摘要:
Development of integrated weed management systems requires the integration of different weed control methods: chemical, mechanical, cultural, genetic, and biological. Mathematical models provide an adequate tool for attaining this objective. An explanatory economic model was built to analyze the ecophysiological aspects of wild oats (Avena fatua L.) and barley (Hordeum vulgare L.) competitive ability, and to determine the impact of cultural and genetic control on chemical control of wild oats in irrigated barley. The competitive ability of both species was highly dependent on light interception during early growth rather than photosynthesis. Integration of genetic, cultural, and chemical control, accomplished by simulation, showed a good possibility for reducing herbicide use by using more competitive barley cultivars and planting them at higher seeding rates.