Yang Wen-Qin, Li Xian, Meng Fan-Xin, Liu Tong-Xian, Zhang Shi-Ze
State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on Crops in Northwestern Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling, China.
Institute of Entomology, College of Agriculture, Guizhou University, Guiyang, China.
J Econ Entomol. 2025 Jun 13;118(3):1133-1145. doi: 10.1093/jee/toaf083.
The indigenous parasitoid Cotesia ruficrus (Haliday) (Hymenoptera: Braconidae) shows promise as a biological control agent for managing the invasive fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) in China. However, the influence of environmental factors on C. ruficrus performance remains poorly understood. This study aimed to investigate the effects of temperature, relative humidity, and photoperiod on the life history of C. ruficrus. The life-history traits were measured at 5 different temperatures (20, 23, 26, 29, and 32 ± 1 °C), 4 RH levels (40%, 55%, 70%, and 85 ± 5%), and 5 photoperiod levels (L:D 8:16, 10:14, 12:12, 14:10, and 16:8). As temperature increased from 20 to 32 °C, the immature developmental duration (from 19.8 to 11.0 d), egg load (from 263.8 to 100.8), adult size (from 0.75 and 0.72 to 0.66 and 0.65 mm for female and male, respectively), and longevity (from 28.43 and 24.98 to 5.03 and 5.3 d for female and male, respectively) significantly reduced, while parasitism rates remained stable (56.8% to 66.3%) but emergence rates decreased above 26 °C (from 93% to 75%). Higher RH (>70%) improved emergence rates (87% to 93%), sex ratios (0.63), egg load (278), and longevity (above 10 d for male and 14 d for female), with no significant effect on parasitism rates (65% to 69%). The highest parasitism rate (65%), sex ratio (0.63), and egg load (278) occurred under 14:10 photoperiod, with emergence rates (81% to 87%) unaffected by photoperiod changes. Collectively, optimal conditions for C. ruficrus development and reproduction were identified as 26 ± 1 °C temperature, 14:10 photoperiod, and above 70% RH.
本土寄生蜂微红盘绒茧蜂（哈利迪）（膜翅目：茧蜂科）有望成为一种生物防治剂，用于治理中国的入侵害虫草地贪夜蛾，即史密斯夜蛾（鳞翅目：夜蛾科）。然而，环境因素对微红盘绒茧蜂性能的影响仍知之甚少。本研究旨在调查温度、相对湿度和光周期对微红盘绒茧蜂生活史的影响。在5个不同温度（20、23、26、29和32 ±1°C）、4个相对湿度水平（40%、55%、70%和85±5%）以及5个光周期水平（光照：黑暗 = 8:16、10:16、12:12、14:10和16:8）下测量生活史特征。随着温度从20°C升高到32°C，未成熟发育历期（从19.8天到11.0天）、产卵量（从263.8粒到100.8粒）、成虫大小（雌性从0.75和0.72毫米分别降至0.66和0.65毫米，雄性同理）以及寿命（雌性从28.43天和24.98天分别降至5.03天和5.3天，雄性同理）显著降低，而寄生率保持稳定（56.8%至66.3%），但在26°C以上羽化率下降（从93%降至75%）。较高的相对湿度（>70%）提高了羽化率（87%至93%）、性别比（0.63）、产卵量（278粒）和寿命（雄性超过10天，雌性超过14天），对寄生率没有显著影响（65%至69%）。在14:10光周期下寄生率最高（65%）、性别比（0.63）和产卵量（278粒）最高，羽化率（81%至87%）不受光周期变化的影响。总体而言，微红盘绒茧蜂发育和繁殖的最佳条件确定为温度26±1°C、光周期14:10以及相对湿度高于70%。
