The Influence of Rearing Temperature and Density of the Development of Two Leucania Species, L. loreyi Dup. and L. separata Walker : Lepidoptera : Noctuidae

Harai, Kazuo

doi:10.1303/aez.10.234

Cited by 12 publications

(17 citation statements)

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“…A study addressing the development of M. loreyi in Japan found that the development of M. loreyi is slowest and the lower threshold temperature is lowest in the larval stage, while the effective accumulated temperature is highest (Hirai 1975). This contrasts with our results where the lowest developmental threshold temperature is in egg stage, with that of the larval stage being lower than in the pupal stage.…”

Section: Discussioncontrasting

confidence: 99%

“…A variety of plants, including rice, wheat, barley, broom corn, maize, and sugarcane, are attacked by M. loreyi, but female moths express a definite oviposition preference for maize in Egypt (El-Sherif 1972). In Japan, M. loreyi has not been reported as a major pest of graminaceous crops, but it frequently occurs with a closely related species, Mythimna separata (Walker), which has profound negative effects on crop production (Hirai 1975). In China, M. loreyi has not been a major crop pest until recently.…”

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“…However, little is known about the ecology and biology of M. loreyi, for which the development of population monitoring strategies and management technologies has been extremely limited. Although the morphological characteristics of the larvae and pupae of these two armyworm species are highly similar, making it difficult to distinguish them in the field, preliminary studies and field observations have indicated that the development rate of M. separata is faster than that of M. loreyi at every stage and at every temperature between 15 and 20 C (Hirai 1975). Therefore, population projections for the two armyworms are expected to differ in the field.…”

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confidence: 99%

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Population Projection and Development of the Mythimna loreyi (Lepidoptera: Noctuidae) as Affected by Temperature: Application of an Age-Stage, Two-Sex Life Table

Qin

Zhang

Liu

et al. 2017

Journal of Economic Entomology

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The Mythimna (=Leucania) loreyi (Duponchel) has recently emerged as a major pest of grain crops in China. Little is known about its basic biology and ecology, making it difficult to predict its population dynamics. An age-stage, two-sex life table was constructed for this insect when reared on maize in the laboratory at five constant temperatures (18, 21, 24, 27, and 30 °C). Both the intrinsic rate of increase (r) and finite rate increase (λ) increased as temperature significantly increased and mean generation time (T) decreased significantly with increasing temperature. The highest values for net reproductive rate (R0) and fecundity were observed at 24 °C. However, M. loreyi was able to develop, survive, and lay eggs at all temperatures tested (18-30 °C). Development rates at different temperatures for the egg, larval, pupal, as well as for a total preoviposition period, fit a linear equation. The lower threshold temperatures of egg, larval, pupal, preoviposition, and total preoviposition period were 8.83, 10.95, 11.67, 9.30, and 9.65 °C, respectively. And their effective accumulated temperatures were 87.64, 298.51, 208.33, 66.47, and 729.93 degree-days, respectively. This study provides insight into the temperature-based phenology and population ecology in M. loreyi. The results will benefit population dynamics monitoring, prediction, and management of this insect pest in the field.

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Section: Discussioncontrasting

confidence: 99%

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confidence: 99%

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Population Projection and Development of the Mythimna loreyi (Lepidoptera: Noctuidae) as Affected by Temperature: Application of an Age-Stage, Two-Sex Life Table

Qin

Zhang

Liu

et al. 2017

Journal of Economic Entomology

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“…A histogram of larval head capsule width failed to identify clear-cut instar groupings. This may be due to M. separata having either 6 or 7 instars (Iwao 1962;Hirai 1975;Burgess 1982). Despite this, peaks in the histogram were used to separate M. separata larvae into 6 size categories.…”

Section: Resultsmentioning

confidence: 99%

Incidence of the armyworm,Mythimna separataWalker (Noctuidae:Lepidoptera), and its introduced parasite,Apanteles ruficrusHalliday (Braconidae:Hymenoptera), in maize

Hill¹,

Atkins²

1983

New Zealand Journal of Agricultural Research

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Sampling of maize fields in SouthAuckland revealed a mean density of 1. heterogeneous between and within fields. This is tentatively attributed to aerial concentration of adult moths resulting from climatic factors, and this is judged to be the most likely mechanism for armyworm outbreaks. Populations were shown to be amenable to accurate estimation with relatively few samples.There was no correlation between M. separata population size and weed cover within sample plots.

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“…The outbreak of this pest and damage on crops has been proliferated particularly in some Asian countries. In Japan, M. loreyi typically occurs together with M. separate (Walker) that has significantly negative affects crop production (Hirai, 1975). Also, M. loreyi has begun to occur and damage host plants together with M. separate (Guo et al,2003).…”

Section: Intoductionmentioning

confidence: 99%

Development of a species diagnostic molecular tool for an invasive pest,Mythimna loreyiusing LAMP

Nam

Kwon

Kim

et al. 2020

Preprint

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The Mythimna loreyi (Duponchel) is one of the well-known a noctuid pest in Africa, Australia, and many Asian countries. This species has recently emerged as an invasive pest of some cereal crops in Korea. However, it is extremely difficult to identify the morphologically similar species, Mythimna separate, which occur at the cornfield in the larvae stage. Therefore, it is hard to accurately investigate invasive pests. In this study, the LAMP assay was developed for rapid, simple, effective species identification. By analyzing the mt genome, the species-specific sequence was found at the coding region of the NADH dehydrogenase subunit 5 gene. Based on this unique sequence, four LAMP primers and two loop primers were designed. The F3 and B3 primers were able to diagnose species-specific in general and multiplex PCR, and specifically reacted within the inner primers in LAMP assay. The optimal incubation condition of the LAMP assay was 61 □ for 60 minutes with four LAMP primers, though additional loop primer, BF and LF, did not significantly shorten the amplification time. The broad range of DNA concentration was workable in LAMP assay, in which the minimum detectable DNA concentration was 100 pg. Here, DNA releasing method was applied which took five minutes of incubation at 95 □ without the DNA extraction process, and only some pieces of tissue from larvae and adult samples were needed. The incidence of invasive pests is gradually diversifying, therefore, this simple and accurate LAMP assay possibly applied in the intensive field monitoring for the invasive pests and integrated management of Mythimna loreyi.

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The Influence of Rearing Temperature and Density of the Development of Two Leucania Species, L. loreyi Dup. and L. separata Walker : Lepidoptera : Noctuidae

Cited by 12 publications

References 0 publications

Population Projection and Development of the Mythimna loreyi (Lepidoptera: Noctuidae) as Affected by Temperature: Application of an Age-Stage, Two-Sex Life Table

Population Projection and Development of the Mythimna loreyi (Lepidoptera: Noctuidae) as Affected by Temperature: Application of an Age-Stage, Two-Sex Life Table

Incidence of the armyworm,Mythimna separataWalker (Noctuidae:Lepidoptera), and its introduced parasite,Apanteles ruficrusHalliday (Braconidae:Hymenoptera), in maize

Development of a species diagnostic molecular tool for an invasive pest,Mythimna loreyiusing LAMP

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