Paclobutrazol degradation in tropical soils.
Silva C. M. M. de S., Fay E. F., Vieira R. F.
Author Affiliation: Embrapa-Centro Nacional de Pesquisa de Monitoramento e Avaliação de Impacto Ambiental, Caixa Postal 69, CEP 13820-000 Jaguariúna, SP, Brazil.
Pesquisa Agropecuária Brasileira 38 : 1223-1227
Abstract : A study was conducted to evaluate the degradability of paclobutrazol in soil. Soil samples were collected in orchards of two main mango production regions for exportation, at Petrolina, PE and Lins, Sao Paulo, Brazil. Blended bacteria cultures, isolated from the soil samples, were assessed in liquid culture medium enriched with paclobutrazol, to verify its degradative capability. Quantification of growth regulator residues by high performance liquid chromatography was performed 15 days after application of the compound, and showed that the paclobutrazol was slowly degraded and presented a half life of 95 days.