ALBUQUERQUE, F. C. de

BENCHIMOL, R. L.

POLTRONIERI, L. S.

TRINDADE, D. R.

English

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778 Fitopatol. bras. 26(4), dezembro 2001WHITE-THREAD BLIGHT: FIVE NEW HOSTS IN THE STATE OF PARÁ, BRAZILRUTH L. BENCHIMOL, LUIZ S. POLTRONIERI, DINALDO R. TRINDADE & FERNANDO C. ALBUQUERQUEEmbrapa Amazônia Oriental, Cx. Postal 48, 66017-970, Belém, PA, fax: (91) 276-9845,e-mail: rlinda@cpatu.embrapa.br(Accepted for publication on 26/06/2001)Corresponding author: Ruth L. BenchimolRESUMOQueima-do-fio: cinco novos hospedeiros no Estado do Pará, BrasilLevantamentos na região Bragantina, PA, detectaramo ataque de Ceratobasidium stevensii em Neem (Azadirachtaindica), mogno africano (Khaya ivorensis), coqueiro (Cocosnucifera), bananeira (Musa sp., cv. yangambi) e Ixora (Ixoracoccinea). A patogenicidade de C. stevensii foi comprovadapara cada hospedeiro.Since the first description of Pellicularia kolerogaCooke, at present classified as Ceratobasidium stevensii (Burt)Venkat. (sin: Corticium koleroga (Cooke) v. Höhn., Koleroganoxia Donk, Botryobasidium koleroga Cooke) by Deslandes(Bol. Fitossanitário 1:197, 1944), more than 40 importantagricultural and forestry species were reported to be damagedby the white-thread blight, making evident the importance ofthat pathogen to the Amazon region (Albuquerque, SeminárioTécnico, EMBRAPA-IPEAN, 1973; Silva et al., Fitopatol.bras., 8:601, 1983; Lourd & Alves, Fitopatol. bras., 12:88,1987; Furtado, Manual de Fitopatol., 1997; Benchimol &Müller, Embrapa-CPATU, Comunicado Técnico 99, 1999;Gasparotto & Silva, Fitopatol. bras., 24:469, 1999).C. stevensii penetrates the plant by natural chaps ortwig axils, showing up as whitish mycelial cords(rhizomorphs) that develop upon the host twigs and leaves,causing them to dry. The dead leaves remain hanged on thetwigs by the pathogen mycelium as a characteristic sign ofthe white-thread blight (Figure 1). Morphological  andphysiological characteristics of the pathogen and diseasecontrol were described by Roger, L. (Phytopathologie des PaysChauds, Lechevalier, 1949).Surveys on Bragantina region plantings, State of Pará,Brazil, detected damages caused by C. stevensii on Neem(Azadirachta indica A. Juss.), African mahogany (Khayaivorensis A. Chev.), coconut (Cocos nucifera L.), banana(Musa L. cv. yangambi) and ornamental Ixora (Ixora coccineaL.). Reproduction of white-thread blight symptoms undergreenhouse conditions was obtained about one week aftermycelial PDA plug inoculation on the abaxial face of theyoung leaves of these hosts left in a dew chamber for 48 h.FIG. 1 - Signs of Ceratobasidium stevensii (arrows) on  (a)K. ivorensis; (b) A. indica; (c) I. coccinea; (d) C.nucifera; (e) Musa sp.00010NOTAS FITOPATOLÓGICAS / PHYTOPATHOLOGICAL NOTESa bdc e

White-thread blight: five new hosts in the State of Pará, Brazil.

http://www.alice.cnptia.embrapa.br/bitstream/doc/403859/4/8191.pdf

White-thread blight: five new hosts in the State of Pará, Brazil.

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