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Jean Etienne

Bio: Jean Etienne is an academic researcher from Institut national de la recherche agronomique. The author has contributed to research in topics: Acalitus & Eriophyidae. The author has an hindex of 8, co-authored 29 publications receiving 436 citations.

Papers
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Journal ArticleDOI
01 Sep 2001-Fruits
TL;DR: Quite favorable biological characteristics play a great part in explaining the excellent effec- tiveness of T. radiata in biological control programmes against D. citri.
Abstract: Introduction. The Asian citrus psyllid, Diaphorina citri Kuwayama, is particu- larly harmful to citrus plantations as it is one of the two psyllid vectors of the citrus greening disease or Huanglongbing. This disease, which limits the longevity of trees, is due to an intra- cellular bacterium which mainly affects the phloem. Past experience of biological control of D. citri in Reunion Island. In Reunion Island, this disease, detected in 1967, was the main obstacle to the development of the cultivation of citrus fruit. Control of the vector D. citri, by introducing from India and multiplying on site the specific parasitoid Tamarixia radiata (Waterston), was carried out during 1978 when nearly 4600 adult parasitoids were released. The success of T. radiata combined with the distribution of healthy plant material was at the origin of the revival of the cultivation of citrus fruit in Reunion Island. Programme for a biological control of D. citri in Guadeloupe. In Guadeloupe, D. citri was reported in Jan- uary 1998. No trace of insect parasitism was found and only one fungus, Hirsutella citriformis Speare, proved, under certain conditions, capable of regulating the populations of this psyl- lid. Taking into account the experience in Reunion Island and that the greening disease has not shown up in Guadeloupe, the introduction of T. radiata from Reunion Island was made in January 1999. About 1000 T. radiata were released all over the Guadeloupe islands. At pres- ent, just a little more than 1 year after the last releases, the parasitoid is established and pres- ent in almost all the citrus orchards where psyllid populations have decreased considerably. Quite favorable biological characteristics play a great part in explaining the excellent effec- tiveness of T. radiata in biological control programmes against D. citri. France (Reunion) / France (Guadeloupe) / Citrus / Diaphorina citri / Tamarixia radiata / insect control / biological control organisms

139 citations

Journal ArticleDOI
TL;DR: The red palm mite, Raoiella indica Hirst, is reported for the first time from the Americas, in Martinica.
Abstract: The red palm mite, Raoiella indica Hirst. is reported for the first time from the Americas, in Martinica.

107 citations

Journal ArticleDOI
TL;DR: The red palm mite, Raoiella indica Hirst (Prostigmata: Tenuipalpidae), described in 1924 from coconut leaves in India, spread to the Near East, Mauritius, Reunion and Russia and became an important pest.
Abstract: (2006). First Record of Raoiella indica (Hirst, 1924) (Acari: Tenuipalpidae) in Guadeloupe and Saint Martin, West Indies. International Journal of Acarology: Vol. 32, No. 3, pp. 331-332.

66 citations

Journal ArticleDOI
10 Dec 2008
TL;DR: Ten species of Agromyzidae of agronomic interest in Texcoco, (state of Mexico); Altamira, ( state of Tamaulipas), Magdalena Contreras, (Mexico City), and Nativitas, (State of Tlaxcala) are presented.
Abstract: Ten species of Agromyzidae of agronomic interest in Texcoco, (state of Mexico); Altamira, (state of Tamaulipas), Magdalena Contreras, (Mexico City), and Nativitas, (state of Tlaxcala) are presented. A description of the adults, their geographic distributions and their host plants, are provided. In addition a key with photographs of the aedeagus and sperm pumps of all species are provided. The species

25 citations

01 Jan 2006
TL;DR: A survey of the scale insects fauna is given mainly for Guadeloupe and Martinique and 7 neighbouring islands and a catalogue of the host-plants is given including 78 families.
Abstract: Scale insects from Guadeloupe, Martinique and some neighbouring islands in the Caribbean. A survey of the scale insects fauna is given mainly for Guadeloupe and Martinique and 7 neighbouring islands. 140 species are listed on 8 families. 6 records are new for the neotropical region. 4 records are new for the Caribbean. 66 records are new for Guadeloupe. 27 are new for Martinique. A catalogue of the host-plants is given including 78 families.

