scholarly journals Early Summer Outbreaks of the Oriental Armyworm, Mythimna separata WALKER, in the Tohoku District and Possible Causative Factors(Lepidoptera : Noctuidae)

1974 ◽  
Vol 9 (4) ◽  
pp. 238-246 ◽  
Author(s):  
Toshio OKU ◽  
Takashi KOBAYASHI
Keyword(s):  
Early Summer ◽  
Mythimna Separata ◽  
Causative Factors ◽  
Oriental Armyworm ◽  
Lepidoptera Noctuidae

Transcriptional identification of differentially expressed genes during the prepupal–pupal transition in the oriental armyworm, Mythimna separata (Walker) (Lepidoptera: Noctuidae)

2021 ◽  
pp. 1-14
Author(s):  
Peirong Li ◽  
Xinru Li ◽  
Wei Wang ◽  
Xiaoling Tan ◽  
Xiaoqi Wang ◽  
...  
Keyword(s):  
Differentially Expressed Genes ◽  
Metabolic Pathways ◽  
Developmental Stages ◽  
Kegg Pathway ◽  
Enrichment Analysis ◽  
Differentially Expressed ◽  
Mythimna Separata ◽  
Kegg Pathway Analysis ◽  
Oriental Armyworm ◽  
Lepidoptera Noctuidae

Abstract The oriental armyworm, Mythimna separata (Walker) is a serious pest of agriculture that does particular damage to Gramineae crops in Asia, Europe, and Oceania. Metamorphosis is a key developmental stage in insects, although the genes underlying the metamorphic transition in M. separata remain largely unknown. Here, we sequenced the transcriptomes of five stages; mature larvae (ML), wandering (W), and pupation (1, 5, and 10 days after pupation, designated P1, P5, and P10) to identify transition-associated genes. Four libraries were generated, with 22,884, 23,534, 26,643, and 33,238 differentially expressed genes (DEGs) for the ML-vs-W, W-vs-P1, P1-vs-P5, and P5-vs-P10, respectively. Gene ontology enrichment analysis of DEGs showed that genes regulating the biosynthesis of the membrane and integral components of the membrane, which includes the cuticular protein (CP), 20-hydroxyecdysone (20E), and juvenile hormone (JH) biosynthesis, were enriched. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis indicated that DEGs were enriched in the metabolic pathways. Of these DEGs, thirty CP, seventeen 20E, and seven JH genes were differentially expressed across the developmental stages. For transcriptome validation, ten CP, 20E, and JH-related genes were selected and verified by real-time PCR quantitative. Collectively, our results provided a basis for further studies of the molecular mechanism of metamorphosis in M. separata.

scholarly journals Characterization of the complete mitochondrial genome of the Oriental armyworm, Mythimna separata (Lepidoptera: Noctuidae)

2015 ◽  
Vol 112 (3) ◽  
pp. 399-408 ◽  
Author(s):  
Qiu-Ning LIU ◽  
Dan-Dan Bian ◽  
Sen-Hao JIANG ◽  
Bao-Ming GE ◽  
Chun-Lin ZHOU ◽  
...  
Keyword(s):  
Mitochondrial Genome ◽  
Complete Mitochondrial Genome ◽  
Mythimna Separata ◽  
Oriental Armyworm ◽  
Lepidoptera Noctuidae

Demography of Mythimna separata (Lepidoptera: Noctuidae) at outdoor fluctuating temperatures

2021 ◽  
pp. 1-9
Author(s):  
Bo-Liao Li ◽  
Mei-Mei Li ◽  
Tian-Tian Li ◽  
Jun-Xiang Wu ◽  
Xiang-Li Xu
Keyword(s):  
Larval Instar ◽  
Intrinsic Rate ◽  
Immature Stage ◽  
Early Summer ◽  
Intrinsic Rate Of Increase ◽  
Mythimna Separata ◽  
Rate Of Increase ◽  
Table Data ◽  
Lepidoptera Noctuidae ◽  
Fluctuating Temperatures

Abstract The oriental armyworm Mythimna separata (Walker) (Lepidoptera: Noctuidae) is a major migratory pest of cereal crops in East Asia, South Asia and Australia. To comprehensively understand the ecological tolerance of M. separata, we collected life table data of individuals from four consecutive generations reared under outdoor natural fluctuating temperatures from 15 April to 17 October 2018 in Yangling, Shaanxi, China. The results showed that the immature stage in early summer and summer were shorter than in spring and autumn. High mortality in late larval instar and pupal stages was observed in the summer generation. The adult pre-oviposition period in autumn was longer than the other seasons. The population in the earlier two seasons had heavier pupae and higher fecundity than the population in the latter two seasons. The intrinsic rate of increase and the finite rate of increase was the highest in early summer (r = 0.1292 day−1, λ = 1.1391 day−1), followed by spring (r = 0.1102 day−1, λ = 1.1165 day−1), and was the lowest in summer (r = 0.0281 day−1, λ = 1.0293 day−1). The results of this study would be useful to predict the population dynamics of M. separata and deepen our standing of the adaptiveness of this migratory pest in natural fluctuating ambient environments.

Effect of several factors on the phototactic response of the oriental armyworm, Mythimna separata (Lepidoptera: Noctuidae)

2018 ◽  
Vol 21 (3) ◽  
pp. 952-957 ◽  
Author(s):  
Kil-Nam Kim ◽  
Hye-Seng Song ◽  
Chung-Seng Li ◽  
Qiu-Ying Huang ◽  
Chao-Liang Lei
Keyword(s):  
Mythimna Separata ◽  
Phototactic Response ◽  
Oriental Armyworm ◽  
Lepidoptera Noctuidae
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