Extrato aquoso de Rumex crispus no controle do oídio em pepineiro

Abstract

Or powdery mildew (Odium spp.) Is one of the principal doenças foliares das cucurbitáceas, being more limiting in the locality of predominam condições of high temperature and baixa umidade during the growing season. Among the alternatives potentiates for or control of doenças em plants estão derivatives obtained from medicinal plants. No entanto, informações on or potential use of spontaneous plants does not control alternative oídio ainda são escassos. This work has an objective to validate or potential crude extraneous water of Rumex crispus (azeda-crespa) for alternative control of plants and plants of pepineiro, as well as for the induction of enzymes related to defesa. Firstly, it was evaluated to antifungal activity on germination of spores, nas concentrações of 0, 1, 5, 10 and 15% do extrato. Essas concentrações do extrato também foram avaliadas sobre a severidade do oídio in pepineiro plants and plântulas. For the evaluation of the mechanisms related to defesa foram performed biochemical analyzes of peroxidase, polyphenoloxidase, phenylalanine amonia-lyase and totais proteins. Nesse case, além to endorse the different concentrations, was conducted bioensaio no qual foram avaliados os periods of 0, 24, 48, 72 e 96 h após a aplicação dos tratamentos. The tests are conducted in an intemally randomized manner with four repetitions for the evaluation of antifungal activity and five repetitions for annalysis of plant and plant protection. Or extrapt apresentou atividade antifúngica inibindo to germinação two spores, as or increase of concentrações do extrato. There was also a 73.3 and 23.0% reduction in the severity of the plants in the peppers, respectively. There was also a linear increase in the number of peroxidases, and phenylalanine ammonia-lyase. These results indicate the potential for extra protection of pepineiro ao powdery mildew plants.