The Source Areas and Migratory Pathways of the Fall Armyworm Spodoptera frugiperda (Smith) in Sichuan Province, China

Jiang, Chengyao; Zhang, Xueyan; Wu, Jiaqi; Feng, Chuanhong; Ma, Li; Hu, Gao; Li, Qing

doi:10.3390/insects13100935

Cited by 10 publications

(10 citation statements)

References 37 publications

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“…For FAW, wind is an important factor in their migratory activity, as self-powered flight can only support their short-range dispersal. However, we visualized the monthly mean night atmospheric conditions from April to August at 850 hPa height ( Jiang et al., 2022 ) over the study area, and the results showed that the monthly mean wind direction blows from north to south, as shown in Figure 6 . In this study, we simulated more than 680 thousand trajectories and only 4.9% of the trajectories successfully entered the European territory probability density of FAW landing point are shown in Tables S1 , S2 .…”

Section: Discussionmentioning

confidence: 99%

Migration risk of fall armyworm (Spodoptera frugiperda) from North Africa to Southern Europe

Wang

Huang

et al. 2023

Front. Plant Sci.

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With the development of globalization and agriculture trade, as well as its own strong migratory capacity, fall armyworm (FAW) (Spodoptera frugiperda) (J.E. Smith) has invaded more than 70 countries, posing a serious threat to the production of major crops in these areas. FAW has now also been detected in Egypt in North Africa, putting Europe, which is separated from it only by the Mediterranean Sea, at high risk of invasion. Therefore, this study integrated multiple factors of insect source, host plant, and environment to provide a risk analysis of the potential trajectories and time periods of migration of FAW into Europe in 2016~2022. First, the CLIMEX model was used to predict the annual and seasonal suitable distribution of FAW. The HYSPLIT numerical trajectory model was then used to simulate the possibility of the FAW invasion of Europe through wind-driven dispersal. The results showed that the risk of FAW invasion between years was highly consistent (P<0.001). Coastal areas were most suitable for the expansion of the FAW, and Spain and Italy had the highest risk of invasion, with 39.08% and 32.20% of effective landing points respectively. Dynamic migration prediction based on spatio-temporal data can enable early warning of FAW, which is important for joint multinational pest management and crop protection.

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Section: Discussionmentioning

confidence: 99%

Migration risk of fall armyworm (Spodoptera frugiperda) from North Africa to Southern Europe

Wang

Huang

et al. 2023

Front. Plant Sci.

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“…It has been proposed based on the temporal pattern of FAW captures and migration modeling using wind transport systems that annual migrations analogous to that described in North America are occurring in southeastern Asia. Proposed pathways include migration from Myanmar into the Yangtze River Delta, then into Northern China, South Korea, and finally Japan [50][51][52][53]. While the data are suggestive that a northward migration is occurring, the identity of the source populations and the details of the migratory pathways remain speculative.…”

Section: Plos Onementioning

confidence: 99%

Using genetic comparisons of populations from Arizona, Mexico, and Texas to investigate fall armyworm migration in the American southwest

Nagoshi,

Tessnow,

Carrière

et al. 2023

PLoS ONE

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Fall armyworm (FAW) is a global agricultural pest, causing substantial economic losses in corn and many other crops. Complicating efforts to control this pest is its capacity for long distance flights, which has been described in greatest detail for the central and eastern sections of the United States. FAW infestations are also routinely found in agricultural areas in southern Arizona, which lie beyond the western limits of the mapped migratory pathways. Climate suitability analysis found that the affected Arizona locations cannot support permanent FAW populations, indicating that these FAW most likely arise from annual migrations. A better understanding of this migration would provide insights into how large moth populations can move across desert habitats as well as the degree of gene flow occurring between FAW populations across the North American continent. In this study the Arizona populations were genetically characterized and compared to a selection of permanent and migratory FAW from multiple sites in the United States and Mexico. The results are consistent with migratory contributions from permanent populations in the states of Texas (United States) and Sinaloa (Mexico), while also providing evidence of significant barriers to gene flow between populations within Mexico. An unexpected finding was that two genetically distinct FAW subpopulations known as “host strains” have a differential distribution in the southwest that may indicate significant differences in their migration behavior in this region. These findings indicate that the combination of mitochondrial and Z-linked markers have advantages in comparing FAW populations that can complement and extend the findings from other methods.

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“…Meanwhile, being a major migratory pest, the speed at which this pest invades and spreads is concerning. After infesting Myanmar in late 2018, FAW spread to 27 Chinese provinces within a year and became a dominant pest [4,5].…”

Section: Introductionmentioning

confidence: 99%

Gut Microbiota Affects Host Fitness of Fall Armyworm Feeding on Different Food Types

Ma,

Wang,

Ren

et al. 2024

Insects

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The fall armyworm (FAW), Spodoptera frugiperda, seriously threatens food and cash crops. Maize, wheat, and even rice damage by FAWs have been reported in many areas of China. It is urgent to clarify the mechanism which FAWs adapt to different feeding hosts and develop effective control technologies. Two-sex life tables and 16s rDNA sequencing were used to determine the host fitness and gut microbial diversity of FAWs when fed four different food types. Considering the life history parameters, pupa weight, and nutrient utilization indexes, the host fitness of FAWs when fed different food types changed in descending order as follows: artificial diet, maize, wheat, and rice. The gut microbial composition and the diversity of FAWs when fed different food types were significantly different, and those changes were driven by low-abundant bacteria. The gut microbes of FAWs that were fed with maize had the highest diversity. The functions of the gut microbes with significant abundance differences were enriched in nutrient and vitamin metabolism and other pathways that were closely related to host adaptation. Furthermore, we identified five genera (Acinetobacter, Variovorax, Pseudomonas, Bacillus, and Serratia) and one genus (Rahnella) that were positively and negatively correlated with the host fitness, respectively. This study revealed the possible role of gut microbes in the host adaptation of FAWs.

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The Source Areas and Migratory Pathways of the Fall Armyworm Spodoptera frugiperda (Smith) in Sichuan Province, China

Cited by 10 publications

References 37 publications

Migration risk of fall armyworm (Spodoptera frugiperda) from North Africa to Southern Europe

Migration risk of fall armyworm (Spodoptera frugiperda) from North Africa to Southern Europe

Using genetic comparisons of populations from Arizona, Mexico, and Texas to investigate fall armyworm migration in the American southwest

Gut Microbiota Affects Host Fitness of Fall Armyworm Feeding on Different Food Types

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