EPWS 310 - Plant Pathology
Lectures - Fall 2002
LECTURE 10 READING – Chapter 9
Control using cultural, biological,
chemical methods
I. Various Control Methods-
A. Regulation- aims at excluding a pathogen form a host or from a
certain geographic area.
1. Quarantine and inspection.- Plant
Quarantine Act of 1912
B. Cultural control methods- aims at helping plants avoid contact with a pathogen
and at eradication or reducing the amount of a pathogen in a field.
1.
2.
3.
4.
5.
6.
C. Biological control- the total or partial destruction of pathogen
populations by other organisms.
1. suppressive soils
2. cross protection
3. hypervirulence
4. mycoparasitism
*The mechanisms by which antagonistic
microorganisms affect pathogen populations:
1. Direct parasitism
2. Competition with the pathogen for food.
3. Direct toxic effects on the pathogen by
antibiotic substances releases by antagonist.
4. Indirect toxic effects on the pathogen by
volatile substances released by antagonists.
D. Trap plants-
E. Antagonistic plants-
F. Chemical methods that eradicate or reduce the inoculum.
1. Soil treatment-
2. Fumigation-.
3. Aerial sprays-
4. Postharvest-