The level of resistance of rice varieties ir5 to ir46 to the green leafhopper, nephotettix virescens distant homoptera. Nephotettix virescens nephimoverview eppo global database. Nephotettix virescens, tungro virus vector, rapdpcr. The population dynamics ofnephotettix virescens, a vector of rice tungro virus disease was investigated in a synchronized transplanting area at jatisari 19841986, west java and in a staggered transplanting area at sidan 19861988, bali, indonesia. This study examines aspects of virulence to resistant rice varieties among planthoppers and leafhoppers. Varian efikasi penularan tungro oleh kolonikoloni wereng. Other readers will always be interested in your opinion of the books youve read. Inoue 1986 tested nymphal survival on 15 grass species genera and no adults emerged except from those nymphs reared on rice.
Journal common insect pests of rice and their natural. Rtd is caused by rice tungro bacilliform virus rtbv and rice tungro spherical virus rtsv. The total protein band profile of the green leafhoppers. Karakterisasi individu wereng hijau nephotettix virescens. Quantitative ecology transmission of insectvectored. Population dynamics of the green leafhopper, nephotettix. Resistance to green leafhopper nephotettix virescens and brown planthopper nilaparvata lugens in transgenic rice expressing snowdrop lectin galanthus nivalis agglutinin. Insect feeding on diseased plants was disrupted and the quantity of. Cicadellidae on rice varieties with different levels of resistance article pdf available in environmental entomology 193. They are active during day and night and walk sidewise. Green leafhopperresistant variety is one of rice tungro virus disease control measure. These pages form part of a scientific key which will assist a trained entomologist to identify the species accurately. One of the major threats in rice agriculture is the tungro virus, which is transmitted semipersistently to rice plants via green rice leafhoppers called nephotettix virescens.
The total protein band pattern of the green leafhoppers nephotettix virescens and the leaves of rice oryza sativa infected by tungro virus. Effect of meteorological factors on symptomatology and acquisition of rice tungro virus by nephotettix virescens. Among 7 sources of resistant gene to glh 4 genes have been employed to breed. The pdf file you selected should load here if your web browser has a pdf reader plugin installed for example, a recent version of adobe acrobat reader if you would like more information about how to print, save, and work with pdfs, highwire press provides a helpful frequently asked questions about pdfs alternatively, you can download the pdf file directly to your computer, from where it. Host specificity of rice green leafhoppers, nephotettix virescens. The mode of inheritance of resistance to green leafhopper in 12 cultivars of riceoryza saliva l. A test plants covered with 1 mm pores net, b green leaf hopper associated with rice plant after. Population dynamics of the green leafhopper, nephotettix virescens distant hemiptera.
Read this article to know about spotted jassid nephotettix virescens and life history, nature and distribution. Nephotettix virescens is an important pest in south east asia largely because it is a vector of tungro virus 7,45. Agronomy free fulltext geographic and research center. Pdf the feeding behavior of nephotettix virescens distant on rice varieties with different levels of resistance was.
Species are mostly found in asia, although two are from africa. Dinamika populasi nephotettix virescens pada dua pola. Varian efikasi penularan tungro oleh kolonikoloni wereng hijau nephotettix virescens distant. Gatehouse ja 2000 resistance to green leafhopper nephotettix virescens and brown planthopper nilaparvata lugens in transgenic rice expressing snowdrop lectin. Bulletin of kyushu agricultural experimental station, 16. Cicadellidae berkaitan dengan saat padi keluar malai effects of early and latematuring varieties of rice on the population growth of n. Leafhopper, nephotettix virescens distant hemiptera. The transmission of insectvectored pathogens is dependent on the population dynamics of the vector. The adult have two black spots at the centre of the fore wings.
The genetics of resistance to green leafhopper, nephotettix virescens distant, in rice varieties ir36 and maddai karuppan and breeding line ir20965. Resistance to green leafhopper nephotettix virescens and brown planthopper nilaparvata lugens in transgenic rice expressing. Known as green leafhoppers of paddyrice, nephotettix cincticeps and n. Crop protection one liner for competitive exam agri learner. A new gene for resistance to green leafhopper nephotettix. Nephotettix is a genus of planthoppers in the subfamily deltocephalinae and tribe chiasmini. Pertumbuhan populasi dan oviposisi wereng hijau, nephotettix virescens distant hemiptera. The results revealed that single dominant genes confer. Russula virescens is a basidiomycete mushroom of the genus russula, and is commonly known as the greencracking russula, the quilted green russula, or the green brittlegill. Whether youve loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. The seven previously known species and one subspecies of nephotettix are redefined, namely, n. Nephotettix virescens distant umumnya tidak langsung merusak tanaman padi, tetapi bertindak sebagai penular atau vektor. Virulence of the whitebacked planthopper, sogatella furcifera, in taiwan and the philippines was. Species account nephotettix virescens distant 1908g.
