Physiological and Environmental Influences on Wingbeat Frequency of Oriental Armyworm,Mythimna separata(Lepidoptera: Noctuidae) DOI
Ruibin Xu,

Shishuai Ge,

Wenhua Yu

et al.

Environmental Entomology, Journal Year: 2022, Volume and Issue: 52(1), P. 1 - 8

Published: Nov. 29, 2022

Abstract The oriental armyworm, Mythimna separata (Walker, 1865) (Lepidoptera: Noctuidae), is a serious global migratory insect pest of grain crops. Although its biology has been studied for long history, the factors affecting wingbeat frequency (WBF), which closely related to flight activity insect, remain unclear. In this study, WBFs both cultured and migrating moths were tested under different conditions in laboratory using stroboscope. results indicated that age mating status significantly influenced WBF. One day old adults had lowest WBF, unmated females higher WBF than mated females. general, males was female individuals. decreased gradually with increasing environmental humidity, significant negative binomial regression relationship temperature change. fed on hydromel much those controls water or without diet. However, wind speed air pressure no effects moth test environments. These findings provide deeper understanding affect ability M. separata, will be helpful developing regional monitoring warning system pest, such as identifying target species based from radar observation.

Language: Английский

Insecticidal Effects of Transgenic Maize Bt-Cry1Ab, Bt-Vip3Aa, and Bt-Cry1Ab+Vip3Aa against the Oriental Armyworm, Mythimna separata (Walker) in Southwest China DOI Creative Commons
Zhenghao Zhang,

Xianming Yang,

Wen‐Hui Wang

et al.

Toxins, Journal Year: 2024, Volume and Issue: 16(3), P. 134 - 134

Published: March 4, 2024

The oriental armyworm, Mythimna separata (Walker), an important migratory pest of maize and wheat, is posing a severe threat to production in Asian countries. As source areas spring–summer emigratory populations, the control M. southwestern China great significance for East production. To assess toxicity Bt against pest, bioassays Bt-(Cry1Ab+Vip3Aa) (event DBN3601T), Bt-Cry1Ab DBN9936), Bt-Vip3Aa DBN9501) were conducted Yunnan province southwest China. There significant differences insecticidal activity between three events, DBN3601T presented highest role. results also indicated that effect various tissues took order leaf > kernel silk, which highly consistent with expression amounts protein (69.69 ± 1.18 μg/g), (11.69 0.75 silk (7.32 0.31 μg/g). In field trials, all larval population densities, plant damage rates, levels significantly lower than conventional maize. This research event had high efficiency could be deployed management separata.

Language: Английский

Citations

10
The invasive Spodoptera frugiperda (J.E. Smith) has displaced Ostrinia furnacalis (Guenée) as the dominant maize pest in the border area of southwestern China DOI

Yifei Song,

Xianming Yang,

Hui Li

et al.

Pest Management Science, Journal Year: 2023, Volume and Issue: 79(9), P. 3354 - 3363

Published: May 3, 2023

The invasive fall armyworm (FAW) Spodoptera frugiperda (Lepidoptera: Noctuidae) has widely colonized the tropics and subtropics of Asia. However, impact on succession Asiatic corn borer (ACB) Ostrinia furnacalis Pyralidae), a perennial dominant stemborer maize in these areas, remains elusive. Here we analyzed predation relationship, mimicked population competition, surveyed pest populations border area Yunnan (southwestern China).Laboratory assays revealed that 2nd to 6th instar larvae FAW preyed ACB, only 4th 5th ACB (1st only, 50% rate). 1st with theoretical maximum 14.5-58.8 individuals (per leaf) 4.8-25.6 tassel). When plants were infested eggs either or field cage trials, damage was 77.6% 50.6%, respectively, compared 77.9% 2.8% upon co-infestation. In surveys conducted 2019-2021, density significantly greater than which took great growth.Our findings indicate can outcompete at both individual levels, may result becoming pest. These results provide scientific basis for further analysis mechanism by invades new agricultural areas offers early-warning strategies management. © 2023 Society Chemical Industry.

Language: Английский

Citations

16
Migration Activity of Spodoptera litura (Lepidoptera: Noctuidae) between China and the South-Southeast Asian Region DOI Creative Commons

Yifei Song,

Xinzhu Cang,

Wei He

et al.

