what are biopesticides????

Biopesticides are those biological  agents that are used  for control of weeds, insects and pathogens. 

There are three types of biopesticides- microbial pesticides (such as bacteria, viruses, fungi, etc), biochemical pesticides (such as insect sex pheromones) and plant incorporated protectants (such as GM crops).

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Biopesticides, a contraction of 'biological pesticides', include several types of pest management intervention: through predatory, parasitic, or chemical relationships. The term has been associated historically with biological control - and by implication - the manipulation of living organisms.Biochemical pesticides are naturally occurring substances that control pests.

ADVANTAGES:
Harmful residues not detected.
Can be cheaper than chemical pesticides when locally produced.
Can be more effective than chemical pesticides in the long-term (as demonstrated, for example, by the LUBILOSA Programme).
DISADVANTAGES:
High specificity: which may require an exact identification of the pest/pathogen and the use of multiple products to be used.
Often slow speed of action thus making them unsuitable if a pest outbreak is an immediate threat to a crop.
Often variable efficacy due to the influences of various biotic and abiotic factors.
Living organisms evolve and increase their resistance to biological, chemical, physical or any other form of control. If the target population is not exterminated or rendered incapable of reproduction, the surviving population can acquire a tolerance of whatever pressures are brought to bear, resulting in an evolutionary arms race.

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Biopesticides (also known as biological pesticides) are pesticides derived from such natural materials as animals, plants, bacteria, and certain minerals. For example, canola oil and baking soda have pesticidal applications and are considered biopesticides. 

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