Resistência natural das madeiras de sete espécies florestais ao fungo Pycnoporus sanguineus causador da podridão-branca

CERNE

Muniz, Marlove Fátima Brião¹  Beltrame, Rafael²  Vivian, Magnos Alan⁵  Lazarotto, Marília²  Santini, Elio José⁴  Modes, Karina Soares³ 

[1] Engenheira Agrônoma, Professora Doutora em Fitotecnia - Universidade Federal de Santa Maria, Santa Maria, Brasil$$;Engenheiro Florestal, Doutorando em Engenharia Florestal - Universidade Federal de Santa Maria, Santa Maria, Brasil$$;Engenheira Florestal, Professora Mestre em Engenharia Florestal - Universidade Federal de Rondônia, Rolim de Moura, Brasil$$;Engenheiro Florestal, Professor Doutor em Engenharia Florestal - Universidade Federal de Santa Maria, Santa Maria, Brasil$$;Engenheiro Florestal, Doutorando em Recursos Florestais - Universidade de São Paulo, Piracicaba, Brasil$$

关键词: Xylophagous fungi;    natural durability;    accelerated decay.;   

DOI  :  10.1590/S0104-77602012000300007

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

This research evaluated the natural resistance of: Platanus x acerifolia, Luehea divaricate, Carya illinoinensis, Peltophorum dubium, Araucaria angustifolia, Eucalyptus grandis and Hovenia dulcis, to accelerated decay of the white-rot fungus Pycnoporus sanguineus. The Specific Density at 12% was determinated. The accelerated decay test was conducted with glass bottles (capacity of 500 mL) filled with 100 g of moist soil, autoclaved, and kept at 25 ºC. The initial establishment of fungal colonies on plates was supported by samples of Pinus elliottii sapwood. In this study, three samples of dimensions 9.0 x 25.0 x 25.0 mm were used for each species evaluated and, after 16 weeks of incubation, the percentage loss of mass was calculated. The degree of natural resistance was performed according to the percentages of mass loss. The results obtained from weight loss were compared by Tukey test at 5%. The natural resistance of woods was not influenced by specific gravity. The wood of Carya illinoinensis, Eucalyptus grandis, Platanus x acerifolia, Luehea divaricata and Peltophorum dubium were classified as very resistant, Houvenia dulcis as resistant and Araucaria angustifolia as moderate resistant.

【 授权许可】

Unknown