Title:	Efficiency of a new Waitea circinata extract against rice pathogens.
Authors:	CARVALHO, J. C. B. de CHAIBUB, A. A. SOUSA, K. C. I. BRITO, D. C. de FILIPPI, M. C. C. de ARAÚJO, L. G. de
Affiliation:	JACQUELINE CAMPOS BORBA DE CARVALHO, UNIVERSIDADE FEDERAL DE GOIÁS; AMANDA ABDALLAH CHAIBUB, UNIVERSIDADE FEDERAL DE GOIÁS; KELLEN CRISTHINA INÁCIO SOUSA, UNIVERSIDADE FEDERAL DE GOIÁS; DENISE CANDINI DE BRITO, UNIVERSIDADE FEDERAL DE GOIÁS; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; LEILA GARCES DE ARAUJO, UNIVERSIDADE FEDERAL DE GOIÁS.
Date Issued:	2021
Citation:	Pesquisa Agropecuária Tropical, v. 51, e66916, 2021.
Description:	Waitea circinata (Warcup & Talbot) is an orchid antagonist mycorrhizal fungus with biocontrol potential against rice pathogens. This study aimed to optimize the extraction method, obtain a new extract and evaluate its efficiency against rice pathogens in vitro and in vivo, as well as to compare it with other extraction methods and W. circinata. The extracts were obtained and screened for in vitro growth inhibition against the pathogens Cochliobolus miyabeanus, Monographella albescens and Sarocladium oryzae, using the following extracts: mycelial, crude, lyophilized and mycelial mass. An additional in vitro assay was performed with the principal rice pathogen (Magnaporthe oryzae), in order to evaluate the conidial germination and appressorium formation. Based on this evaluation, the lyophilized and mycelial mass extracts were tested in vivo against rice blast (M. oryzae) and compared to the W. circinata mycelial suspension, in different application forms (simultaneous and previous). The mycelial mass extract inhibited all the pathogens, and the crude and lyophilized extracts inhibited C. miyabeanus and M. albescens, respectively. The mycelial mass extract inhibited the M. oryzae conidial germination and appressorium formation by 80 %, and the simultaneous and previous applications suppressed the rice blast by 94 %. These results indicate that the new extract can be used to control rice pathogens.
Thesagro:	Brusone Escaldadura Mancha Parda Podridão Arroz Fungo
NAL Thesaurus:	Fungal brown spot Blast disease Rice
Keywords:	Biocontrole Waitea circinata Biocontrol
ISSN:	1983-4063
DOI:	https://doi.org/10.1590/1983-40632021v5166916
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPAF)