| Autor(es): |
Nunes, Maria A.
[1]
;
Novelli, Valdenice M.
[1]
;
da Cunha, Bruna A.
[1]
;
Soares, Alex J.
[1]
;
de Mineiro, Jeferson L. C.
[2]
;
Freitas-Astua, Juliana
[3]
;
Bastianel, Marines
[1]
Número total de Autores: 7
|
| Afiliação do(s) autor(es): | [1] Inst Agron Campinas, Ctr Citricultura Sylvio Moreira, Rodovia Anhanguera Km 158, CP 4, BR-13490970 Cordeiropolis, SP - Brazil
[2] Inst Biol, Rodovia Heitor Penteado, Km 3, 5 CP 70, BR-13001970 Campinas, SP - Brazil
[3] EMBRAPA, Mandioca & Fruticultura, Rua Embrapa S-N, BR-44380000 Cruz Das Almas, BA - Brazil
Número total de Afiliações: 3
|
Citrus leprosis (CL) is one of the most important viral diseases in sweet orange orchards in Latin America. It is caused by members of at least five species of the so-calledBrevipalpus-transmitted viruses (BTV), and the prevalent isCitrus leprosis virus C(CiLV-C). This virus has the broadest host range amongst all CL-associated viruses and is transmitted byBrevipalpus yothersi, a polyphagous mite that can colonize a large variety of host plants, including some spontaneous ground cover plants. But if, on one hand, spontaneous plants can host CL virus and vector, on the other hand, they can offer alternative food for predators, equally common in organic citrus orchards.Brevipalpus yothersiand predator mites were surveyed in 33 spontaneous plants of a Westin sweet orange orchard conducted under organic production system in Brazil, from June 2010 to April 2011. Predatory mites were identified as phytoseiids, andIphiseiodes zuluagaiwas the prevalent species, representing 58% of all predators. Other phytoseiids were considered accidental species in the area.Ageratum conyzoidesandAlternanthera tenellawere the most represented plant host species to predators, comprising 28 and 10% of the total surveyed plants, respectively.Brevipalpus yothersispecimens were detected on various spontaneous species:A. conyzoides,A. tenella,Amaranthus deflexus,Bidens pilosa,Ipomoea quamoclit,I. cairica,Merremia cissoides,Solanum americanum,Panicum maximum, and, predominantly,Commelina benghalensis. The latter has been previously reported as host of CiLV-C as well and, therefore, it is recommended to eliminate this species from citrus orchards. (AU) |