18 citations


Cited by
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Journal ArticleDOI
TL;DR: Management of citrus greening disease is difficult and requires an integrated approach including use of clean stock, elimination of inoculum via voluntary and regulatory means, use of pesticides to control psyllid vectors in the citrus crop, and biological control of psyllID vectors in non-crop reservoirs.
Abstract: The Asian citrus psyllid, Diaphorina citri Kuwayama, was discovered in Florida in 1998. It can be one of the most serious pests of citrus if the pathogens that cause citrus greening disease (huanglongbing) are present. Citrus greening recently has been reported in Brazil by Fundecitrus, Brazil. The establishment of D. citri in Florida increases the possibility that the disease may become established. Diaphorina citri can be separated from about 13 other species of psyllids reported on citrus. The biology of D. citri makes it ideally suited to the Florida climate. Only two species, D. citri and Trioza erytreae (del Guercio), have been implicated in spread of citrus greening, a disease caused by highly fastidious phloem-inhabiting bacteria. The disease is characterized by blotchy mottle on the leaves, and misshapen, poorly colored off-tasting fruit. In areas where the disease is endemic, citrus trees may live for only 5-8 years and never bear usable fruit. The disease occurs throughout much of Asia and Africa south of the Sahara Desert, on several small islands in the Indian Ocean, and in the Saudi Arabian Peninsula. Transmission of citrus greening occurs primarily via infective citrus psyllids and grafting. It is transmissible experimentally through dodder and might be transmitted by seed from infected plants and transovarially in psyllid vectors. Citrus greening disease is restricted to Citrus and close citrus relatives because of the narrow host range of the psyllid vectors. Management of citrus greening disease is difficult and requires an integrated approach including use of clean stock, elimination of inoculum via voluntary and regulatory means, use of pesticides to control psyllid vectors in the citrus crop, and biological control of psyllid vectors in non-crop reservoirs. There is no place in the world where citrus greening disease occurs that it is under completely successful management. Eradication of citrus greening disease may be possible if it is detected early. Research is needed on rapid and robust diagnosis, disease epidemiology, and psyllid vector control.

946 citations

Journal ArticleDOI
TL;DR: Recent advances in the understanding of D. citri biology and behavior, pathogen transmission biology, biological control, and chemical control with respect to "Candidatus Liberibacter asiaticus" are discussed.
Abstract: The Asian citrus psyllid, Diaphorina citri Kuwayama (Hemiptera: Psyllidae), is the most important pest of citrus worldwide because it serves as a vector of "Candidatus Liberibacter" species (Alphaproteobacteria) that cause huanglongbing (citrus greening disease). All commercially cultivated citrus is susceptible and varieties tolerant to disease expression are not yet available. Onset of disease occurs following a long latent period after inoculation, and thus the pathogen can spread widely prior to detection. Detection of the pathogen in Brazil in 2004 and Florida in 2005 catalyzed a significant increase in research on D. citri biology. Chemical control is the primary management strategy currently employed, but recently documented decreases in susceptibility of D. citri to several insecticides illustrate the need for more sustainable tools. Herein, we discuss recent advances in the understanding of D. citri biology and behavior, pathogen transmission biology, biological control, and chemical control with respect to "Candidatus Liberibacter asiaticus." Our goal is to point toward integrated and biologically relevant management of this pathosystem.

517 citations

Journal ArticleDOI
TL;DR: An updated review of ACP and HLB is presented with an emphasis on the problem in Florida, where the geographic range of the disease is expanding, threatening citrus industries in new areas.
Abstract: The Asian citrus psyllid (ACP), Diaphorina citri Kuwayama (Hemiptera: Psyllidae), is an important pest of citrus because it transmits phloem-limited bacteria [Candidatus Liberibacter spp., notably Ca. L. asiaticus (LAS)] associated with huanglongbing (HLB; citrus greening disease), currently considered the world's most serious disease of citrus. Asian citrus psyllid transmits LAS in a persistent manner and, although the rate of LAS transmission by ACP individuals usually is low, HLB can spread rapidly in a citrus grove and the geographic range of the disease is expanding, threatening citrus industries in new areas. Intensive chemical control of ACP is the primary management strategy currently advocated for HLB, but this strategy is costly, unsustainable, and generally ineffective. The scientific community is searching aggressively for solutions to HLB on many fronts, but it could still be years before solutions are found and implemented. Plant resistance to LAS is one area of research being pursued, whereby traits that confer resistance are identified and incorporated into citrus germplasm through conventional or transgenic methods. It remains to be seen if a solution to HLB can be found that specifically targets ACP, but research on ACP has been stepped up in a number of areas, notably on ACP–LAS–plant interactions, on host plant resistance to ACP, and on molecular methods of silencing ACP genes to induce mortality or to block its ability to transmit HLB-causing bacteria. Advancements in these and other research areas may depend greatly on a better understanding of basic ACP biology and vector–pathogen–host plant interactions at the molecular, cellular, and community levels. Here, we present an updated review of ACP and HLB with an emphasis on the problem in Florida.

376 citations

Journal ArticleDOI
TL;DR: The results indicate that coccinellid beetles are the most important biological control agents of high-density D. citri populations in central Florida and that intraguild predation causes >95% mortality of immature stages of T. radiata.

258 citations