烟草钾营养对Q型烟粉虱发育、存活和寄主选择性的影响
The effects of potassium levels in tobacco plants on the development, survival and host selectivity of Q-biotype Bemisia tabaci (Gennadius)
金 鹏1 林华峰1** 李 毅1 李茂业1 陈德鑫2
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DOI：
作者单位：1. 安徽农业大学植物保护学院 合肥 230036; 2. 中国农业科学院烟草研究所 青岛 266101
中文关键词：烟草，钾营养，Q型烟粉虱，发育，存活率，选择性
英文关键词：tobacco, potassium nutrition, Q-biotype Bemisia tabaci, development, survival rate, selectivity
中文摘要：
【目的】 明确烟草钾营养对Q型烟粉虱Q-biotype Bemisia tabaci（Gennadius）的寄主选择性、发育和存活的影响，旨在为通过调节寄主植物营养控制Q型烟粉虱种群数量提供理论依据。【方法】 水培法培养经K1（0 mmol/L）、K2（3 mmol/L）、K3（6 mmol/L）、K4（9 mmol/L）及K5（12 mmol/L）5个不同钾浓度处理的烟草，研究Q型烟粉虱在不同处理烟草上的寄主选择性、发育历期和存活率。【结果】 Q型烟粉虱在不同钾浓度处理烟草上的寄主选择性、发育历期和存活率均有显著差异，取食和产卵偏好性顺序为K2>K1>K3>K4>K5，卵到成虫羽化发育历期顺序为K5（22.54 d）>K4（2 1.96 d）>K1（20.92 d）>K2（20.32 d）>K3（20.23 d），卵到成虫羽化存活率顺序为K3（88.72%）>K2（85.05%）>K1（82.03%）>K4（77.02%）>K5（69.92%）。【结论】 可以通过调节钾营养来控制Q型烟粉虱在烟草上的种群数量。
英文摘要：[Objectives] In order to provide a theoretical foundation for the control of Q-biotype Bemisia tabaci by regulating the nutrition of its host plant, the effects of potassium levels in tobacco plants on host selection, development and survival rate of Q-biotype B. tabaci were examined. [Methods] The host selection, development and survival rate of Q-biotype B. tabaci were investigated on water-cultured tobacco plants provided with five different concentrations of potassium: K1 (0 mmol/L), K2 (3 mmol/L), K3 (6 mmol/L), K4 (9 mmol/L) and K5 (12 mmol/L). [Results] Host preference, developmental duration and survival rate of Q-biotype B. tabaci on tobacco plants treated with different concentrations of potassium were significantly different. Relative feeding and oviposition preferences were K2>K1>K3>K4>K5, while the length of developmental duration from egg to adult on different plants was K5 (22.54 d)>K4 (21.96 d)>K1 (20.92 d)>K2(20.32 d)>K3 (20.23 d). Survival rates from egg to adult on different plants were K3 (88.72%)>K2(85.05%)> K1 (82.03%)> K4 (77.02%)> K5 (69.92%). [Conclusion] Q-biotype B. tabaci populations can be managed by regulating the potassium content of tobacco plants.