Effect of O3, I2 and CL2 to Colletotrichum gloeosporioides Penz, Fusarium oxysporum Schlecht, Lasiodiplodia theobromae Pat. and Pestalotiopsis mangiferae P. Heen. control.
Barbosa, M. C.; Ponce de Leon, G. L.; Sepulveda, S. J.; Guillen, G. E.; Nieto, A. D.;
Acta Horticulturae Year: 2000 Issue: No. 509 Pages: 737-744 Ref: 25 ref.
2000
บทคัดย่อ
Postharvest fungal diseases, is one of the main causes for extensive losses of mango fruit. The food industry has for several years used chlorine application for disease suppression due to its oxidizing properties, yet this practice is (questionably) diminishing as reports continue to confirm the presence of trihalomethane residues and of other carcinogenic by-products. The aim of the research detailed in this paper was to compare the germicide effects of ozone, iodine and chlorine in water, in terms of spore viability, using four species of fungi associated to mango diseases Colletotrichum gloeosporioides [Glomerella cingulata], Pestalotiopsis mangiferae, Fusarium oxysporum and Lasiodiplodia theobromae. Chlorine and iodine proved to be effective germicides against F. oxysporum, eliminating 100% of the spores, and a concentrated solution at 0.005% of both chlorine and iodine was also most effective against L. theobromae. Chlorine was most successful against P. mangiferae. Ozone applied to this f
ungi (2.2 mg/l, 15 minute contact) stalled germination. Based on our findings, we conclude that ozone could be an effective non-residue alternative in suppressing spores of C. gloeosporioides, F. oxysporum and P. mangiferae, particularly when used in washwater and during the hydro-freezing process at packinghouse facilities.