EFFECT OF ESSENTIAL OILS AND VEGETABLE EXTRACTS IN THE POSTHARVEST CONTROL OF PATHOGENS ON TAPEINOCHILUS ANANASSAE

D.C.M. Furtado, E.P.R. Amorim, A.L.B. Galvão, L.P. Rezende
Tropical flowers are widely grown in Brazil. Among the problems related to the cultivation of these plants, phytopathogens usually stand out because they cause losses in the production and postharvest. The present work had the aim of identifying the inflorescence spot disease pathogens in Tapeinochilus ananassae, and evaluating their in vitro and in vivo control using essential oils and vegetable extracts in the postharvest. Fusarium semitectum, Colletotrichum gloeosporioides, Curvularia eragrostidis and C. lunata were identified as causal agents of T. ananassae inflorescences spot disease. An in vitro test was done to select the best control treatment: 5, 10, 15 and 20% of three vegetal extracts (garlic, onion and Serjania lethalis); 0.25, 0.5, 0.75 and 1% of a commercial product (Ecolife®) and 1.25, 2.5, 3.75 and 5% of two essentials oils (citronella and Eucalyptus citriodora). The in vivo test to spot disease control was done making pulverizations on the inflorescences 21 and 3 days before the harvest, with garlic (5%), Ecolife® (1%), Citronella and Eucalyptus citriodora (1.25%). After the harvest, the inflorescences were inoculated with the pathogens and kept on a wet chamber for 48 h, in a maintenance solution (water and calcium sulfate 50 mM), before evaluation. In the in vivo control, all of the extracts and oils tested decrease significantly the disease incidence, except for F. semitectum, however, the inflorescences treated with oils showed phytotoxicity by the eighth day after the pulverization. Nevertheless, in the in vivo control with 0.25% oil concentration, there was no phytotoxicity and in spite of showing incidence decrease, only C. gloeosporioides, demonstrated significant difference to 5% of probability.
Furtado, D.C.M., Amorim, E.P.R., Galvão, A.L.B. and Rezende, L.P. (2015). EFFECT OF ESSENTIAL OILS AND VEGETABLE EXTRACTS IN THE POSTHARVEST CONTROL OF PATHOGENS ON TAPEINOCHILUS ANANASSAE. Acta Hortic. 1060, 295-300
DOI: 10.17660/ActaHortic.2015.1060.44
https://doi.org/10.17660/ActaHortic.2015.1060.44
flower of quality, alternative control, alternative products, natural substances, fungi
English

Acta Horticulturae