Insects, Journal Year: 2024, Volume and Issue: 15(5), P. 335 - 335

Published: May 6, 2024

The common cutworm, Spodoptera litura (F.), feeds on a wide variety of food and cash crops is one the most widespread destructive agricultural pests worldwide. Migration biological basis its regional population outbreaks but seasonal movement this pest between east south Asia regions remains unknown. In study, searchlight traps were used to monitor migration S. from 2019 2023 in Ruili City (Yunnan, China), located along insect migratory route China region. results showed that activity could occur throughout year, with main periods found spring (April–May) autumn (October–December). ovarian development mating status trapped females indicated individuals middle or late stages was transit area long-distance pest. trajectory simulation, populations moved northeast India, Bangladesh, northern Myanmar southwestern southern margin Himalayas returned region autumn. Our findings clarify patterns South facilitate cross-border monitoring management systems for

Language: Английский

Citations

4
P450 gene CYP6a13 is responsible for cross‐resistance of insecticides in field populations of Spodoptera frugiperda DOI
Yumei Chen,

Yongjie Cen,

Yü Liu

et al.

Insect Science, Journal Year: 2024, Volume and Issue: unknown

Published: May 21, 2024

Abstract Continuous and long‐term use of traditional new pesticides can result in cross‐resistance among pest populations different fields. Study on the mechanism related genes will help resistance management field control. In this study, pesticide‐resistance Spodoptera frugiperda (FAW) was studied with 3 locations South China. Field FAW were highly resistant to insecticides, chlorpyrifos (organophosphate) deltamethrin (pyrethroid), had higher levels cytochrome P450 activity than a non‐resistant laboratory strain. Inhibition by piperonyl butoxide significantly increased sensitivity chlorpyrifos, chlorantraniliprole (amide), type insecticide, suggesting that detoxification is critical factor for insecticide populations. Transcriptomic analysis indicated 18 upregulated collected regions 2 consecutive years, CYP321A8 , most one. Knockdown messenger RNA interference resulted an tested insecticides FAW. Enzyme molecular docking analyses enzyme able metabolize interact 8 other types confirming key gene wide range substrates across be used as biomarker target

Language: Английский

Citations

4
Transboundary migration of Loxostege sticticalis (Lepidoptera: Crambidae) among China, Russia and Mongolia DOI

Shao‐zhe Huang,

Lei Zhang, Dianjie Xie

et al.

Pest Management Science, Journal Year: 2024, Volume and Issue: 80(9), P. 4650 - 4664

Published: May 22, 2024

Abstract BACKGROUND The beet webworm, Loxostege sticticalis , a worldwide pest of many crops, performs seasonal migration, causing periodic outbreaks in Asia, Europe and North America. Although long‐distance migration is well documented China, patterns transboundary among Russia Mongolia are largely unknown. We performed phase analysis L. three countries based on 30 years historical population data, analyzed the wind systems during over boundary regions, traced migratory routes case study 2008 by trajectory simulation. RESULTS Highly synchronized outbreak were observed between China Mongolia, eastern Siberia, western Siberia from 1978 to 2008, indicating possible these regions. Winds at 300–600 m altitude, where adult usually occurs, also showed high probability northwestern winds Haila'er (China), Chita (Russia) Choybalsan (Mongolia), favoring successful areas northern northeastern China. Back further that first‐generation adults caused severe second‐generation larvae originated regions China–Russia China–Mongolia. CONCLUSION Our findings demonstrated source was closely related via windborne migration. This information will help guide international monitoring management strategies against this notorious pest. © 2024 Society Chemical Industry.

Language: Английский

Citations

4
Population genomics of migratory and resident Spodoptera frugiperda reveals key genes and loci driving migration traits DOI Open Access
Zhongxiang Sun, Pengfei Fu,

Yaping Chen

et al.

