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226 results on '"Reynaud B"'

28. Occurrence of cassava brown streak disease and associated Cassava brown streak virus and Ugandan cassava brown streak virus in the Comoros Islands

Author

Azali, H.A., primary, Maillot, V., additional, Cassam, N., additional, Chesneau, T., additional, Soulezelle, J., additional, Scussel, S., additional, Karime, A.L. Abdoul, additional, Hostachy, B., additional, Reynaud, B., additional, Roux‐Cuvelier, M., additional, Robène, I., additional, and Lett, J.‐M., additional

Published
2017
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30. Long-term viral competition monitoring: a case of epidemiological rescue

Author

Perefarres, F., Thébaud, Gaël, Lefeuvre, P., Hoareau, M., Rimbaud, Loup, Chiroleu, F., Reynaud, B., and Lett, Jean Michel

Subjects
Vegetal Biology, Phytopathology and phytopharmacy, Virologie, Virology, épidémiologie, Phytopathologie et phytopharmacie, pathologie végétale, Biologie végétale
Published
2013

31. Description and phylogenetic placement of Beauveria hoplocheli sp. nov. used in the biological control of the sugarcane white grub, Hoplochelus marginalis, on Reunion Island

Author

Robene-Soustrade, I., primary, Jouen, E., additional, Pastou, D., additional, Payet-Hoarau, M., additional, Goble, T., additional, Linderme, D., additional, Lefeuvre, P., additional, Calmes, C., additional, Reynaud, B., additional, Nibouche, S., additional, and Costet, L., additional

Published
2015
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34. Molecular epidemiology of cassava mosaic disease in Madagascar

Author

Harimalala, M., primary, Chiroleu, F., additional, Giraud-Carrier, C., additional, Hoareau, M., additional, Zinga, I., additional, Randriamampianina, J. A., additional, Velombola, S., additional, Ranomenjanahary, S., additional, Andrianjaka, A., additional, Reynaud, B., additional, Lefeuvre, P., additional, and Lett, J.-M., additional

Published
2014
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37. L'amélioration des plantes tropicales

Author

Marchand, J.L., Berthaud, Julien, Clerget, B., Dintinger, J., Reynaud, B., Dzido, J.L., Charrier, A. (ed.), Jacquot, M. (ed.), Hamon, Serge (ed.), and Nicolas, D. (ed.)

Subjects
SELECTION, PLANTE CULTIVEE, HYBRIDATION, PLANTE SAUVAGE, AMELIORATION GENETIQUE, AMELIORATION DES PLANTES, DIVERSITE SPECIFIQUE, AMELIORATION VARIETALE, TRANSFERT DE GENE
Published
1997

38. Study of the pathosystem: Begomovirus Bemisia tabaci I tomato on the South West islands of the Indian Ocean

Author

Goldbach, R.W., Reynaud, B., Peterschmitt, M., Delatte, H., Goldbach, R.W., Reynaud, B., Peterschmitt, M., and Delatte, H.

Abstract

Tomato yellow leaf curl virus (TYLCV) belongs to the genus Begomovirus within the Geminiviridae family, and is exclusively transmitted by the whitefly species Bemisia labaci (Hemiptera: Aleyrodidae) (Gennadius). It is an emerging virus which since the 1980's has globally spread over many tropical, subtropical, and Mediterranean countries. By now it has even reached such isolated places as La Réunion, an island situated in the south-western part of the Indian Ocean. Since its first introduction in 1997, the virus has spread quickly throughout this island, becoming a great constraint for tomato cultivation. At the same time an upsurge of whiteflies was reported on vegetable crops.For future control and prevention of begomovirus infestations on La Réunion further information on the identity and genetic properties of the introduced begomoviruses and on the whiteflies involved is urgenily needed. The aim of the studies presented in this thesis was, therefore, to investigate how new begomoviruses can potentially be introduced in La Reunion, which begomoviruses are currently present and which whitefly biotypes are involved in their spread. Also a start was made to search for useful resistance sources in a range of available wild Lycopersicon accessions.In Chapter 2, a potential way of unintentional introduction of new begomoviruses into an area free of begomoviruses was investigated- In La Réunion, and other areas, imported seedlings, ornamentals and all plant material are carefully checked at the custom for the presence of TYLCV or B. tabaci, due to their quarantine status, but not imported tomato fruits, as these were regarded not to represent a great risk. In view of the possibility that a potential import route had escaped attention, a survey of tomatoes imported into La Réunion had been made and it was demonstrated (Chapter 2) that more than 50% of the fruits contained TYLCV as determined by DNA blot analysis. Furthermore it was demonstrated that TYLCV can be acquired

Published
2005

39. South West Indian Ocean islands tomato begomovirus populations represent a new major monopartite begomovirus group

Author

Delatte, H., Martin, D.P., Naze, F., Goldbach, R.W., Reynaud, B., Peterschmitt, M., Lett, J.M., Delatte, H., Martin, D.P., Naze, F., Goldbach, R.W., Reynaud, B., Peterschmitt, M., and Lett, J.M.

Abstract

Biological and molecular properties of Tomato leaf curl Madagascar virus isolates from Morondova and Toliary (ToLCMGV-[Tol], -[Mor]), Tomato leaf curl Mayotte virus isolates from Dembeni and Kahani (ToLCYTV-[Dem], -[Kah]) and a Tomato yellow leaf curl virus isolate from Réunion (TYLCV-Mld[RE]) were determined. Full-length DNA components of the five isolates from Madagascar, Mayotte and Réunion were cloned and sequenced and, with the exception of ToLCMGV-[Tol], were shown to be both infectious in tomato and transmissible by Bemisia tabaci. Sequence analysis revealed that these viruses had genome organizations of monopartite begomoviruses and that both ToLCMGV and ToLCYTV belong to the African begomoviruses but represent a distinct monophyletic group that we have tentatively named the South West islands of the Indian Ocean (SWIO). All of the SWIO isolates examined were apparently complex recombinants. None of the sequences within the recombinant regions closely resembled that of any known non-SWIO begomovirus, suggesting an isolation of these virus populations

Published
2005

45. Tomato yellow leaf curl virus can be acquired and transmitted by Bemisia tabaci (Gennadius) from tomato fruits

Author

Delatte, H., Dalmon, A., Rist, D., Soustrade, I., Wuster, G., Lett, J.M., Goldbach, R.W., Peterschmitt, M., Reynaud, B., Delatte, H., Dalmon, A., Rist, D., Soustrade, I., Wuster, G., Lett, J.M., Goldbach, R.W., Peterschmitt, M., and Reynaud, B.

Abstract

The whitefly Bemisia tabaci is an insect pest causing worldwide economic losses, especially as a vector of geminiviruses such as Tomato yellow leaf curl virus (TYLCV). Currently, imported and exported tomato fruit are not monitored for TYLCV infection because they are not considered to represent a potential risk as a virus source for whiteflies. A survey of tomato fruit imported into Reunion Island indicated that more than 50% of the fruit contained TYLCV as determined by DNA blot analysis. Moreover, we showed that TYLCV was present at a high titer in tomato fruit, and demonstrated that it can be acquired by whiteflies and subsequently transmitted to healthy tomato plants. Potential risk of the spread of TYLCV by tomato fruit in natural conditions needs to be further assessed.

Published
2003

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