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Paes J.B.,University of Madeira | de Melo R.R.,Federal University of Mato Grosso | da Silva Guedes R.d.,Federal University of Campina Grande | de Souza P.F.,University Of Brasi Lia Unb
Floresta e Ambiente | Year: 2014

The aim of the present study was to analyze the efficiency of CCB-oxide on the resistance of Leucaena leucocephala wood to Nasutitermes corniger termite under food preference test. A total of 12 trees with diameters at breast height ranging from 6.0 to 12.0 cm were harvested in the municipality of Patos, Parai´ba state, Brazil. The trunks were severed into 2.0 m parts and peeled. A solution of 2% active ingredients of CCB-oxide was used. The pieces were submerged (50 cm from the base) in the treatment solution for 3, 6, 9 and 12 days and the penetration and retention of the solution was determined at 50 and 100 cm from the base. Samples of 1.5 × 1.5 × 15.0 cm were collected between these positions and submitted to termite attack for 45 days. The treatment has improved the resistance of Leucaena leucocephala wood to xylophagous termites, and the 12-day-long treatment promoted adequate protection to the wood.

Piontekowski V.J.,University Of Brasi Lia Unb | Matricardi E.A.T.,University Of Brasi Lia Unb | Pedlowski M.A.,State University of Norte Fluminense | Fernandes L.C.,Secretaria de Estado do Desenvolvimento Ambiental de Rondonia SEDAM
Floresta e Ambiente | Year: 2014

The goal of this study was to assess the accuracy of deforestation maps produced by the National Institute for Spatial Research (INPE) and the Rondoˆnia State Secretariat of Environmental Development (SEDAM) for the state of Rondoˆnia between 2001 and 2011. Our results show that the deforestation mappings conducted by SEDAM and PRODES-INPE present similar Kappa coefficients, which were estimated at 0.89 and 0.87, respectively. The deforestation datasets prepared by PRODES and SEDAM show a decrease in deforestation rates in Rondoˆnia state in the study period. However, there was a significant increase in illegal deforestation (approximately 400% within the protected areas) in this period. Based on the deforestation trend observed in the past decade, we can affirm that forests inside protected areas are the main targets for deforestation in Rondoˆnia state.

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