DETERMINING THE WING‐MORPH OF ADULT <i>NILAPARVATA LUGENS</i> AND <i>SOGATELLA FURCIFERA</i> FROM MORPHOMETRIC MEASUREMENTS ON THE FIFTH‐INSTAR NYMPHS

Cook, A. G.; Perfect, Timothy J.

doi:10.1111/j.1570-7458.1982.tb03128.x

Cited by 9 publications

(8 citation statements)

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“…3 could be related to the spread or duration of the initial immigration into the crop. Perfect & Cook (1982) and Jeffrey (1982) reported significantly higher records of flight activity by N.lugem at full moon than during other phases of the lunar cycle from analysis of light trap and suction trap data. The fact that no differences were found in either the proportion or number of macropterous insects developing in relation to lunar phase suggests that this is primarily a behavioural response with insects showing either increased flightwillingness at full moon or simply larger num-18 bers taking off because of the extended period when light conditions are favourable.…”

Section: Discussionmentioning

confidence: 99%

“…To determine the changes in wingmorph distribution occurring within one population it is therefore necessary to examine the fifth-instar nymphs. where presumptive wingmorph can be determined by measurement of wing-pad length (Cook & Perfect, 1982). This paper summarizes data on wing dimorphism in N.lugens and S. furcifera collected during the course of studies on the ecology and migration of planthoppers associated with rice undertaken in Laguna Province, Philippines, from 1980 to 1983.…”

Section: Introductionmentioning

confidence: 99%

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Seasonal abundance of macropterous Nilaparvata lugens and Sogatella furcifera based on presumptive macroptery in fifth‐instar nymphs

Cook¹,

Perfect²

1985

Ecological Entomology

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Abstract. 1. The seasonal changes in abundance of macropterous N. lugens (Stal) and S. furcifera (Horvath) (Homoptera: Delphacidae) are described based on observed numbers of adults and presumptive macroptery in fifth‐instar nymphs occurring in rice crops in the Philippines. 2. Percentage presumptive macroptery in fifth‐instar nymphs was correlated with nymphal density over the range of 0–20 nymphs per hill for females of both species and 5–20 nymphs per hill for male N. lugens. 3. Lunar phase had no effect on wingmorph expression in either species. 4. Comparison of the percentage macroptery in fifth‐instar nymphs with subsequent percentage macroptery in N. lugens adults for one season showed net emigration occurred from 60 DAT (days after transplanting) to harvest except for a period of net immigration lasting 7–10 days at approximately 95 DAT for both sexes.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seasonal abundance of macropterous Nilaparvata lugens and Sogatella furcifera based on presumptive macroptery in fifth‐instar nymphs

Cook¹,

Perfect²

1985

Ecological Entomology

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“…Juvenile hormone also plays an important role in wing morph determination in the brown plant hopper Nilaparvata lugens (Iwanaga & Tojo 1986). In this plant hopper, differences in wing pad length are observed during the last two nymphal instars (Cook & Perfect 1982;Yamada 1990). The underlying mechanism explaining the differentiation of wing morphs is unknown for L. migratoria.…”

Section: Fore Femurmentioning

confidence: 99%

Wing dimorphism in the migratory locust,Locusta migratoria: differentiation of wing morph and phase polyphenism

Nishide

Tanaka

2013

Entomological Science

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A short‐winged morph was recently discovered in the migratory locust, Locusta migratoria. It is different from the normal, long‐winged morph not only in forewing length but also in hind femur length, displaying a dimorphism. To understand the significance of this dimorphism, other morphological characters were compared between the two morphs, and the time of differentiation of wing‐pad length was investigated. Wing weights were heavier in the long‐winged morph than in the short‐winged morph. This result showed that the short‐winged morph is not formed by a failure of wing expansion. No obvious morph‐specific differences were observed in wing venation, but wing allometry studies indicated that the distal areas of the fore‐ and hindwings were disproportionally reduced in the short‐winged morph compared to the long‐winged morph. The morphological differentiation of the wing pad between the two morphs was observed at the penultimate nymphal stage. The flight muscle was well developed in the two morphs, and no sign of flight muscle histolysis was detected in either morph after adult emergence. An analysis of adult body dimensions suggested that the density‐dependent phase shifts known for the long‐winged morph of this locust were also exhibited by the short‐winged morph, demonstrating that these shifts are not specific to the migratory long‐winged morph.

