Loading...
Please wait, while we are loading the content...
Similar Documents
Controle alternativo de podridão parda em pêssegos na pós-colheita
| Content Provider | Semantic Scholar |
|---|---|
| Author | Nascimento, Fernanda Varela |
| Copyright Year | 2013 |
| Abstract | Peaches are delicate fruits and when not properly handled constitute a rich medium for the proliferation and development of microorganisms. Brown rot, caused by the fungus Monilinia fructicola (Wint) Honey is the main stone fruit disease in Brazil. Treatment with synthetic fungicides is the most widely used method, however, its use may well select resistant strains of the pathogen and possibly result in the presence of chemical residues on fruits. Intending the development of alternative measures to control brown rot in peaches, the present work was conducted on evaluations on the effectiveness of treatments with UV-C, sodium metasilicate (SM), calcium oxychloride (CO) and Bacillus subtilis (BS). Trials were performed in vitro as well as in vivo tests. The in vitro tests indicated that the germination of conidia of two isolates treated with UV-C, SM and CO was below 4% while in the control treatment conidia germination was above 94%. With regards to the number of colony forming units results were alike the ones of the conidia germination test. Under controlled conditions, all tested doses UV-C reduced the incidence of brown rot in ‘Chiripá’ and ‘Eragil’ peaches to at least 38%. In the same condition, the highest concentrations of SM (1%) and BS (2.5%) controlled brown rot above 80% in peaches of the cultivar Eragil. In the test conducted in 2012 at a commercial fruit selection line better control was achieved by the dose of 0.1153 kJ.m -2 UV-C (83.3%) followed by treatment with 0.8% SM in which decay control reached 70.9%. There was no change in fruit quality parameters due to treatment applications. In the second year of trials the treatment with 1% MS resulted in 89.42% decay control. The decay control outcome of the other treatments was not reasonable. Because variations in the treatments with UVC and SM among trials, it is suggested that further studies on the adaptation of its use in commercial operations. 1 Master of Science dissertation in Agronomy, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. (58p.) March, 2013. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.lume.ufrgs.br/bitstream/handle/10183/77664/000895667.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
