Reeves Laura A, Garratt Michael P D, Fountain Michelle T, Senapathi Deepa
Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, Berkshire RG6 6AR UK.
NIAB, New Road, East Malling, Kent, ME19 6BJ UK.
J Insect Behav. 2023;36(3):222-238. doi: 10.1007/s10905-023-09836-5. Epub 2023 Jul 7.
is the dominant predator of pear sucker () in the UK. migrates into orchards in spring or is introduced as a biocontrol agent, reaching peak population levels in July-August, contributing to effective control of summer pear sucker populations. However, due to temperature dependent development and metabolism there are concerns that populations or feeding rates may increase due to changing climatic conditions. Thus, how responds to temperature, impacts its ability as a biocontrol agent. Functional response assays, monitoring attack rate and handling time of and behavioral assays, using Ethovision tracking software occurred, to assess the impact of temperature on predation. Experiments were conducted at current and future July-August mean temperatures, predicted using RCP4.5 and RCP8.5 (medium and high, representative concentration pathway) emissions scenarios, using 2018 UK Climate Projections (UKCP18). All treatments demonstrated a Type II functional response, with female anthocorids demonstrating shorter handling times and higher attack rates than males. Males showed longer prey handling times at 18 °C compared to 23 °C and more time was spent active at lower temperatures for both sexes. Females did not show significant differences in attack rate or handling time in response to temperature. Overall prey consumption was also not significantly affected by temperature for either sex. This study suggests that anthocorids are likely to remain effective natural enemies under future predicted temperatures, due to non-significant differences in prey consumption.
The online version contains supplementary material available at 10.1007/s10905-023-09836-5.
在英国，[某种昆虫名称]是梨木虱的主要捕食者。它在春季迁入果园或作为生物防治剂被引入，7月至8月种群数量达到峰值，有助于有效控制夏季梨木虱种群数量。然而，由于其发育和新陈代谢受温度影响，人们担心气候变化可能导致[某种昆虫名称]种群数量或取食率增加。因此，[某种昆虫名称]对温度的反应如何，会影响其作为生物防治剂的能力。进行了功能反应试验，监测[某种昆虫名称]的攻击率和处理时间，并使用Ethovision跟踪软件进行行为试验，以评估温度对捕食的影响。实验在当前以及未来7月至8月的平均温度下进行，这些温度是使用RCP4.5和RCP8.（中等和高代表性浓度路径）排放情景，并依据2018年英国气候预测（UKCP18）预测得出的。所有处理均表现出II型功能反应，雌性小花蝽的处理时间比雄性短，攻击率比雄性高。与23°C相比，雄性在18°C时猎物处理时间更长，且两性在较低温度下活动时间更多。雌性的攻击率和处理时间在温度变化时未表现出显著差异。总体而言，温度对两性的猎物消耗量也没有显著影响。这项研究表明，由于猎物消耗量没有显著差异，在未来预测温度下，小花蝽可能仍将是有效的天敌。
在线版本包含可在10.1007/s10905 - 023 - 09836 - 5获取的补充材料。
