Shi Fan, Ma Xu, Lin Chang-Jin, Gao Xiao-Han, Wang Xing-Yu, Kuang Yang-Fan, Wang Lin-Lin, Li Shitang, Lin Changlu, Chen Li-Lin
State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, College of Plant Protection, Fuzhou, Fujian 350002, China.
Institute of China White Tea, Fuding, Fujian 355200, China.
J Econ Entomol. 2024 Feb 12;117(1):230-239. doi: 10.1093/jee/toad208.
Ectropis grisescens Warren is one of the most important pests of tea plants. In this study, data on the development, survival, and fecundity of E. grisescens were collected at 15, 22, and 32 °C and analyzed by using the age-stage, two-sex life table. At 15 °C, the duration of the preadult period of E. grisescens was significantly prolonged (81.06 days), with high mortality (69.0%), and the proportion of emerged female adults was extremely low (7.0%). At 32 °C, the preadult period was significantly shortened (29.12 days), with high preadult mortality (74.0%), and a low proportion of emerged female adults (15.0%). At 22 °C, with low preadult mortality (24.0%), and a high proportion of emerged female adults (26.0%). The overall effects of the shorter preadult duration, higher preadult survival rate, higher proportion of emerged female adults, higher fecundity (F = 350.88 eggs/♀), and higher net reproductive rate (R0 = 91.23 offspring/individual) at 22 °C resulted in the highest values of the intrinsic rate of increase (r = 0.1054 days-1) and finite rate of increase (λ = 1.1112 days-1). Computer simulation showed that E. grisescens populations can increase much faster at 22 °C than at 15 and 32 °C. The weighted population size and cumulative weighted insect-days provided the dynamics necessary for estimating the damage potential of E. grisescens in devising economical pest management programs. Our results demonstrate that populations of E. grisescens were able to develop at a broad range of temperatures and adapt to the high temperatures. These finding can be utilized to improve the management of E. grisescens.
茶尺蠖是茶树最重要的害虫之一。在本研究中，在15℃、22℃和32℃下收集了茶尺蠖的发育、存活和繁殖数据，并采用年龄-龄期两性生命表进行分析。在15℃时，茶尺蠖的成虫前期显著延长（81.06天），死亡率高（69.0%），羽化雌成虫比例极低（7.0%）。在32℃时，成虫前期显著缩短（29.12天），成虫前期死亡率高（74.0%），羽化雌成虫比例低（15.0%）。在22℃时，成虫前期死亡率低（24.0%），羽化雌成虫比例高（26.0%）。22℃下成虫前期持续时间较短、成虫前期存活率较高、羽化雌成虫比例较高、繁殖力较高（F = 350.88粒卵/♀）和净生殖率较高（R0 = 91.23头后代/个体）的综合影响导致内禀增长率（r = 0.1054天-1）和周限增长率（λ = 1.1112天-1）达到最高值。计算机模拟表明，茶尺蠖种群在22℃时的增长速度比在15℃和32℃时快得多。加权种群数量和累积加权虫日为在制定经济害虫管理计划时估计茶尺蠖的潜在危害提供了必要的动态信息。我们的结果表明，茶尺蠖种群能够在广泛的温度范围内发育并适应高温。这些发现可用于改进茶尺蠖的管理。
