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A Temperature-Dependent Phenology Model for the Greenhouse Whitefly Trialeurodes vaporariorum (Hemiptera: Aleyrodidae).
Virus Research ( IF 5 ) Pub Date : 2020-08-13 , DOI: 10.1016/j.virusres.2020.198107
Heidy Gamarra 1 , Marc Sporleder 1 , Pablo Carhuapoma 1 , Jürgen Kroschel 1 , Jan Kreuze 1
Affiliation  

The greenhouse whitefly Trialeurodes vaporariorum Westwood (Hemiptera: Aleyrodidae) is a serious pest of many fruits, vegetables and ornamental crops in sub-tropical regions and in greenhouses worldwide. Potato is a secondary host of the species but the major threat from this insect in the Andean region for potato is the transmission by this insect of a crinivirus causing Potato yellow vein disease. Determination of the pest’s temperature-dependent population growth potential is crucial knowledge for understanding the population dynamics and spread potential of the species and the diseases it can transmit, as well as for designing effective pest management strategies. Trialeurodes vaporariorum development, mortality and reproduction were studied at seven constant temperatures ranging from 10 to 32 °C. The Insect Life Cycle Modeling (ILCYM) software was used to fit nonlinear equations to the data and establish an overall phenology model to simulate life-table parameters based on temperature. In addition, life tables of T. vaporariorium were established at daily fluctuating temperature in two different environments: Cusco (5 °C–35 °C) and La Molina, Lima (13.7 °C–24.9 °C), and used to adjust and validate the model. The insect only completed its life cycle at constant temperatures above 15 °C and below 32 °C although the cycle was completed at daily fluctuating temperatures between 5 °C and 35 °C. The overall model portrayed population development within the temperature range of 14° to 32 °C with a maximum finite rate of population increase (= 1.14) at 23 °C. However, the model revealed poor convergence with life tables established at fluctuating temperatures indicating an influential effect of temperature fluctuations on the whitefly life history parameters, particularly on adult survival time and reproduction. Therefore, we adjusted the model for convergence with a single life table observed at fluctuating temperature. The adjusted model gave good predictions when compared with remaining observed life tables and published data. The adjusted model predicted population development within the temperature range of 11.5 °C–35.5 °C, and maximum population growth at around 24 °C with a finite rate of increase, λ, of 1.137 and a population doubling time of 5 days. The established process-based physiological model presented here for T. vaporariorum can be used for predicting the species distribution potential based on temperature worldwide and should prove helpful in adjusting pest management measures. Moreover, the information obtained will be used to predict the spread potential of potato yellow vein disease.



中文翻译:

温室粉虱 Trialeurodes vaporariorum(半翅目:粉虱科)的温度相关物候模型。

温室粉虱Trialeurodes vaporariorum Westwood (Hemiptera: Aleyrodidae) 是全球亚热带地区和温室中许多水果、蔬菜和观赏作物的严重害虫。马铃薯是该物种的次要宿主,但这种昆虫在安第斯地区对马铃薯的主要威胁是这种昆虫传播引起马铃薯黄脉病的 crinivirus。确定害虫的温度依赖性种群增长潜力是了解物种的种群动态和传播潜力及其可能传播的疾病以及设计有效的害虫管理策略的关键知识。汽绿粉虱在 10 至 32 °C 的七个恒定温度下研究了发育、死亡率和繁殖。昆虫生命周期建模 (ILCYM) 软件用于将非线性方程拟合到数据并建立整体物候模型以模拟基于温度的生命表参数。此外,T.vaporariorium 的生命表在两种不同环境中的每日波动温度下建立:库斯科(5°C–35°C)和利马拉莫利纳(13.7°C–24.9°C),并用于调整和验证模型。昆虫仅在高于 15°C 和低于 32°C 的恒温下完成其生命周期,尽管该周期是在每天 5°C 至 35°C 之间波动的温度下完成的。整体模型描绘了 14°C 至 32°C 温度范围内的人口发展,在 23°C 时人口增长的最大有限速率 (= 1.14)。然而,该模型显示与在温度波动下建立的生命表的收敛性较差,表明温度波动对粉虱生活史参数有影响,特别是对成虫存活时间和繁殖的影响。所以,我们用在波动温度下观察到的单一寿命表调整了模型的收敛性。与剩余的观察寿命表和已发布的数据相比,调整后的模型给出了良好的预测。调整后的模型预测了 11.5 °C–35.5 °C 温度范围内的人口发展,以及在 24 °C 附近以有限的增长率实现最大人口增长,λ为 1.137,种群倍增时间为 5 天。此处为T.vaporariorum建立的基于过程的生理模型可用于根据全球温度预测物种分布潜力,并有助于调整害虫管理措施。此外,获得的信息将用于预测马铃薯黄脉病的传播潜力。

更新日期:2020-09-30
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