Article
Entomology
Jian-Zhao Jiang, Bo-Yu Huang, Qian Wu, Shi-Yu Li, Jun Gu, Li-Hua Huang
Summary: A rapid identification method based on PCR-RFLP was developed to distinguish the two strains of FAW and other lepidopteran pests. The unique digestion patterns of four species, including FAW, were revealed by sequencing their mitochondrial COI genes. Furthermore, a specific SNP site was found in the corn strain FAW, allowing its distinction from the rice strain. Testing 28 FAW samples collected from different locations and host plants in China confirmed the presence of the corn strain only, indicating that the rice strain has not invaded China yet. This method enables differentiation of FAW from other lepidopteran pests and identification of the two FAW host strains.
JOURNAL OF ECONOMIC ENTOMOLOGY
(2023)
Article
Environmental Sciences
Ahmed A. A. Aioub, Ahmed S. S. Hashem, Ahmed H. H. El-Sappah, Amged El-Harairy, Amira A. A. Abdel-Hady, Laila A. A. Al-Shuraym, Samy Sayed, Qiulan Huang, Sarah I. Z. Abdel-Wahab
Summary: This study identified and characterized GST genes in the fall armyworm S. frugiperda and evaluated the toxicity of emamectin benzoate (EBZ) and chlorantraniliprole (CHP) on the larvae. A total of 31 GST genes were identified, and SfGSTe10 and SfGSTe13 showed the highest expression after EBZ and CHP treatments. Molecular docking analysis revealed high binding affinity between EBZ and CHP with SfGSTe10 and SfGSTe13. These findings provide important insights into the detoxification processes of S. frugiperda regarding EBZ and CHP.
Article
Biochemistry & Molecular Biology
Ying Cheng, Peng Wang, Yuxiao Zeng, Wenwen An, Tao Wang, Yutao Xiao
Summary: Researchers knocked out five pigment metabolism-related genes using the CRISPR/Cas9 system and identified two genes (Sfebony and Sfscarlet) that play important roles in body and compound eye coloration in fall armyworm. These genes could potentially serve as visual markers for genetics-based pest management strategies in non-model insects.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Agronomy
Fernando Elias Oliveira Padovez, Rubens Hideo Kanno, Celso Omoto, Aline Sartori Guidolin
Summary: The study revealed that there was no fitness cost associated with chlorantraniliprole resistance in the Spodoptera frugiperda strain with the near-isogenic background. On the other hand, a significant fitness cost was detected in the strain with a different genetic background. This suggests that the genetic background of resistant strains plays a crucial role in determining fitness costs.
PEST MANAGEMENT SCIENCE
(2022)
Article
Entomology
Nimra Altaf, Atif Idrees, Muhammad Irfan Ullah, Muhammad Arshad, Ayesha Afzal, Muhammad Afzal, Muhammad Rizwan, Jun Li
Summary: The fall armyworm is a polyphagous insect pest, preferring maize but also able to complete its life cycle on sorghum and wheat. Rice is a non-preferred host plant for fall armyworm. Larval diets significantly impact development time, fecundity, and survival rates of the insect. Maize is found to be the most suitable diet for fall armyworm based on the study's findings.
Article
Environmental Sciences
Barbara M. M. Castro, Joyce R. Santos-Rasera, Dejane S. Alves, Rosangela C. Marucci, Geraldo A. Carvalho, Hudson W. P. Carvalho
Summary: The study evaluated the effects of nano-CeO2 on the biological and nutritional characteristics of Spodoptera frugiperda, showing negative impacts on pupal weight, egg viability, and nutritional parameters. Cerium was detected in the insect's body, even without direct exposure via artificial diet, causing reductions in pupal weight. Further ecotoxicological studies in semi-field and field conditions are needed to confirm the toxicity of nano-CeO2 on S. frugiperda.
ENVIRONMENTAL POLLUTION
(2021)
Article
Biochemistry & Molecular Biology
Haixiang Lv, Shanshan Ling, Zhimin Guo, Chengfeng Zheng, Huina Ma, Jianhong Li, Kangsheng Ma
Summary: This study assessed the toxicity of lufenuron on Spodoptera frugiperda and evaluated its effects on the growth and development of the insects. The results showed that lufenuron has high insecticidal activity against S. frugiperda and can significantly prolong the larval developmental duration and reduce the rates of pupation and emergence. Gene expression analysis revealed that lufenuron treatment can significantly reduce the expression of SfCHT gene, while the expression of SfCHS gene remained relatively stable. Moreover, lufenuron strongly interacted with chitinase and chitin synthase enzymes.
