Lepidoptera captured on the East China Sea in 2005 and predicted migration sources

Kawazu, Kei; Adati, Tarô; Tonogouchi, Hisako; Yase, Junya

doi:10.1111/j.1479-8298.2008.00282.x

Cited by 12 publications

(5 citation statements)

References 12 publications

(31 reference statements)

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“…The rice leaffolder, Cnaphalocrocis medinalis Guenée (Lepidoptera: Pyralidae), is a serious migratory insect pest causing significant damage to rice crops in many Asian countries (Kawazu et al , ). To control this pest species, application of synthetic insecticides have been used frequently for decades.…”

Section: Introductionmentioning

confidence: 99%

Transcriptome sequencing reveals abundant olfactory genes in the antennae of the rice leaffolder, Cnaphalocrocis medinalis (Lepidoptera: Pyralidae)

Liu

Wang

Zhang

et al. 2017

Entomological Science

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The rice leaffolder, Cnaphalocrocis medinalis Guenée, is an important lepidopteran pest of rice in Asia. Insect olfactory proteins, including olfactory receptors (ORs), ionotropic receptors (IRs), odorant‐binding proteins (OBPs), chemosensory proteins (CSPs) and sensory neuron membrane proteins (SNMPs), are responsible for perception of sex pheromones and host plant volatiles, and thus regulate insect behavior. In the present study, transcriptome sequencing was conducted for C. medinalis antennae to identify genes involved in olfaction. A total of 45800 unigenes were assembled from the transcriptome dataset. Of these, 19696 (43.0%) unigenes were annotated by searching against the NCBI non‐redundant database. Functional classification of these unigenes were also conducted by using the Gene Ontology (GO) and Cluster of Orthologous Groups (COG) databases. We identified 90 putative olfactory genes (including 37 novel ones): 46 ORs, 15 IRs, 12 OBPs, 15 CSPs and two SNMPs. BLASTX best hit results indicated that these genes were most identical to their respective orthologs from other lepidopteran insects. Quantitative reverse transcription‐PCR (qRT‐PCR) assays were performed to investigate the expression profiles of newly identified OR genes. All of the OR genes were antennae‐specific or antennae‐enriched. Of these, CmedOR28 and CmedOR31 were mainly expressed in male antennae, while CmedOR27 and CmedOR32 were enriched in female antennae. Our results establish a solid foundation for future functional studies of these genes.

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Section: Introductionmentioning

confidence: 99%

Transcriptome sequencing reveals abundant olfactory genes in the antennae of the rice leaffolder, Cnaphalocrocis medinalis (Lepidoptera: Pyralidae)

Liu

Wang

Zhang

et al. 2017

Entomological Science

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“…In the present study, we used the Oriental armyworm ( Mythimna separata Walker) as the host species. Mythimna separata naturally feeds on grasses but is also a destructive pest on corn and rice crops, particularly in Asia (Kawazu et al , 2008) and is considered one of the most important hosts of these three endoparasitoids.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic competition among solitary and gregarious endoparasitoid wasps and the phenomenon of ‘resource sharing’

Magdaraog

Harvey

Tanaka

et al. 2012

Ecological Entomology

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1. Intrinsic competition was compared in three species of braconid wasps, the solitary Meteorus pulchricornis Wesmael, and the gregarious Cotesia kariyai (Watanabe) and Cotesia ruficrus Haliday in caterpillars of their common host, the armyworm Mythimna separata Walker. Competition was determined in pairwise contests consisting of simultaneous and subsequent parasitisms at various time intervals between the first and second attacks (<1, 24, 48, 72, and 96 h).2. The experiment revealed that the solitary M. pulchricornis parasitoid was generally superior over the other two gregarious Cotesia species, although, in some cases C. kariyai out-competed M. pulchricornis when ovipositing first. In contrast, irrespective of the time interval between parasitism and multiparasitism, C. ruficrus always lost in competition with M. pulchricornis.3. Remarkably, both C. kariyai and C. ruficrus occasionally emerged from the same multiparasitised caterpillar when the time interval between the first and second attacks was small. However, cumulative brood sizes of both species were generally less than when C. kariyai and C. ruficrus developed alone, suggesting that some competition did occur between these two species.4. Inter-specific 'resource sharing' amongst parasitoid larvae has rarely been described in the literature. In the present study, the conditions in which 'resource sharing' in parasitoids can evolve are discussed. Further, we describe differing host usage strategies in parasitoids and how these can affect the outcome of aggressive larval competition.

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“…High temperatures are known to enhance the growth of CCW, and rainfall decreases the larval density because young larvae are vulnerable to water. Common cutworm cannot overwinter in Japan, and Kawazu et al (2008) predicted that CCW migrated to Japan from Fujian and Guangdong provinces in China and from Taiwan. Migration times and numbers of CCW differ from year to year because of yearly differences in wind direction and strength.…”

Section: Discussionmentioning

confidence: 99%

“…In Kyushu, Japan, CCW have been observed in almost all soybean fields. The adult moths arrive from areas outside Japan (Kawazu et al, 2008) and oviposit on leaves of soybean and other hosts; indeed, CCW has been reported to feed on the leaves of more than 120 plant species (Venette et al, 2003). The hatched larvae feed on the leaves day and night until pupation.…”

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confidence: 99%

Field Assessment of Resistance QTL to Common Cutworm in Soybean

et al. 2015

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The common cutworm (CCW; Spodoptera litura Fabricius) is a herbivorous insect pest of soybean [Glycine max (L.) Merr.] in Asia and Oceania. Previous genetic analyses revealed that the CCW‐resistant soybean cultivar Himeshirazu possessed resistance alleles of two quantitative trait loci, CCW‐1 and CCW‐2, for antibiosis and qRslx1 for antixenosis, although CCW‐1 and qRslx1 are likely to be the same locus. Here we assessed the effects of these resistance loci under field conditions using three near‐isogenic lines (NILs) with different combinations of resistant alleles. Larval densities were evaluated in the three NILs and parental cultivars. The NIL with CCW‐1 (qRslx1) had lower larval densities than the susceptible recurrent parent Fukuyutaka on almost all investigation dates, and significant differences were detected multiple times. Conversely, the NIL with CCW‐2 showed no significant differences in larval densities compared with Fukuyutaka. To our knowledge, this is the first report to indicate that CCW‐1 (qRslx1) is effective for CCW resistance under field conditions. Notably, Himeshirazu represented more distinct resistance compared with the three NILs, indicating Himeshirazu may possess resistance gene(s) other than CCW‐1 (qRslx1) and CCW‐2.

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Lepidoptera captured on the East China Sea in 2005 and predicted migration sources

Cited by 12 publications

References 12 publications

Transcriptome sequencing reveals abundant olfactory genes in the antennae of the rice leaffolder, Cnaphalocrocis medinalis (Lepidoptera: Pyralidae)

Transcriptome sequencing reveals abundant olfactory genes in the antennae of the rice leaffolder, Cnaphalocrocis medinalis (Lepidoptera: Pyralidae)

Intrinsic competition among solitary and gregarious endoparasitoid wasps and the phenomenon of ‘resource sharing’

Field Assessment of Resistance QTL to Common Cutworm in Soybean

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