Types of Biological control

1. Inundation: It involves the use of large numbers of organisms over a short time to suppress or destroy a population.
2. Augmentation: it is being the supplement to an existing natural population, that has a power to control a pest or disease.

Approaches used for biological control of pests and diseases

1. Direct: Introduction of antagonists able to suppress the activity of insect and pathogen.
2. Indirect: Manipulation of the microbial balance by means of crop practices, cultural measures, soil supplements etc.
3. Host-mediated: Induction of localized and systemic resistance, virus cross protection.

Bio-pesticides

• Bio-pesticides are certain types of pesticides derived from such natural materials as animals, plants, bacteria and certain minerals.
• Bio-pesticides fall into 5 major classes

1. Microbial pesticides
2. Plant-incorporated-protectants (PIPs)
3. Biochemical pesticides
4. Botanical pesticides
5. Biotic agents (parasitoids and predators)

• Thus, microbial pesticides or botanical pesticides or biotic agents either alone or in combination are known as bio-pesticides.