Pest Management Science, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

The fall armyworm (Spodoptera frugiperda, FAW) is one of the most devastating invasive pests in world, owing to its extraordinary migration performance. Research has clarified migratory pathways and external environmental factors affecting FAW migration. However, internal genes loci regulating or reside remain largely unknown. In this study, we used a tethered flight mill system distinguish resident individuals, which exhibit significant differences flight-related traits such as distance, duration, maximum speed. Selective sweep analysis 51 resequencing (23 28 individuals) identified 652 candidate genes, genome-wide association (GWAS) 79 functional annotated associated with trait, distance. These were mainly concentrated amino acid metabolism, signal transduction, adaptation. neuroendocrine convertase 2 gene was crossed between two analyses, 65 selective mutation intron region. Casein kinase I, reported circadian rhythm by phosphorylating period, simultaneously involved several enriched signaling pathways, had 11 regulatory may affect expression target regulate behavior FAW. Key determine other pathways. findings provide new perspective for elucidating driving mechanism insects, possibility developing eco-friendly control strategies pests. © 2025 Society Chemical Industry.

Language: Английский

Citations

0
Fall armyworm outbreak in mainland Southeast Asia: Spatial mapping and impact on regional maize production DOI Creative Commons

Eiichi Kusano,

Nipon Poapongsakorn,

Urairat Jantarasiri

et al.

CABI Agriculture and Bioscience, Journal Year: 2025, Volume and Issue: unknown

Published: May 9, 2025

Language: Английский

Citations

0
Europe Under Siege? Predicting Fall Armyworm (Spodoptera frugiperda) Invasion Risk Based on Climatic Niche Shift and Species Distribution Models DOI Creative Commons
Martina Kadoić Balaško, Filip Varga, Martina Temunović

et al.

Diversity and Distributions, Journal Year: 2025, Volume and Issue: 31(5)

Published: May 1, 2025

ABSTRACT Aim Invasive species pose a major threat to biodiversity and ecosystem functioning. Understanding how invasive change their niche during invasion is fundamental for predicting potential risk in novel areas environments. We here study the fall armyworm, FAW ( Spodoptera frugiperda ), one of world's most devastating pests due its severe impact on cereal crops, posing serious agriculture. first investigated climatic changes tested conservatism between native ranges. then modelled distribution assess global scale, focusing Europe agricultural areas. Location Global, with focus Europe. Methods analysed overlap dynamics quantify To predict climatically suitable invasion, we used models (SDMs) calibrated native, (both invasive) occurrence datasets. Results Our results did not support observed shift expansion range towards warmer drier The highest suitability was identified parts Africa, India, China, Australia large southwestern, central southeastern Main Conclusions Given strong migratory capacity, likely further expand establish itself southern Europe, seasonal migrations more temperate regions driven by increased temperatures associated ongoing climate change. confirms that poses significant European agriculture, highlighting urgent need coordinated monitoring efforts implementation adaptive management strategies, including sustainable ones, protect systems worldwide.

Language: Английский

Citations

0
Migration Monitoring and Route Analysis of the Oriental Armyworm Mythimna separata (Walker) in Northeast China DOI Creative Commons

Xinzhu Cang,

Shengyuan Zhao, Xue Yang

et al.

Agronomy, Journal Year: 2023, Volume and Issue: 13(1), P. 172 - 172

Published: Jan. 5, 2023

The oriental armyworm Mythimna separata (Walker) is a worldwide migratory pest that threatens food security in China. Previous studies have clarified the general migration regularity of M. East Asia, but knowledge routes over northeast China, especially autumn as well impact by climate change recent years, still limited. From 2017 to 2020, we monitored China searchlight traps and simulated moth trajectories HYSPLIT model. moths had three main periods there were obvious seasonal differences at different latitudes. spring summer migrants (late May early-mid June late July early August) came from southern Shandong Province migrated north via Hebei/Shandong-Liaoning-Jilin-Heilongjiang. Moreover, more than half trapped insects August mid-late September provinces where sites are located, southward Heilongjiang-Jilin-Liaoning. These results route their relationship with insect source thereby providing theoretical basis for regional monitoring, warning, management pest.

Language: Английский

Citations

8
Use of food attractants to monitor and forecast Spodoptera frugiperda (J. E. Smith) seasonal abundance in southern China DOI

Wei He,

Liying Wang,

Chunyang Lv

et al.

Journal of Pest Science, Journal Year: 2023, Volume and Issue: 96(4), P. 1509 - 1521

Published: Feb. 23, 2023

Language: Английский

Citations

8