Studies of management techniques for weedy rice (Oryza sativa L.) based on seedling emergence in Yamaguchi prefecture

Key Points

• Assess the effectiveness of autumn non-tillage and herbicide treatments against weedy rice in Yamaguchi prefecture.
• Tested seedling emergence rates of weedy rice in non-tillage and herbicide treatment scenarios.
• Compared winter survival conditions of weedy rice seeds on the soil surface versus buried in the soil.
• Evaluated different herbicide application timings in relation to rice transplanting.
• Seedling emergence was generally higher when weedy rice seeds overwintered on the soil surface.
• Autumn non-tillage was not conclusively effective for weedy rice management in this region.
• Shortening the interval between herbicide applications is essential to reduce weedy rice emergence.