A good understanding of the growing requirements of plants and selecting the right species for the conditions of the site can help prevent problems with abiotic stresses. Unfortunately, weather extremes cannot be controlled and are common. 

To diagnose abiotic disease problems, it is important to evaluate the characteristics of the site, past weather conditions, and the care practices of the owner. In some cases, more than one abiotic factor may contribute to the poor health of a plant.

At the completion of the course the students will be able to:

Learn about different abiotic factors.

How abiotic factors affect the plants.

Learn about different common disorders produced due to abiotic factors.  

Books:

  1. Agrios. G.N. 2005. Plant Pathology. 5th Ed. Academic Press N.Y. USA.
  2. Bergstron, L. and H. Kirchmann. 1998. Carbon and nutrient dynamics in natural and agricultural tropical ecosystem. CAB Inc. UK.
  3. Haard, N.F. and D.K. Salunkle. 1980. Symptoms on post-harvest biology and handling of fruits and vegetables. The AUI Publishing Co. Inc. West Post Connecticent, USA.
  4. Hill, M.K. 2004. Understanding Environmental Pollution, 2nd Ed., Cambridge Press, UK.
  5. Shurtleff, M.C. and C.W. Averre. 1997. The Plant Disease Clinic and Field Diagnosis of Abiotic Diseases. American Phytopathological Society Press, St. Paul, Minnesota, USA.
  6. Tandov, H.L.S and R.N. Roy. 2004. Integrated Nutrient Management. A Glossary of Terms. FAO, UN, Rome.

COURSE SCHEDULE

Week

Topics and Readings

Books with Page No.

1

General Introduction of abiotic factors

Agrios, 2005

358

2

General Characteristics; Diagnosis; Control

Temperature effects

Agrios, 2005

358

3

High-Temperature Effects

Low-Temperature Effects

Agrios, 2005

360-364

4

Low-Temperature Effects on Indoor Plants

Mechanisms of Low- and High-Temperature

Injury to Plants.

Agrios, 2005.

364

5

Moisture effects; Low Soil Moisture Effects

Low Relative Humidity Effects

Agrios, 2005.

365

6

High Soil Moisture Effects

Inadequate oxygen

Agrios, 2005

365-367

7

Effects of light

Air pollution

Agrios, 2005

368

8

Air Pollutants and Kinds of Injury to Plants

 

Water and Plant Disease

10-240

9

Main Sources of Air Pollutants

Agrios, 2005

363-371

10

How Air Pollutants Affect Plants

Acid Rain

Agrios, 2005

371

11

Nutritional deficiencies in plants

Soil minerals toxic to plants, soil pH, soil structure

Agrios, 2005

372

12

Detail of nutritional deficiencies in plants

Herbicide Injury

Agrios, 2005

373-380

13

Hail Injury; Lightening

Agrios, 2005

378-380

14

Other improper agricultural practices

Agrios, 2005

381

15

The often confused etiology of stress diseases.

Agrios, 2005

383

16

The often confused etiology of stress diseases.

Agrios, 2005

383

Course Material