Xu Yangcheng, Chi Haipeng, Shi Mingyue, Lu Zhaozhi, Zalucki Myron P
School of Life Science, Institutes of Life Science and Green Development, Hebei University, Baoding 071002, China.
Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China.
Insects. 2024 Mar 7;15(3):180. doi: 10.3390/insects15030180.
The Fall Armyworm, (Lepidoptera, Noctuidae), is a serious migratory pest. After invading China in 2019, the species was established as a year-round breeding population in most of the southern provinces. The area of winter maize in this region has been increasing due to the huge demand of fresh maize consumption, which is potentially at risk from this invasive pest, although the growth and development of in the region's changing climate is unclear, particularly with rising temperatures at night. Here, we used the highest daytime temperatures of 27 °C, 24 °C, 20 °C and decreased these by 2, 4 and 6 °C to reflect the range of nighttime temperatures indicative of winter conditions in a warming climate to evaluate the effect of increasing night temperatures on the growth and development of . Results show that the survival of larvae and pupae significantly declined with daytime temperatures declining and the nighttime temperature range increasing. Significant developmental effects were observed across all daytime-nighttime temperature treatments, except for adults. Additionally, there were significant interaction effects for all stages, except the egg stage, and generation time. The development rate increased with the increasing daytime temperatures and nighttime temperatures, except for the intermediate treatments (Group II). The uniformity of pupation and emergence times were higher under high daytime temperatures and nighttime temperature treatments. Predictions of FAW development and warnings to local farmers need to be adjusted to take into account the more rapid development when nighttime temperatures increase in the warming climate. These results will support decision makers in developing long-term management strategies for FAW in southern China.
草地贪夜蛾（鳞翅目，夜蛾科）是一种严重的迁飞性害虫。2019年入侵中国后，该物种在南方大部分省份形成了全年繁殖种群。由于鲜食玉米消费需求巨大，该地区冬玉米种植面积一直在增加，尽管该地区气候变化（尤其是夜间气温上升）对草地贪夜蛾生长发育的影响尚不清楚，但该入侵害虫可能会对冬玉米构成威胁。在此，我们采用27℃、24℃、20℃的最高日温，并分别降低2℃、4℃和6℃，以反映变暖气候下冬季夜间气温范围，从而评估夜间气温升高对草地贪夜蛾生长发育的影响。结果表明，随着日温降低和夜间温度范围增加，幼虫和蛹的存活率显著下降。除成虫外，在所有日-夜温度处理中均观察到显著的发育影响。此外，除卵期和世代时间外，所有阶段均存在显著的交互作用。发育速率随着日温和夜间温度的升高而增加，但中间处理（第二组）除外。在高日温和夜间温度处理下，化蛹和羽化时间的均匀性更高。草地贪夜蛾发育预测和对当地农民的预警需要进行调整，以考虑变暖气候下夜间气温升高时发育更快的情况。这些结果将支持决策者制定中国南方草地贪夜蛾的长期管理策略。
