Resistência das madeiras de pinus, cedro australiano e seus produtos derivados ao ataque de Cryptotermes brevis

CERNE

Mendes, Lourival Marin²  Santos, Alexandre dos²  Ribeiro, Marcelo Xisto³  Tonoli, Gustavo Henrique Denzin²  Bufalino, Lina¹  Sá, Vania Aparecida de² 

[1] Universidade do Estado do Amapá, Macapá, Brasil$$;Universidade Federal de Lavras, Lavras, Brasil$$;Universidade Federal do Piauí, Bom Jesus, Brasil$$

关键词: Biological resistance;    Biodegradation;    Natural durability.;   

DOI  :  10.1590/01047760201420031277

来源: Universidade Federal de Lavras-UFLA

【 摘 要 】

The aim of this work was to compare the resistance of Australian red cedar (Toona ciliata) and pine (Pinus sp.) woods and particleboards made from these species to dry-wood termite Cryptotermes brevis attack, as much as to quantify the mortality of the insects. 30 termite pseudo-workers were put in each 9,5 cm-diameter Petri dishes containing the samples (1,5 x 1,5 x 0,5 cm) and cotton sheets positioned on the perforated covers, daily moisturized with 5 ml of water. The dishes were maintained in BOD (Biological Oxygen Demand) at 24±5 ºC and 24 h of escotophase. A control sample without any feed source was included in the bioassay. The deterioration index (ID) and mortality of the insects were evaluated after 60 days. Termites from the control sample presented higher termite mortality than the other treatments, which did not differ among each other. Toona ciliata wood was more resistant than Pinus sp. wood to Cryptotermes brevis attack. The average deterioration indexes were 1.74% and 6.62% respectively for those woods. The average deterioration index of the panels made with 100% Toona ciliata (ID=1.58%) was similar to the deterioration index of particleboards made with this specie mixed with Pinus sp. (ID=1.87%).

【 授权许可】

Unknown