Resistance to green leafhopper nephotettix virescens and brown. Feeding behavior of nephotettix virescens homoptera. Effects of tungro virusinfected rice plants on the behavior and biology of the vector nephotettix virescens distant were investigated. Seedlings of parent and hybrid populations were artificially infested with second and thirdinstar virusfree green leafhopper nymphs. Both species selected the host plants by gustation rather than by vision or olfaction.
Download pdf 845k download meta ris compatible with endnote, reference manager, procite, refworks. Transmission of rice tungro bacilliform virus rtbv and rice tungro spherical virus rtsv to rice and weeds by nephotettix virescens, n. Nephotettix virescens an overview sciencedirect topics. Mixtures of seed oils of custardapple, annona squamosa l. Management of the rice tungro virus vector nephotettix virescens homoptera.
Agriculture mcq with explanation pdf part25 download. Green leafhopper glh, nephotettix virescens is the most efficient vector of tungro. A mathematical model of transmission of rice tungro. Here, we analyzed multiple genetic resistance to bph and the green rice leafhopper grh. Nephotettix virescens the adults are pale green with black markings on the head and wings. Tungroinfected plants had a significantly higher free sugar content but soluble protein was significantly lower than in healthy plants. It has crowded white gills, and a firm, white stipe. Systematic position phylum arthropoda advertisements.
Efek negatif tersebut berupa timbulnya hama dan patogen yang tahan. Unlimited viewing of the articlechapter pdf and any associated supplements and figures. Resistance to green leafhopper nephotettix virescens and brown planthopper nilaparvata lugens in transgenic rice expressing snowdrop lectin galanthus nivalis. Irris breeding program has traditionally included routine screening of all materials for resistance to n. Population dynamics, forecasting and control of the green rice leafhopper, nephotettix cincticeps uhler. Pada musim hujan, hama dan penyakit yang biasa merusak tanaman padi adalah. Major pests of rice and their management agriedu4u. The reactions of f1 hybrids, f2 populations and f3 lines from the crosses of test varieties with the susceptible variety tn1 revealed that resistance in ir36 and maddai karuppan, is. Using two independent f 2 populations derived from a cross between asd7 and taichung 65 oryza. Influence of graded levels of fertilizers against brown planthoppers bph, nilaparvata lugens stal and green leaf hopper nephotettix virescens distant in paddy.
Screening of hybrid and inbreed rice varieties against. The farmcop suction sampler was employed for population censuses ofn. Resistance to green leafhopper nephotettix virescens and. Nephotettix virescens distant is the most efficient vector of tungro virus with transmission ability of 80% approximately17. A comparative study of the different bionomic and demographic parameters of four green leafhoppers, nephotettix spp. The objective of this research was to identify the characteristics of nephotettix virescens as the active transmitter of the rice tungro virus. It has been estimated that in five states in southern india between 17 and 23 kgha of grain yield was lost to n. Plant age and levels of resistance to green leafhopper, nephotettix. Karakter populasi wereng hijau, nephotettix virescens. Cicadellidae with controlledrelease formulations of. Biotechnological prospects for engineering insectresistant plants.
Family cicadellidae genus nephotettix species virescens distribution. Files are available under licenses specified on their description page. Interaction of the two viruses results in the degeneration. Cicadellidae plays an important role as a vector of. Pdf feeding behavior of nephotettix virescens homoptera. In a choice test, tungroinfected plants attracted significantly more n.
Many of the insects depicted on these pages are outwardly similar and you should not use photographs as the sole means of identification. All structured data from the file and property namespaces is available under the creative commons cc0 license. Seedling reaction was scored when tni, the susceptible check, was completely killed. It can be recognized by its distinctive pale green cap that measures up to 15 cm 6 in in diameter, the surface of which is covered with darker green angular patches. Using a series of resistant varieties, brown planthopper, nilaparvata lugens, virulence was assessed in seedlings and earlytillering plants at seven research centers in south and east asia. Help pages, faqs, uniprotkb manual, documents, news archive and biocuration projects. Longer acquisition times increased the frequency of transmission of both viruses. Scientific name of rice is oryza sativa, it comes under the grass family poaceae. Management of the rice tungro virus vector nephotettix virescens.
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