Fractions and plant extracts in anthracnose control of welsh onion (Allium fistulosum L.)
Ione Medeiros da Silva, Ana Francisca Tibúrcia Amorim Ferreira e Ferreira, Alex-Sandra Farias de Almeida, Jânia Lília da Silva Bentes
Journal Title:Revista Agraria Academica / Agrarian Academic Journal
Anthracnose disease, caused by species of the genus Colletotrichum, is the main disease of welsh onion (Allium fistulosumL.) in Brazil. The pathogen has easy spread and the efficient control is by the use of fungicides. The objective of this workwas to evaluate the crude and fractionated plant extracts of Picrolema sprucei, Piper marginatum and Croton cajucara, in disease control. In in vitro assay were evaluated the mycelial growth index (ICM) and the percentages of sporulation inhibition (PIEI), and in vivowas evaluated the severity and the area under disease progress curve (AUDPC) was also calculated. In both assays, P. spruceiand P. marginatumhad the best results with fungistatic effect and reduced disease severity, suggesting their use in alternative disease control.