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
(2023)
Article
Entomology
Johnnie Van den Berg, Hannalene du Plessis
Summary: This paper reviews the history of insecticide resistance in the fall armyworm and discusses the factors that influence control efficacy and resistance evolution, such as life history traits, migration ecology, and chemical control practices. The indirect impact of national policies on pesticide use and control efficacy is also examined, highlighting the importance of integrated pest management.
JOURNAL OF ECONOMIC ENTOMOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Sandra Nhim, Sylvie Gimenez, Rima Nait-Saidi, Dany Severac, Kiwoong Nam, Emmanuelle D'Alencon, Nicolas Negre
Summary: This study presents the first genome-wide ChIP-Seq analysis of H3K9me2 in S. frugiperda. Compared to model organisms, this mark is found in expected chromosomal compartments such as rDNA and telomeres. However, it is also localized at numerous dispersed regions, instead of the well described large pericentromeric domains, indicating that H3K9me2 might not represent a classical heterochromatin marker in Lepidoptera.
Article
Agronomy
Zhuo-Kun Liu, Xue-Lin Li, Xiao-Feng Tan, Mao-Fa Yang, Atif Idrees, Jian-Feng Liu, Sai-Jie Song, Jian Shen
Summary: This study determined the lethal concentration of emamectin benzoate (EMB) on the fall armyworm (FAW) and assessed its sublethal effects on parental and offspring generations. Sublethal concentrations of EMB significantly influenced the life cycle and reproduction characteristics of FAW. These findings have important implications for the rational use of FAW insecticides.
Article
Entomology
Yi-Ping Gao, Mei Luo, Xiao-Yun Wang, Xiong Zhao He, Wen Lu, Xia-Lin Zheng
Summary: This study tested the pathogenicity of Beauveria bassiana PfBb on the agricultural pest Spodoptera frugiperda by evaluating the activities of protective enzymes and detoxifying enzymes in different larval instars. The results showed that B. bassiana PfBb could infect all six larval instars of S. frugiperda, and its virulence increased with the concentration of spores. Additionally, the activities of protective enzymes and detoxifying enzymes in the first three instars changed significantly with infection time, while such variations were not obvious in the fifth and sixth instars.
Article
Entomology
Wen-Hua Chen, Brandon Itza, Lekhnath Kafle, Tsui-Ying Chang
Summary: This study examined the impact of two grasses (napier and natal grass) and one legume (sunn hemp) crop on the population growth of the fall armyworm, a lepidopteran pest. The findings showed that the alternative host plants significantly influenced the development and reproduction of the pest. Sunn hemp was identified as a more suitable host plant, while natal grass was less suitable. The results imply that all alternative host plants can support the growth and development of the pest in the absence of the main host.
Article
Agronomy
Raman Gopalakrishnan, Vinay Kumari Kalia
Summary: This study evaluated the biological parameters of fall armyworm on four different hosts and semi-synthetic diet, revealing that maize had the shortest life cycle for males, semi-synthetic diet showed superior fecundity and weights compared to natural hosts, and cotton was the least preferred host with a longer life cycle. The results will be useful for formulating management strategies for fall armyworm.
PEST MANAGEMENT SCIENCE
(2022)
Article
Multidisciplinary Sciences
Mohammad Vatanparast, Youngjin Park
Summary: The fall armyworm is one of the most destructive insect pests in the world, and it has invaded Africa and spread to Asia within two years. Glycerol has been found to play a crucial role in the rapid cold hardening process, and the genes GPDH and GK are associated with glycerol synthesis. RNA interference of these genes resulted in a decrease in survival rate in the fall armyworm larvae. After a cold period, an increase in glycerol accumulation was observed. This research highlights the importance of glycerol as a cryoprotectant for the survival of this quarantine pest during the cold period.
SCIENTIFIC REPORTS
(2022)
Article
Microbiology
Ingrid Zanella-Saenz, Elisabeth A. Herniou, Jorge E. Ibarra, Ilse Alejandra Huerta-Arredondo, Ma Cristina Del Rincon-Castro
Summary: Fall armyworm (FAW) is an economically important agricultural pest. This study evaluated six baculovirus strains isolated from infected FAW larvae and found differences in their virulence. In addition, in vitro and genomic analyses were conducted to further understand their potential as biological control agents.
ARCHIVES OF MICROBIOLOGY
(2022)