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| Author(s): |
Antonio Maria das Chagas Pessoa
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Piracicaba. |
| Institution: | Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) |
| Defense date: | 2002-10-29 |
| Advisor: | Evoneo Berti Filho |
| Abstract | |
This research deals with the evaluation of the thermorectificated wood of Eucalyptus grandis, against the attack of the drywood termite Cryptotermes brevis. The termites were reared in the laboratory of the Dept. of Entomology, Plant Pathology and Agricultural Zoology. Following the methodology proposed by Pincelli (1999) the wood was thermorectificated in an automatic oven at the Dept. of Forest Sciences. Both Departments belong to the College of Agriculture Luiz de Queiroz, University of São Paulo, in Piracicaba, State of São Paulo, Brazil. The wood thermorectification was performed at 5 temperatures: 120°C, 140 °C, 160°C, 180 °C, and 200°C, with 2 replications per temperature. To evaluate the association wood and termite it was used a totally random experimental outline, with 7 treatments (T1 - wood dried at 100°C, T2 - wood thermorectified (wt) at 120°C, T3 - wt at 140°C, T4 - wt at 160°C, T5 - wt at 180°C, T6 - wt at 200°C, T7 - wood dried at environmental temperature) and 15 replic ations. Each replication received 30 termite specimens (38 nymphs and 2 soldiers ones). The results were as follows: according to the increase in temperature one observes a tendency in the increasing of wood mass loss; wood thermally treated is not resistant to termite attack; the highest termite mortality was observed at the 200°C treatment, while the lowest one occurred in the check; a high number of alates was observed at the 180°C treatment whilst this number was low at the 100°C. (AU) | |