RESISTANCE OF BAIT GRANULATED DISTRIBUTED IN BULK AND BAIT HOLDER TO ACTION OF HUMIDITY IN AREAS OF TO ACTION OF MOISTURE IN Pinus taeda PLANTING IN SOUTHERN HIGHLANDS CATARINENSE

• Autor(a) principal: Buratto, David Alexandre
• Data de Publicação: 2017
• Outros Autores: Sousa, Nilton José, Souza, Marcelo Dias, Rolin, Flávio Augusto
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Ciência Florestal (Online)
• Texto Completo: https://periodicos.ufsm.br/cienciaflorestal/article/view/28683
• topic: Acromyrmex; sulfluramid; leaf-cutting ants.; Acromyrmex; sulfluramida; formiga-cortadeira.

Control programs for leaf-cutting ants of the genus Acromyrmex in southern Brazil are poorly founded, and its information-informed in control of the genus Atta and the damage caused by leaf-cutter ants in Eucalyptusspp. This lack of information about the controls harvester ant takes some forest companies of Santa Catarina, the repetition of patterns that are not suitable for infestations and species of leaf-cutting ants that occur in this state. With this, an inadequate distribution of bulk granular baits, the four seasons, which end up degraded by excessive moisture caused by fog and by constant rainfall occurring in the region occurs. Given this context, the experiments of this work had the following objectives: identify the species of leaf-cutting ants; determine nest density per unit area; analyze and evaluate the influence of the year and the rainfall stations in each season, about the conservation and degradation of granulated baits based on sulfluramide (0.3%) in bulk and distributed in the form of bait holder. To this end, experiments in Dois Irmãos Farm, owned by Florestal Rio Marombas company in areas of Pinus taeda L., located in the municipality of São Cristóvão do Sul, in the southern highlands of the state of Santa Catarina were installed. It was concluded that: The only species found in the leaf-cutting ant Acromyrmex crassispinus area is assessed (FOREL, 1909); At the experimental site are 17 nests, the average is 0.94 nests per hectare, less than 1 m² each apparent area; moisture from southern Santa Catarina plateau region degrades the granulated baits distributed in bulk; the granulated baits distributed in bulk remain conserved seven days in the spring and three days in other seasons; the granulated baits distributed in bait holder  remain preserved 15 days in summer and 30 days in other seasons; the bait holder display greater resistance to moisture in the field in relation to granulated baits distributed in bulk; the opening of the bait holder, caused by partial consumption of the bait, which is a feature of ants Acromyrmex spp., accelerates the deterioration of the remaining baits inside.