Resumo

LEON M, Guillermo; ROY, Avijit; CHOUDHARY, Nandlal  e  BRLANSKY, Ronald. Citrus leprosis transmission by Brevipalpus yothersi mites through non citrus hosts. Corpoica cienc. tecnol. agropecu. [online]. 2017, vol.18, n.2, pp.307-319. ISSN 0122-8706.  https://doi.org/10.21930/rcta.vol18_num2_art:633.

Citrus leprosis virus (CiLV) was detected in Colombia at the eastern plains in 2004; it is a threat the disease spreads to other regions of the country. The main vector is Brevipalpus yothersi Baker (formerly identified as Brevipalpusphoenicis). This research determined the viability of B. yothersi to transmit CiLV to citrus plants, after been hosted in non-citrus plants. To virus acquisition, mites spent three days on symptomatic orange (Citrus x sinensis) leaves positives to CiLV-C2; then mites were placed on six non-citrus plants (Dieffenbachia sp., Hibiscus rosa-sinensis, Codiaeum variegatum, Swinglea glutinosa, Sida acuta and Stachytarpheta cayennensis). A randomized design with 6 treatments and 4 replicates was carried out. After scheduled time in non-citrus plants, mites were three days relocated on C. x sinensis healthy plants. Leaves of receptor plants, were evaluated to the occurrence or absence of symptoms and collected for RT-PCR tests. B. yothersi mites were able to transmit the CiLV virus over 85 % of Valencia orange plants (Citrus x sinensis L.), after feeding from 2-20 days on non-citrus host plants. The first leprosis symptoms on C. x sinensis leaves was confirmed from 14 to 51 days after transmission. The present research work further established that CiLV-C2 is a persistently transmitted virus. The implement quarantine diagnostic measures to prevent spread of CiLV to disease-free zones is suggested.

Palavras-chave : CiLV-C2; Citrus; Disease transmission; Vectors; Viruses.

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