Tuan Shu-Jen, Lee Chung-Chieh, Chi Hsin
Department of Entomology, National Chung Hsing University, Taichung, Taiwan, Republic of China.
Pest Manag Sci. 2014 May;70(5):805-13. doi: 10.1002/ps.3618. Epub 2013 Aug 19.
The common cutworm, Spodoptera litura (Fabricus), is the most serious pest of peanuts in Taiwan. In order to devise an ecology-based and cost-effective control program, we collected life table data and consumption rates from larvae reared indoors at a constant temperature of 25°C, or outdoors at ambient temperatures during the spring and fall of 2010. A computer simulation was then used to project the population growth and damage potential of S. litura on peanuts.
Laboratory-reared S. litura individuals produced 3548 eggs/female, whereas those reared outdoors produced 3452 and 3072 eggs/female in the spring and fall, respectively. The intrinsic rate of increase was 0.1828, 0.1308 and 0.1545 day(-1), and the net consumption rate was 194.0, 132.2 and 166.6 cm(2) larva(-1) at 25°C, in spring and fall, respectively. Population projection showed a faster growth and higher damage potential of S. litura in the fall.
Population projections based on life tables and stage-specific consumption rates can reveal the stage structure and damage potential of the pest population. Our results showed that monitoring data obtained by using pheromone traps were not in concordance with the damage potential of the pest population. This approach offers a promising tool for pest management.
斜纹夜蛾（Spodoptera litura (Fabricus)）是台湾花生最严重的害虫。为了制定基于生态学且具有成本效益的防治方案，我们收集了在25°C恒温室内饲养或在2010年春秋季室外环境温度下饲养的幼虫的生命表数据和取食率。然后使用计算机模拟来预测斜纹夜蛾在花生上的种群增长和危害潜力。
实验室饲养的斜纹夜蛾个体每雌产卵3548粒，而春季和秋季室外饲养的分别为每雌产卵3452粒和3072粒。内禀增长率分别为0.1828、0.1308和0.1545天⁻¹，净取食率在25°C、春季和秋季分别为194.0、132.2和166.6平方厘米幼虫⁻¹。种群预测表明，秋季斜纹夜蛾的生长更快，危害潜力更高。
基于生命表和特定龄期取食率的种群预测可以揭示害虫种群的龄期结构和危害潜力。我们的结果表明，使用性诱捕器获得的监测数据与害虫种群的危害潜力不一致。这种方法为害虫管理提供了一个有前景的工具。
