卵量差异不显著。【结论】苹褐带卷蛾能够以枣树叶片为食物完成发育并繁殖可育后代,PE保鲜膜是其雌蛾适宜的无机产卵基质。

Development,reproduction, and oviposition substrate selection of the summerfruit tortrix,Adoxophyes orana (Lepidoptera: Tortricidae), with jujube as the host under indoor conditions

【Aim】 An increasing damage of the summer fruit tortrix moth, Adoxophyes orana, has been observed on jujube (Ziziphus jujube) in jujube growing regions of Northern Shaanxi in recent years. This study aims to clarify the developmental duration, fecundity and oviposition substrate selection of this jujube pest, so as to provide a theoretical reference for its prediction and prevention. 【Methods】 The growth, development and reproduction of A. orana feeding on jujube leaves were observed under the conditions of 25±1℃, 70%±5% RH and a photoperiod of 15L∶9D. The effects of supplementary nutrition on the reproduction of A. orana were assessed by measuring the fecundity per female moth when supplemented with different nutrients. The oviposition preference of female adults of A. orana to five substrates, including parchment paper, filter paper, white paper, polyethylene (PE) preservative film and plastic binding film, was investigated by counting the number of accumulated eggs on different substrates. 【Results】 The duration of egg, larval, pupal, and adult stages of A. orana was 7.38±1.22, 16.59±2.16, 7.01±0.79, and 16.65±5.15 d, respectively. The mean generation duration was 33.87±3.64 d. The intrinsic rate of increase (r_m), finite rate of increase (λ) and population doubling time (D_t) were 0.15 d^-1, 1.16 d^-1 and 4.67 d, respectively. The average fecundity of adult was 339.52±129.93 eggs laid per female. The female adults of A. orana oviposit eggs multiple times (6.26±2.09 on average), showing an obvious circadian rhythm (most in 0:00-8:00). The peak oviposition appeared at 3-5 d after emergence. The total fecundity on PE preservative film was significantly higher than that on the other substrates. There was no significant difference in the total fecundity between the female adults fed with sugar solution at different concentrations and those fed with water. 【Conclusion】 A. orana feeding on jujube leaves can accomplish its development and reproduce fertile offspring, and PE preservative film is the suitable inorganic oviposition substrate for its female moths.