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Key Event: 2462
Key Event Title
Yield loss in rice paddy ecosystems
Short name
Biological Context
| Level of Biological Organization |
|---|
| Population |
Event Components
Key Event Overview
AOPs Including This Key Event
| AOP Name | Role of event in AOP | Point of Contact | Author Status | OECD Status |
|---|---|---|---|---|
| PSII inhibition by atrazine leading to rice yield loss | AdverseOutcome | SURIYA S (send email) | Under development: Not open for comment. Do not cite |
Taxonomic Applicability
Life Stages
Sex Applicability
Key Event Description
A reduction in the total harvested biomass of marketable rice grains per unit area (e.g., tons per hectare) due to the cumulative effects of reduced photosynthesis and grain filling.
How It Is Measured or Detected
Measured by harvesting a defined area at maturity, threshing, and weighing the grains to calculate yield per hectare.
Domain of Applicability
Taxonomic Applicability: Oryza sativa (rice). Life Stage: Harvest / Maturity. Sex: Not applicable.
Regulatory Significance of the Adverse Outcome
Yield loss corresponds to a direct impact on agricultural productivity and food security. It is highly relevant for EFSA/OECD risk assessments for crop protection and setting safe limits for herbicide application in paddy fields.
References
1. Kumar, S., et al. (2018). Impact of herbicides on photosynthetic efficiency and yield of rice (Oryza sativa L.). Pesticide Biochemistry and Physiology, 148, 22-29.