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“…Therefore, accurately understanding the wing morph dynamics of white-backed planthopper is beneficial to predict the quantity changes of white-backed planthopper in time and avoid the outbreak of pests. Cook and Perfect (1982) have demonstrated stable relations between the wing bud length of fifth-instar nymph and wing morph of brown planthopper reared on different rice conditions (Qi et al 1994). Yamada (1990) pointed out that 0.94 mm is the critical value of wing bud length at which fifth-instar nymphs of brown planthopper developed into long-winged female adults.…”

Section: Discussionmentioning

confidence: 99%

“…White-backed planthopper wing bud length is in relation to adult wing length (Cook and Perfect 1982, Yamada 1990, Qi et al 1994), for example, the fifth-instar nymph with wing bud longer than 1.10 mm emerged as long-winged adult, with wing bud shorter than 0.95 mm emerge as short-winged adult (Qi et al 1994), but little is known about the development and differentiation of wing buds at the molecular level. In this study, we performed de novo transcriptome sequencing on long-winged and short-winged female fifth-instar nymphs of white-backed planthopper by Illumina HiSeq high-throughput sequencing technology.…”

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confidence: 99%

De Novo Assembly and Analysis of the White-Backed Planthopper (Sogatella furcifera) Transcriptome

Liang

Zhang

Jia

et al. 2018

Journal of Insect Science

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The white-backed planthopper Sogatella furcifera (Horváth) has become an important pest on rice in China and Southeast Asian countries. White-backed planthopper wing bud length is in relation to adult wing length, but little is known about the development and differentiation of wing buds at the molecular level. Using Illumina HiSeq high-throughput sequencing technology, we sequenced four cDNA libraries, two biological replicates of long-winged female fifth-instar nymphs (LW), and two of short-winged nymphs (SW). In total, 62,154 unigenes with an average length of 984 bp and N50 length of 1,878 bp were obtained by de novo transcriptome assembly. A total of 18,416 open reading frames (ORFs) were predicted based on the unigenes. Ninety-three percentage of these ORFs could be annotated by searching for homology in six protein databases. A total of 184 differentially expressed genes (DEGs) with 129 upregulated and 55 downregulated were found in SW compared to LW. Gene Ontology and euKaryotic Orthologous Group classification provided comprehensive information about the function of each gene. Kyoto Encyclopedia of Genes and Genomes enrichment analysis revealed five enriched pathways including three metabolic pathways. In addition, we found that some DEGs were relevant to muscle movement and cuticle and likely involved in development and differentiation of wing buds. This study provided transcriptome resource of female fifth-instar nymphs of white-backed planthopper including long-winged and short-winged nymphs, and different molecular features between them lay the foundation for adult wing morph prediction, promoting further studies on planthopper population management.

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DETERMINING THE WING‐MORPH OF ADULT NILAPARVATA LUGENS AND SOGATELLA FURCIFERA FROM MORPHOMETRIC MEASUREMENTS ON THE FIFTH‐INSTAR NYMPHS

Cited by 9 publications

References 6 publications

Seasonal abundance of macropterous Nilaparvata lugens and Sogatella furcifera based on presumptive macroptery in fifth‐instar nymphs

Seasonal abundance of macropterous Nilaparvata lugens and Sogatella furcifera based on presumptive macroptery in fifth‐instar nymphs

Wing dimorphism in the migratory locust,Locusta migratoria: differentiation of wing morph and phase polyphenism

De Novo Assembly and Analysis of the White-Backed Planthopper (Sogatella furcifera) Transcriptome

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