Seasonal fluctuations of citrus aphids in the East of Mazandaran and Citrus tristeza virus transmissibility by the major species

Alavi, Seyed Vahid; Rezvani, Ali

Authors

member of scientific board/ Mazandaran agricultural and natural resources research centre

Abstract

Seasonal activity of citrus aphids was monitored by direct sampling and yellow water–pan traps during 2003 and 2004, in citrus groves in Sari area of Mazandaran. Citrus tristeza virus transmission ability of the predominant aphid species was also studied. The proportions of the different aphid species from direct sampling were: Aphis gossypii (78%), Toxoptera aurantii (8%), Macrosiphum euphorbiae (8%) and Aulacarthum solani (6%) in 2003, and A. gossypii (51%), Aphis spiraecola (21%), T. aurantii (12%), Aphis fabae (9%), Aphis craccivora (3.5%), Aphis nasturtii (2%), Myzus persicae (0.5%), M. euphorbiae (0.5%) and Aphis rumicis (0.5%) in 2004. The results provided additional evidence for A.gossypii as the most common aphid species in citrus groves in this area. Transmission tests were conducted using Mexican lime seedlings as donor and receptor plants for the virus, 20 and 10 aphids of the four aphid species (A. gossypii, T. aurantii, A. spiraecola and A. fabae) were used per to infest receptor plant. Rates of the infected plants by the 20 and 10 individuals of A. gossypii were equal to 3.33 and 1.66 percents respectively and probability of the individual aphid transmission was calculated 0.17% in the two cases.
The other aphid species were not able to transmit the CTV in the East of Mazandaran. The yellow water-pan trap method had not adequate efficiency in comparison to the direct sampling of aphids. A. rumicis, A. nasturtii and A. solani were the first record of aphids fauna on citrus in the North of Iran.

Keywords

References

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Applied Entomology and Phytopathology

Seasonal fluctuations of citrus aphids in the East of Mazandaran and Citrus tristeza virus transmissibility by the major species

References

References

Volume 75, No. 1 - Serial Number 83
September 2007
Pages 39-50

Seasonal fluctuations of citrus aphids in the East of Mazandaran and Citrus tristeza virus transmissibility by the major species

References

References

Volume 75, No. 1 - Serial Number 83September 2007Pages 39-50

Volume 75, No. 1 - Serial Number 83
September 2007
Pages 39-50