Survey for Citrus diseases in French Guiana

International audienceThe presence on the South American continent of major threats for citrus orchards in French Guiana required a survey to assess the situation of citrus pathogens in the territory. Because there is a risk of introduction of pathogens from neighboring countries, orchards in the different areas of production were investigated for citrus pathogens on the basis of field symptoms. Citrus tristeza virus is present in all areas, and psorosis symptoms were observed in one orchard. Other diseases such as Huanglongbing, citrus variegated chlorosis, sudden death and leprosis were not observe

Les risques sanitaires lors des échanges de matériel végétal

National audienceAfin de réduire les risques sanitaires lors des échanges de matériel de multiplication, des mesures réglementaires existent au niveau européen (directive 2000/29, CAC) ou français (certification). Certaines règles sont fixées pour la réalisation des analyses officielle

L'incidence du Phytophthora sur le pathosystème des agrumes

National audienc

Survey for Citrus diseases in French Guiana

International audienceThe presence on the continent of major threats for Citrus orchards has required a survey to assess the situation of Citrus pathogens in the French territory of Guiana. Agriculture in French Guiana is located on the coast (about 300 Kms from west to east and 50 Km wide). There are 1200 Ha of Citrus orchards (Ministry of Agriculture). Citrus are grown either for export (Tahiti lime) or for local consumption : sweet oranges, tangerines and hybrids. Trees are grafted on Carrizo citrange, Rough lemon and C.volkameriana. The propagative material is issued from certified material from INRA Corsica. Some growers pick budwoods on local trees, probably all infected by CTV. Some trees enter illegally from Surinam. Because of the situation of the territory in the north of Brazil there are many threats for Citrus production. Orchards in the different areas of production have been investigated for Citrus pathogens on the basis of field symptoms. There has not been a specific search for insects because the situation has been previously assesse

Les risques sanitaires lors des échanges de matériel végétal

National audienceAfin de réduire les risques sanitaires lors des échanges de matériel de multiplication, des mesures réglementaires existent au niveau européen (directive 2000/29, CAC) ou français (certification). Certaines règles sont fixées pour la réalisation des analyses officielle

The French Citrus certification scheme

International audienc

LAMP, Loop-mediated isothermal AMPlification. Une technique de biologie moléculaire en plein développement

National audienceLa technique d’amplification isothermale LAMP (Loop-mediated isothermal AMPlification) permet de réaliser une amplification de l’ADN à une température constante de 65 C. On peut amplifier de l’ADN sans équipement de biologie moléculaire, sans extraction et certains protocoles permettent le diagnostic au champ avec un simple bain-marie. Publiée en 2000 par Notomi, la technique a été jusqu’alors essentiellement appliquée pour la détection ou le typage de pathogènes en médecine, en médecine vétérinaire, en alimentation et en phytopathologie. L’accroissement du rythme des protocoles publiés, la mise sur le marché de kits commerciaux et d’équipements spécifiques laissent entrevoir un développement rapide de cette technique pour de nombreux utilisateurs ainsi qu’une diversification de ses applications

The French Citrus certification scheme

International audienc

Survey for Citrus diseases in French Guiana

International audienceThe presence on the continent of major threats for Citrus orchards has required a survey to assess the situation of Citrus pathogens in the French territory of Guiana. Agriculture in French Guiana is located on the coast (about 300 Kms from west to east and 50 Km wide). There are 1200 Ha of Citrus orchards (Ministry of Agriculture). Citrus are grown either for export (Tahiti lime) or for local consumption : sweet oranges, tangerines and hybrids. Trees are grafted on Carrizo citrange, Rough lemon and C.volkameriana. The propagative material is issued from certified material from INRA Corsica. Some growers pick budwoods on local trees, probably all infected by CTV. Some trees enter illegally from Surinam. Because of the situation of the territory in the north of Brazil there are many threats for Citrus production. Orchards in the different areas of production have been investigated for Citrus pathogens on the basis of field symptoms. There has not been a specific search for insects because the situation has been previously assesse