Biological Control of Plant Pathogens
Kamal Krishna Pal*
Visiting Scholar
Department of Plant Pathology
Ohio State University
OARDC
Wooster, OH
*Permanent address:
National Research Centre for Groundnut
Ivnagar Road, PB No. 5
Juangadh-362 001
Gujarat, India
Entire paper at link......
Kamal Krishna Pal*
Visiting Scholar
Department of Plant Pathology
Ohio State University
OARDC
Wooster, OH
*Permanent address:
National Research Centre for Groundnut
Ivnagar Road, PB No. 5
Juangadh-362 001
Gujarat, India
Introduction
Plant diseases need to be controlled to maintain the quality and abundance of food, feed, and fiber produced by growers around the world. Different approaches may be used to prevent, mitigate or control plant diseases. Beyond good agronomic and horticultural practices, growers often rely heavily on chemical fertilizers and pesticides. Such inputs to agriculture have contributed significantly to the spectacular improvements in crop productivity and quality over the past 100 years. However, the environmental pollution caused by excessive use and misuse of agrochemicals, as well as fear-mongering by some opponents of pesticides, has led to considerable changes in people’s attitudes towards the use of pesticides in agriculture. Today, there are strict regulations on chemical pesticide use, and there is political pressure to remove the most hazardous chemicals from the market. Additionally, the spread of plant diseases in natural ecosystems may preclude successful application of chemicals, because of the scale to which such applications might have to be applied. Consequently, some pest management researchers have focused their efforts on developing alternative inputs to synthetic chemicals for controlling pests and diseases. Among these alternatives are those referred to as biological controls.
A variety of biological controls are available for use, but further development and effective adoption will require a greater understanding of the complex interactions among plants, people, and the environment. To that end, this article is presented as an advanced survey of the nature and practice of biological control as it is applied to the suppression of plant diseases. This survey will i) describe the various definitions and key mechanisms of biocontrol, ii) explore the relationships between microbial diversity and biological control, iii) describe the current status of research and application of biological controls, and iv) briefly outline future directions that might lead to the development of more diverse and effective biological controls for plant diseases.
Entire paper at link......