Controle da pinta preta do tomateiro pelo extrato de cúrcuma: um estudo de caso sobre a sustentabilidade

Abstract

Plant extracts have shown potential for alternative control of plant diseases. However there are few informations about its viability. The aim of this work was to do a case study of the control of tomato early blight by turmeric (Curcuma longa) rhizomes extract (TE) and discuss aspects concern to sustainability. The study was based on experimental data that demonstrated the potential use of TE similar than chemicals pesticides. The cost of turmeric  100
cultivation and TE preparation was analyzed. Results were confronted with commercial products and in tomato farming systems. Six m2  of turmeric cultivation are sufficient to six
TE applications in 1000 m2  of tomato growth. The TE total cost was R$ 65.10 for 1000 m2  of tomato cultivation. From  this cost more than 70% is labor which made its cost higher  that some  commercial products. But, the alternative use of  the TE must contribute to obtain differentiated vegetal  product, without pesticide residues, allowing an increase in  its economic value. Thus, the TE obtaining requires more labor but can contribute as an alternative system for  sustainability of familar agriculture and the to environment.