Affiliation:
1. School of Life Science, Institutes of Life Science and Green Development, Hebei University, Baoding 071002, China
2. Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
3. School of the Environment, The University of Queensland, Brisbane 4072, Australia
Abstract
The Fall Armyworm, Spodoptera frugiperda (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 S. frugiperda 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 S. frugiperda. 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.
Funder
Shandong Province “Double-Hundred Talent Plan”
Foreign Expert Teams Program
Reference54 articles.
1. Investigation of overwintering and wintering areas of fall armyworm in China;Jiang;China Plant Prot.,2021
2. Major progress in coping with the invasion of fall armyworm in China;Guo;China Plant Prot.,2022
3. Review of the host plants of fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae);Casmuz;Rev. Soc. Entomol. Argent.,2010
4. Host plants of Spodoptera frugiperda (Lepidoptera: Noctuidae) in the Americas;Montezano;Afr. Entomol.,2018
5. Understanding smallholders’ responses to fall armyworm (Spodoptera frugiperda) invasion: Evidence from five African countries;Tambo;Sci. Total Environ.,2020