Effect of time and temperature of storage on the activity of the etanolic extracts of Lantana camara L. and Heliotropium indicum L. on Colletotrichum gloeosporioides

Acta Agronómica

Rodriguez, Dorian Alcides²  Ulacio, Dilcia²  Sanabria, Maria Elena²  Valera, Rosario Emperatriz²  Infante, Rafael Alejandro¹ 

[1] Fundación Azucarera para el Desarrollo, la Productividad y la Investigación, Fundacaña, Chivacoa, Venezuela;Universidad Centroccidental Lisandro Alvarado, Barquisimeto, Venezuela

关键词: Natural extracts;    secondary metabolites;    biological control;    anthracnose;    stabilityIntroducción Los extractos etanólicos de muchas plantas silvestres tienen un marcado efecto fungitóxico sobre diversos patosistemas (García y Pérez;    2009);   

DOI  :  10.15446/acag.v64n4.47608

学科分类：农业科学（综合）

来源: Universidad Nacional de Colombia * Facultad de Ciencias Agropecuarias Palmira

【 摘 要 】

The effect of time and temperature of storage of ethanolic extracts (EE) of Lantana camara and Heliotropium indicum on Colletotrichum gloeosporioides was investigated. The EE were stored at 8±2 and 26±2°C, during one year. Every 2 months they were diluted in potato dextrose agar (PDA) at 0; 0.5; 1 y 1.5% (v/v) concentrations, fungus disks were placed onto the media, mycelial growth (ICM) and sporulation (IE) inhibition were measured, as well as conidia germination. The EE stored at 8±2°C maintained their effectiveness on all variables during the 12 months storage, while those stored at 26±2°C started to lose their effectiveness at 6 to 8 months, ending up to 3% ICM, 4% IE and 18% conidia germination at 1.5% concentration. Results indicated that storage temperature and time are determinant for extracts effectiveness.

【 授权许可】

Unknown