Chemical composition and control of Sclerotium rolfsii Sacc by essential oils.

Essential oils of medicinal plants show potential to control phytopathogens. Essential oils of Lippia sidoides Cham, Lippia lasiocalycina Cham, Lippia origanoides Kunth - Teresina, Lippia origanoides Kunth - Jatobá, Mesosphaerum suaveolens (L.) Kuntze, Croton sonderianus Muell. Arg. And Croton zehntneri Pax et Hoffm. were evaluated regarding their chemical composition and in controlling the Sclerotium rolfsii Sacc. The experiments were carried out in a completely randomized design with five concentrations and the control (without oil application): 0.0313; 0.0625; 0.1250; 0.2500 and 0.500 mL kg-1 in Petri dishes with PDA medium (potato-dextrose-agar). The evaluations consisted of daily measurements of the colony diameter in diametrically opposite directions, 24 h after the experiment installation and maintained until the radial reach of the colony on the edges of the Petri dish, in one of the treatments. The chemical composition of the essential oils were evaluated by GC-MS and the following compounds were identified: Thymol (33.5%, L. sidoides); piperitenone oxide (67.7%, L. lasiocalicyna); borneol (19.2%, L. origanoides); borneol carvacrol (34.4%, L. origanoides ? Jatobá); sabiene (30.3%, M. suaveolens); β-sabinene (30.5%, C. sonderianus); and estragole (90,1%, C. zehntneri). The S. rolfsii fungus is highly sensitive to L. sidoides, L. origanoides - Jatobá and C. zehntneri essential oils, suggesting its use in the management of Sclerotium wilt in cowpea.

Bibliographic Details

Main Authors:	SANTOS, A. R. B., LARANJEIRA, D., DIAS, L. R. C., SOUSA, E. da S., MELO, C. D. S. de, LIMA, S. G. de, SILVA, P. H. S. da, ATHAYDE SOBRINHO, C.
Other Authors:	Ananda Rosa Beserra Santos, UFRPE, Recife, PE.; Delson Laranjeira, UFRPE, Recife, PE.; Larisse Raquel Carvalho Dias, UEMA, São Luis, MA.; Edymilais Da Silva Sousa, UFPI, Teresina, PI.; Christian Dário Silva de Melo, UFPI, Teresina, PI; Sidney Gonçalo de Lima, UFPI, Teresina, PI.; PAULO HENRIQUE SOARES DA SILVA, CPAMN; CANDIDO ATHAYDE SOBRINHO, CPAMN.
Format:	Artigo de periódico biblioteca
Language:	Ingles English
Published:	2020-06-23
Subjects:	Atividade antifúngica, Controle alternativo, Murcha de Esclerócio, Vigna Unguiculata, Óleo Essencial, Patógeno, Doença de Planta, Fungo, Antifungal agents, Sclerotium, Fungi,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1123432
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