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Pesticides Research No. 116 2008 of fungicide application in winter wheat

Contents

Preface

Summary

Sammenfatning

1 Introduction

• 1.1 Fungicide use in winter wheat
• 1.2 Spatial variation in diseases
• 1.3 Spatially varying fungicide application
• 1.4 Objectives

2 Materials and methods

• 2.1 Field experiments
• 2.2 Measurements of soil and topography
• 2.3 Yield measurements
• 2.4 Disease assessments
• 2.5 Sensor measurements of plants
• 2.6 Fungicide deposition on leaves and soil
• 2.7 Overview of measurement dates
• 2.8 Experiment with fungicide deposition at different driving speed
• 2.9 Statistical analyses

3 Results

• 3.1 Characterisation of the sites
• 3.2 Yields
• 3.3 Diseases
• 3.4 Sensor measurements of crop parameters
  • 3.4.1 Manual measurements
  • 3.4.2 MobilLas measurements
• 3.5 Fungicide deposition
  3.5.1 Leaf size
  • 3.5.2 Leaf deposition
  • 3.5.3 Soil deposition
• 3.6 Fungicide deposition at different driving speed

4 Model development

• 4.1 Regression model
• 4.2 Causal model
  • 4.2.1 Yield responses
  • 4.2.2 Disease responses
  • 4.2.3 Fungicide deposition
  • 4.2.4 Parameterisation of the causal model
• 4.3 Yield and economic benefits of applying the models
• 4.4 Spatial variation in soil and plant properties
• 4.5 Quality of sensor measurements
• 4.6 Fungicide treatment effects
  • 4.6.1 Disease and yield responses
  • 4.6.2 Fungicide deposition
• 4.7 Models for estimating yield response to fungicide
• 4.8 Evaluation of estimated spatial variation in fungicide rate

5 Conclusions

6 Perspectives

• 6.1 Application of sensor-based algorithms
• 6.2 Research issues

References

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Version 1.0 January 2008, © Danish Environmental Protection Agency