Floresta e Ambiente
http://floram.org/article/doi/10.1590/2179-8087.026717
Floresta e Ambiente
Original Article Silviculture

Susceptibility of Pecan Cultivars to Cladosporium cladosporioides Species Complex

Clair Walker; Marlove Muniz; Ricardo de Oliveira Martins; Jéssica Rabuske; Alvaro Figueredo dos Santos

Abstract

ABSTRACT: Recent studies have observed symptoms of leaf spot in pecan (Carya illinoinensis ) associated with species of the Cladosporium cladosporioides complex (C. cladosporioides, C. pseudocladosporioides , and C. subuliforme). Therefore, the present study aimed to investigate the pathogenicity of these Cladosporium spp. isolated from two pecan cultivars. Twenty-six isolates were used to inoculate leaflets of the cultivars, 'Barton' and 'Shawnee', with a spore suspension. The suspension was applied through drops on the surface of the leaflets, the material was kept in boxes, “gerbox”, in the incubation room. After 22 days, leaf spots varied from small circular brown to black stains, which indicated the advancement of the disease. The three Cladosporium sp. were pathogenic to pecan cultivars and there was a difference in susceptibility to C. pseudocladosporioides species between the 'Barton' and 'Shawnee' cultivars, where 'Shawnee' showed greater disease severity.

Keywords

Carya illinoinensis , susceptibility, inoculation, breeding program, scab

References

Anilkumar TB, Seshadri VS. Cladosporium leaf spot of sunflower. Current Science 1975; 44: 722.

Bensch K, Groenewald JZ, Dijksterhuis J, Starink-Willemse M, Andersen B, Summerell BA et al. Species and ecological diversity within the Cladosporium cladosporioides complex (Davidiellaceae, Capnodiales). Studies in Mycology 2010; 67: 1-94. http://dx.doi.org/10.3114/sim.2010.67.01. PMid:20877444.

Berner DK, Smallwood EL, McMahon MB, Luster DG, Kashefi J. First report of leaf spot caused by Cladosporium herbarum on Centaurea solstitialis in greece. Plant Disease 2007; 91(4): 463. http://dx.doi.org/10.1094/PDIS-91-4-0463A.

Bock CH, Wood BW, Stevenson KL, Arias RS. Genetic diversity and population structure of Fusicladium effusum on pecan in the United States. Plant Disease 2014; 98(7): 916-923. http://dx.doi.org/10.1094/PDIS-12-13-1229-RE.

Brasil. Ministério da Agricultura, Pecuária e Abastecimento. Registro Nacional de Cultivares [online]. Brasília: Ministério da Agricultura, Pecuária e Abastecimento; 2015 [cited 2015 Aug 22]. Available from: http://extranet.agricultura.gov.br/php/proton/ cultivarweb/cultivares_registradas.php

Camargo LEA. Controle genético. In: Amorim L, Rezende JAM, Bergamim A Fo, Camargo LEA. Manual de fitopatologia. 4. ed. Piracicaba: Agronômica Ceres; 2011.

College of Agricultural and Environmental Sciences – CAES. Pecan breeding: cultivar information [online]. [cited 2015 Sep 27]. 2015. Available from: http://www.caes.uga.edu/commodities/fruits/pecanbreeding/cultivars/cultivar_list.html

Conner PJ, Stevenson KL. Pathogenic variation of Cladosporium caryigenum isolates and corresponding differential resistance in pecan. HortScience 2004; 39: 553-557.

Conner PJ. A detached leaf technique for studying race-specific resistance to Cladosporium caryigenum in pecan. Journal of the American Society for Horticultural Science 2002; 127: 781-785.

Demaree JB. Pecan scab with special reference to sources or the early spring infections. Journal of Agricultural Research 1924; 38: 321-333.

Ferreira DF. SISVAR: um programa para análises e ensino de estatística. Revista Symposium 2008; 6: 36-41.

Goff WD, Nesbitt ML, Browne CL. Incidence of scab and foliage condition on pecan cultivars grown without fungicide or insecticide sprays in a humid region. HortTechnology 2003; 13: 381-384.

Gottwald TR. Taxonomy of the pecan scab fungus Cladosporium caryigenum. Mycologia 1982; 74(3): 382-390. http://dx.doi.org/10.2307/3792959.

Instituto Brasileiro de Geografia e Estatística – IBGE. Lavoura permanente [online]. Rio de Janeiro: IBGE; 2015 [cited 2015 Aug 22]. Available from: http://www.ibge.gov.br/estadosat/temas.php?sigla=rs&tema= lavourapermanente2013

Johnson JD, Black MC. Pecan disease identification and control. In: Stein LA, McEachern GR, Nesbitt ML, editors. Texas pecan handbook. USA: Texas A&M Agrilife Extension; 2012.

Lazarotto M, Bovolini MP, Muniz MFB, Harakawa R, Reiniger LRS, Santos AF. Identification and characterization of pathogenic Pestalotiopsis species to pecan tree in Brazil. Pesquisa Agropecuária Brasileira 2014b; 49(6): 440-448. http://dx.doi.org/10.1590/S0100-204X2014000600005.

Lazarotto M, Milanesi PM, Muniz MFB, Reiniger LRS, Beltrame R, Harakava R. Morphological and molecular characterization of Fusarium spp. pathogenic to pecan tree in Brazil. Genetics and Molecular Research 2014a; 13(4): 9390-9402. http://dx.doi.org/10.4238/2014.November.11.5. PMid:25501150.

Oliveira RR, Aguiar RL, Tessmann DJ, Nunes WMC, Santos AF, Vida JB. First report of leaf spot caused by Cladosporium perangustum on Syagrus oleracea in Brazil. Plant Disease 2014; 98(2): 280. http://dx.doi.org/10.1094/PDIS-06-13-0595-PDN.

Thompson TE, Conner PJ. Pecan. In: Badenes ML, Byrne DH, editors. Fruit breeding, handbook of plant breedig. USA: Springer; 2012.

Walker C, Muniz MFB, Martins RRO, Mezzomo R, Rolim JM, Blume E. First report of species in the Cladosporium cladosporioides complex causing pecan leaf spot in Brazil. Journal of Plant Pathology 2016a; 98(2): 12.

Walker C, Muniz MFB, Rolim JM, Martins RRO, Rosenthal VC, Maciel CG. et al. Morphological and molecular characterization of Cladosporium cladosporioides species complex causing pecan tree leaf spot. Genetics and Molecular Research 2016b; 15(3): gmr.15038714. PMID: 27706736. http://dx.doi.org/10.4238/gmr.15038714.

Yates IE, Maxey D, Lee S, Sparks D, Reilly CC. Developing the pecan scab fungus on susceptible and resistant host and nonhost leaves. Journal of the American Society for Horticultural Science 1996; 121: 350-357.

Zheng C, Liu ZH, Tang SS, Lu D, Huang XY. First report of leaf spot caused by Cladosporium oxysporum on greenhouse eggplant in China. Plant Disease 2014; 98(4): 566. http://dx.doi.org/10.1094/PDIS-06-13-0606-PDN.
 

5b683eab0e8825700a70de5d floram Articles
Links & Downloads

FLORAM

Share this page
Page Sections