Controle alternativo da ferrugem-branca da r?cula pelo extrato aquoso de plantas medicinais

Medicinal plants have in their composition secondary metabolites that may be an important option for alternative control of plant diseases in agroecological farming. However, for the control of some diseases there is little information. An example is the white-rust caused by the rocket Albugo candida. Thus, this study aimed to evaluate the potential of aqueous crude extract (EB) of different medicinal plants in controlling the disease. The EB was used at a concentration of 10% on the germination of sporangia and severity of the disease in the field arugula seedlings. The tests were conducted in a completely randomized design with 12 treatments, four replicates with four plants per repetition. All extracts inhibited the release of zoospores from sporangia in bioassay and extracts that have higher efficiency were dandelion, ruby and rosemary, however the field there was no efficient extract in controlling the disease.Plantas medicinais possuem em sua composi??o metab?litos secund?rios que podem representar importante alternativa no controle alternativo de doen?as de plantas em cultivos agroecol?gicos. No entanto, para o controle de algumas doen?as s?o escassas as informa??es. Um exemplo ? a ferrugem-branca da r?cula causada por Albugo candida. Assim esse trabalho teve por objetivo avaliar o potencial do extrato bruto aquoso (EB) de diferentes plantas medicinais no controle da doen?a. O EB foi utilizado na concentra??o de 10% sobre a germina??o de espor?ngios e na severidade da doen?a em pl?ntulas de r?cula a campo. Os ensaios foram conduzidos em delineamento inteiramente casualizado com 12 tratamentos, quatro repeti??es com quatro plantas por repeti??o . Todos os extratos inibiram a libera??o de zo?sporos de espor?ngios em bioensaio e os extratos que tiveram maior efici?ncia foram dente-de-le?o, rubim e alecrim, porem a campo n?o houve extrato eficiente no controle da doen?a