OCCURRENCE AND DAMAGE OF TERMITES IN WOOD OF Acacia mearnsii (FABACEAE) IN TWO DECAYING FIELDS (SCIENTIFIC NOTE)
DOI:
https://doi.org/10.4322//rif.2015.015Keywords:
deterioration, natural durability, monitoring, xylophagous organisms, IsopteraAbstract
Understand the relationship between plague and environment is the basis for an appropriate management in timber industry, as well as the search for information on wood quality of exotic species, which are alternatives to its demand. In this way, the work aimed to check the occurrence and damage of termites in wood of Acacia mearnsii De Wild. (Fabaceae) in two rotting field. The experiment was accomplished in pasture area and native forest. The evaluation was performed visually, with assignment of notes according to the phytosanitary state of each piece. Round fence posts were divided into: underground part (contact with soil) and shoot (part of round fence posts located above the ground). Termites have attacked only parts in native forest, no occurring insect damage in the pasture area. The influence of the organisms was determined by the rate of deterioration – I.D. wherein the seven pieces of underground part present in native forest, four suffered moderate attack four suffered moderate attack (I.D. = 70), one presented intense attack (I.D. = 40) and and two presented light or superficial attacks (I.D. = 90). There was little damage when analyzed only the aerial part, being assigned I.D. 90, general gentle attack. The results were associated to soil and climate characteristics in each environment, and in the development of native forest termites was better due to the lower ambient temperature, higher relative humidity, less air movement, higher porosity and lower bulk density of the soil.
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References
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