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Selectivity of sulfentrazone applied in different soils to eucalyptus

Grant number: 12/04606-8
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): June 01, 2012
Effective date (End): May 31, 2013
Field of knowledge:Agronomical Sciences - Forestry Resources and Forestry Engineering
Principal Investigator:Caio Antonio Carbonari
Grantee:Leonardo Gueli Miranda
Home Institution: Faculdade de Ciências Agronômicas (FCA). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

The weed control in eucalyptus areas of eucalypt is high important to ensure high levels of productivity of wood and represents a significant part of the production costs to forest species. One of the herbicides registered and with good features for the control of weeds in eucalyptus is sulfentrazone that in some situations present toxicity to eucalyptus plants. The objectives of this project is to evaluate the selectivity of sulfentrazone in two eucalypt clones when applied in soils with different textures and also evaluate the availability of herbicides in two soil types and correlate with the levels of the herbicide on the leaves and the intoxication caused. The following treatments will be tested in two eucalypt clones: two soils (sandy and clay) and four doses of sulfentrazone (0.0, 0.4, 0.8 and 1.2 L c.p. ha-1). After herbicide application at different doses, the seedlings will be planted in vases and will be evaluated visually for toxicity weekly until 90 days after application. At 15, 45 and 90 days will be carried out by sampling aliquots of soil from vases and plant leaves. Tests will be done in the leaves and sulfentrazone in the soil and the leaves of porphyrins by liquid chromatography and mass spectrometry (LC/MS/MS). At the end of the experiment (90 days) will be dry and weighed the plants.