Delatte Hélène. 2000. Molecular and biological characterisation of Bemisia tabaci Gennedius (Homoptera : Aleyrodidae), vector of the tomato Yellow Leaf Curl virus in Reunion island. Wageningen : WAU, 56 p. Mémoire de master : Crop protection - virology : Wageningen Agricultural University
Encadrement : Reynaud, Bernard
Résumé : Bemisia tabaci. (Homoptera: Aleyrodidae) is among the most serious pest causing worldwide economic losses, especially as vector of Begomoviruses, which include the Tomato Yellow Leaf Curl Virus (TYLCV). Since 1997 this virus has been responsible of great losses on tomato production in Reunion island. Different analysis were made to assess the biotype status of the whiteflies populations of Reunion. The study involved observations of silverleafing. analysis of RAPD-PCR and COI sequencing, a transmission and a fecundity test. The results obtained by the first three methods were fully consistent and characterised two groups inside the biotype B, close to biotype B of Israel and Arizona. One of the group composed of Euphorbia heterophylla and Sweet potato is not similar at 5% to the B cluster which includes the other part of the populations from Reunion. No distinction could be done at the fecundity level for Cabbage and Euphorbia heterophylla biotype. However a very high influence of host plant is noticeable. Cabbage and Euphorbia heterophylla plants appear to be the best host plants for Bemisia. Two different clusters of transmission rate were found for the different lines, rating from 10% to 30% and 30% to 60%. Females were a better vector of the TYLCV than males (two-fold).
Classification Agris : H10 - Ravageurs des plantes
Auteurs et affiliations
- Delatte Hélène, CIRAD-AMIS-PROTECTION DES CULTURES (REU)
Autres liens de la publication
Source : Cirad - Agritrop (https://agritrop.cirad.fr/476290/)
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