Range expansion of the Litchi erinose mite Aceria litchii (Acari: Eriophyidae) in Brazil.
Fifty-eight pest species have been recorded on litchi trees worldwide, including lepidopterans, scales, stink bugs, fruit flies, and eriophiid mites, and these pest mainly damage the flowers and fruits (Waite 2012). The litchi erinose mite (LEM), Aceria litchii (Keifer) (Acari: Eriophyidae) is a major pest of litchi varieties (Menzel 2002; Paull & Duarte 2011). LEM is not visible to the naked eye. LEM is specific to litchi, affecting new shoots on the entire tree during severe infestations (Paull & Duarte 2011), and causing abnormal development and premature defoliation (Waite 2012). Litchi plants with severe erinose symptoms in young and developing leaves were detected in Brazil in Jan 2008 in an orchard of 3,000 thirteen-yr-old litchi plants of the cultivar 'Bengal' in the municipality of Limeira, Sao Paulo State. A dense population of this mite was detected during the litchi fruiting period, and this represents the first report of A. litchii in South America (Picoli et al. 2010; Raga et al. 2010).
The detection of LEM in Espirito Santo State, Brazil (S20[degrees] 20'26"-W41[degrees] 06'59", 750 m asl) in Dec 2012 represents its first range expansion in this country. The leaves (Fig. 1A), and mature litchi fruits showed mild erinose mite symptoms, but another orchard nearby had no symptoms. Infested litchi leaves with erinose mite symptoms (Fig. 1B) were collected, placed in Kraft paper bags and transported to the regional laboratory of entomology of INCAPER (Instituto Capixaba de Pesquisa, Assistencia Tecnica e Extensao Rural) from Dec 2012 to Feb 2013 to identify the mite species. These leaves were left for 2 h under direct sunlight to force the mites to leave the erineum (Waite 1992), the latter being an abnormal felty growth of hairs from the leaf epidermis. Live mites were observed under the microscope, and infested leaves were cut into 4 [cm.sup.2] pieces, preserved in 70% alcohol, and sent to Dr. Gilberto Jose de Moraes of the Laboratory of Entomology and Acarology, Escola Superior de Agricultura Luiz de Queiroz, University of Sao Paulo (ESALQ-USP), who identified them as Aceria litchii (Keifer) (Acari: Eriophyidae) (Fig. 1C). Leaves from trees of the second orchard produced by air-layering were collected, but they showed no LEM or erinose mite symptoms.
Insecticide sprays to control litchi pests, such as Tessaratoma papillosa Drury (Hemiptera: Tessaratomidae) (Zeng et al. 2001) can increase LEM populations (PIP 2011). However, no insecticides or fungicides were sprayed in the LEM-infested area. Pruning and burning of affected twigs were the adopted control measures, particularly for severely infested litchi trees. Pruning and burning reduced LEM symptoms up to 3 months when new shoots presented symptoms. Three sprays of wet-table sulphur, permitted for use on organic crops, at the 0.4% rate at 15-day-intervals were used. No pesticide is registered to control litchi pests in Brazil, although chemical products are used to control this mite in other countries (Schulte et al. 2007; Brasil 2013).
Predators are important for LEM management, particularly those of the Phytoseiidae family, but Waite (2012) reported them to have low efficiency on A. litchii. Amblyseius spp., Euseius spp., Iphiseiodes spp., Phytoseius spp., Okisieus spp., Typhlodromus spp. (Acari: Phytoseiidae), and Agistemus spp. (Acari: Stigmaeidae) are associated with LEM worldwide, including Brazil (Picoli et al. 2010). The number of species and endemism of predatory Phytoseiidae mites are high in the Neotropical region (Tixier et al. 2008). Detection of predatory mites is important for the biological control of A. litchii.
LEM and its damage should be sampled in the litchi orchards in Espirito Santo State, Brazil. The expansion of the LEM on litchi into a second Brazilian state and measures for its management are presented.
To the "Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)", "Coordenacao do Aperfeicoamento de Pessoal de Nivel Superior (CAPES)", "Fundacao de Amparo a Pesquisa do Espirito Santo (FAPES)", and "Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG)" for financial support. To Dr. Gilberto Jose de Moraes for the mite identification. Global Edico Services edited and proofread this manuscript.
Caption: Fig. 1. A. Eighteen year old litchi tree damaged by Aceria litchii (Acari: Eriophyidae); B. Variations in leaf maturation and damage; and C., Aceria litchii. The infested orchard was located in the municipality of Venda Nova do Imigrante, Espirito Santo State, Brazil.
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MAURICIO JOSE FURNAZIER (1,4), DAVID DOS SANTOS MARTINS (1), DEBURA LORENQAO FURNAZIER (2), LETIOIA HENRIQUE AZEVEDO (3), JOSE SALAZAR ZANUNCIO JR (1) AND JOSE COLA ZANUNCIO (4), *
(1) Instituto Capixaba de Pesquisa, Assistencia Tecnica e Extensao Rural--Incaper, Rua Afonso Sarlo, 160, Bento Ferreira, 29052-010, Vitoria, ES, Brazil
(2) Centro de Ciencias Agrarias, Universidade Federal do Espirito Santo, Alto Universitario, Cx. Postal 16, 29500-000, Alegre, ES, Brazil
(3) Escola Superior de Agricultura Luiz de Queiroz. Avenida Padua Dias, 11, Cx. Postal 9, 13418-900, Piracicaba, SP, Brazil
(4) Departamento de Entomologia, Universidade Federal de Vicosa. 36570-000, Vicosa, MG, Brazil
* Corresponding author; E-mail: firstname.lastname@example.org
Please note: Some tables or figures were omitted from this article.
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|Title Annotation:||Scientific Notes|
|Author:||Fornazier, Mauricio Jose; Martins, David Dos Santos; Fornazier, Debora Lorencao; Azevedo, Leticia He|
|Date:||Jun 1, 2014|
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