文档介绍：Assessment of yield losses imposed by plant pathogens
Introduction and definitions
Effects of plant pathogens on host physiology
Effects of plant pathogens on yield and ponents
Models for loss assessment
Concluding remarks
Time
Disease intensity
Time
Yield
Loss prediction
Why do we need (want) to assess yield loss? or What are the uses of yield loss records
For identifying the time when control is needed and assisting to develope effective management procedures.
For making decision concerning the need of disease management (cost/effective calculations).
Why do we need (want) to assess yield loss? or What are the uses of yield loss records
For administrative decisions: making priorities in research, breeding, allocation of efforts, etc.
For insurance purposes.
Time
Disease intensity
Time
Yield
Loss assessment
Loss assessments can be made on several scales:
Individual plants
Small plots (., experimental plots)
Individual field
Regions
Nations
The entire world
How plant pathogens affect their hosts ?
Effects on host physiology
Effects on host development
Effects on yield quantity
Effects on yield quality
Leaf infection
Effects on host physiology
Effects on host development
Effects on yield quantity
Effects on yield quality
Stem infection
How plant pathogens affect their hosts ?
Effects of plant pathogens on their hosts
Effects on yield quantity
Effects on yield quality
Fruit rot
Effects on host development
Effects on host physiology
Effects on host physiology
Effects on yield quantity
Effects on yield quality
Fruit ghost spots
Effects on host development
How plant pathogens affect their hosts ?
Effects on host physiology
Effects of plant pathogens on host physiology
Effects of radiation interception (RI)
Effects of radiation use efficiency (RIE)
reflected radiation
intercepted radiation
transmitted radiation