Rice and Weed Hosts of Rice Tungro-Associated Viruses and Leafhopper Vectors

Khan, Md. Akhtaruzzaman; Hibino, Hiroki; Aguiero, V. M.; Daquioag, R. D.; Opina, O. S.

doi:10.1094/pd-75-0926

Cited by 23 publications

(16 citation statements)

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“…Using DAS‐ELISA, mechanical inoculation and IC‐RT‐PCR, we were able to identify six weed species belonging to families Amaranthaceae, Boraginaceae, Chenopodiaceae, Portulacaceae and Solanaceae, which proved to be natural hosts of CGMMV (Table 5). All infected plants were symptomless, as has been previously observed for other viruses (Powell et al., 1984; Khan et al., 1991; Chatzivassiliou et al., 2000) and this is attributed, among others, to natural selection (Duffus, 1971).…”

Section: Discussionsupporting

confidence: 80%

Etiology of Leaf Chlorosis and Deterioration of the Fruit Interior of Watermelon Plants

Boubourakas¹,

Hatziloukas²,

Antignus³

et al. 2004

Journal of Phytopathology

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A severe disease with combined symptomatology affecting only grafted watermelon plants appeared in several regions of northern and central Greece during the summers of 1999 and 2000. Disease symptoms included chlorotic mottling followed by pedicel necrosis at a later more mature fruit stage, and finally decomposition of fruit interior. Electron microscopy, double antibody sandwich enzyme-linked immunosorbent assay tests and reverse transcriptase-polymerase chain reaction assays identified Cucumber green mottle mosaic virus (CGMMV) as the causal agent. Our studies indicated that the CGMMV isolates from watermelon are closely related to the Israeli variant of CGMMV (CGMMV-Is). However, bioassays revealed that the Greek isolates elicit symptoms of higher severity and have a wider host range, compared with other described CGMMV isolates. Nucleotide sequence comparison of the movement protein gene of the Greek isolates showed a 97-99% identity with other CGMMV strains. This paper reports the presence of the virus in arable weeds such as Amaranthus blitoides, Amaranthus retroflexus, Heliotropium europaeum, Portulaca oleracea and Solanum nigrum.U. S.

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Section: Discussionsupporting

confidence: 80%

Etiology of Leaf Chlorosis and Deterioration of the Fruit Interior of Watermelon Plants

Boubourakas¹,

Hatziloukas²,

Antignus³

et al. 2004

Journal of Phytopathology

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“…-,^m ^^^ , > irU-i% n T n n , • ,f , , ... , , * ,--i-i u "^ (Hibino et al, 1979;Hibino, 1983a;Khan et al, 1991). RTBV Agriculture, c/o L.W.…”

Section: Introductionmentioning

confidence: 99%

Population characteristics and tungro transmission by Nephotettix virescens (Hemiptera: Cicadellidae) on selected resistant rice cultivars

Dahal

Hibino

Aguiero

1997

Bull. Entomol. Res.

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Rice green leafhopper Nephotettix virescens (Distant) populations were collected in 1985 from fields planted with a leafhopper resistant rice, Onjza sativa cultivar IR64 in South Cotabato, Philippines. The populations were reared on IR64 for eight generations and tested on six cultivars, including susceptible TNI, moderately resistant IR26 and IR36, and resistant IR54, IR62, and IR64. Leafhoppers excreted larger amounts of basic honeydew, efficiently transmitted two tungro associated viruses, and showed greater population increase and lower nymphal mortality on all cultivars except IR62 than a greenhouse population reared on TNI. Nephotettix virescens were transferred and maintained on TNI, IR26, IR36, IR64, or a mixture of the four cultivars plus IR54 and IR56 in equal proportion. When the TNl-maintained colony was tested at the third generation, its feeding behaviour and tungro transmission rates on test cultivars were similar to those of the original population but amounts of basic honeydew excretion and the transmission rate on the resistant test cultivars were greatly reduced at the seventh or later generations. When the IR26-maintained colony was tested at the sixth, ninth, or 13th generation, it exhibited lower amounts of basic honeydew excretion on the resistant test cultivars but exhibited similar transmission efficiencies on other test cultivars. When the colonies maintained on IR36, IR64, or the cultivar mixture were tested similarly, their population characteristics and virus transmission efficiency were similar to the original population. These results indicate that N. virescens retain their 'virulence' to resistant cultivars when maintained on resistant cultivars, but quickly lose their 'virulence' when maintained on a susceptible cultivar. Colonies continuously reared on IR26, IR36 or IR64 showed 'cross-virulence' to many cultivars possessing a variety of genes for N. virescens resistance but often differed in feeding behaviour, virus transmission efficiency, and nymphal mortality on cultivars with the same genes for leafhopper resistance. Introductioncomposite disease caused by rice tungro bacilliform virus Tungro is the most important virus disease of rice, Oryza ( R T B V ) a n d r i c e t u n S r o spherical virus (RTSV) (Omura et al., sativa, in south and southeast Asia (Ling, 1972). It is a 1 9 8 3 )-R T B V a n d R T S V a r e transmitted in a semi-persistent manner by the leafhopper Nephotettix virescens (Distant)

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“…Gulma-gulma utama yang menjadi inang virus tungro harus dipantau keberadaannya sejak awal pengolahan baik di lahan maupun di sekitar areal pertanaman. Empat spesies gulma, yaitu C. rotundus, C. iria, F. miliaceae, dan E. colonum merupakan spesies gulma yang paling berpotensi menjadi sumber inokulum virus tungro (Khan et al 1991).…”

Section: Pendahuluanunclassified

“…Pemantauan ratun dan gulma utama inang virus tungro perlu disinkronkan dengan pemantauan keberadaan dan dominasi populasi wereng hijau. Keberadaan populasi N. nigropictus di lapangan dapat menularkan virus tungro dari gulma ke tanaman padi (Khan et al 1991), sehingga dengan eradikasi gulma potensial sebelum penyemaian dan setelah tanam menjadi tindakan yang komplementer dengan pengendalian penyakit tungro (Ladja et al 2016) Daerah dengan pola tanam sama rata, waktu semai yang tepat merupakan strategi awal untuk menghindari infeksi virus tungro di persemaian. Persemaian sebelum terjadi peningkatan populasi wereng hijau dapat mengurangi terjadinya infeksi awal virus tungro di persemaian (Praptana & Yasin 2008).…”

Section: Pengaruh Eradikasi Gulma Terhadap Kejadian Serangan Tungrounclassified

Effect of Eradication of Weeds to the Development of Green Leafhopper Population and Tungro Disease Incidence on Rice

Praptana¹,

Senoaji²

2017

JIPI

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Rice and Weed Hosts of Rice Tungro-Associated Viruses and Leafhopper Vectors

Cited by 23 publications

References 0 publications

Etiology of Leaf Chlorosis and Deterioration of the Fruit Interior of Watermelon Plants

Etiology of Leaf Chlorosis and Deterioration of the Fruit Interior of Watermelon Plants

Population characteristics and tungro transmission by Nephotettix virescens (Hemiptera: Cicadellidae) on selected resistant rice cultivars

Effect of Eradication of Weeds to the Development of Green Leafhopper Population and Tungro Disease Incidence on Rice

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