Potential of Exserohilum rostratum as a bioherbicide for controlling goosegrass (Eleusine indica (L.) gaertn.)

Prameswari, Gopal (2007) Potential of Exserohilum rostratum as a bioherbicide for controlling goosegrass (Eleusine indica (L.) gaertn.). [Project Paper] (Submitted)

Text lp FSPM 2007 47.pdf Download (6MB)

Abstract

Exserohilum rostratum (Drecshler) is a fungal pathogen, which was identified by Leonard and Suggs as a leaf blight causing agent in Echinochloa spp. Exserohilum rostratum was studied for its potential to suppress the growth of goosegrass (Eleusine indica). When applied as a postemergence foliar spray at one to four leaf stage, with a 24 hour dew period, E. rostratum caused 100% weed mortality in Eleusine indica at all four leaf stages tested. Exserohilum rostratum does not show any pathogenic activity on economically important crop species tested includeing rice varieties MR219, MR220, ligo corn and sweet corn, as indicated by leaf severity index. The level of disease severity on goose grass was directly proportional to the conidial concentration of Exserohilum rostratum. Concentrations at 106 conidia/ml provided excellent control of Eleusine indica. At initial infection, Eleusine indica showed blight like reaction one day after inoculation followed by rapid necrosis of affected tissue. The symptoms showed by Exserohilum rostratuin indicated that phytotoxins may be operative in pathogenesis. From the results of this study, proven that Exserohilum rostratum has potential as a bioherbicide to control goosegrass.

Item Type:	Project Paper
Faculty:	Faculty of Agriculture and Food Sciences
Depositing User:	Mr. Azman Mohamad
Date Deposited:	17 Dec 2024 07:06
Last Modified:	17 Dec 2024 07:06
URI:	http://psaspb.upm.edu.my/id/eprint/2298

Actions (login required)

View Item