Economic analysis of integrated weed management strategies for annual barnyardgrass (Echinochloa crus-galli complex) in Philippine rice farming systems
2017
Beltran, Jesusa C. | Pannell, David J. | Doole, Graeme J. | White, Benedict
This paper describes a dynamic simulation model that has been developed to provide acomprehensive assessment of integrated weed management programmes for the control of annual barnyardgrass(Echinochloa crus-galli complex) in Philippine rice farming systems. The main outputs of the model includeweed seed and plant densities and seasonal and annualised profit over the simulated planning horizon. Modeloutput emphasises the substantial economic benefits associated with effective long-term weed managementstrategies. In addition, a mixture of chemical and non-chemical treatments provides good weed control in ricecrops, and maximises long-term profit for systems where the main weed is annual barnyardgrass. However, theperformance of this strategy is influenced by crop establishment method and weed density level. These resultsillustrate the value of the model for guiding the efficient control of annual barnyardgrass in rice crops in thePhilippines.
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