Biopesticides are substances used to control pests that are derived from natural sources rather than synthetic chemicals.
Biopesticides used in crops are broadly categorized into three types: microbial, biochemical, and plant-incorporated protectants. Microbial biopesticides utilize living microorganisms like bacteria, fungi, or viruses to control pests. Biochemical biopesticides are natural substances derived from plants, animals, or minerals that disrupt pest behavior or kill them. Plant-incorporated protectants involve genetically modifying plants to express pesticidal genes.
Fungi :
Beauveria bassiana and Metarhizium anisopliae are examples of fungal biopesticides that infect and kill insects.
Bacteria :
Bacillus thuringiensis is a widely used bacterial biopesticide that produces toxins that are lethal to certain insects.
Viruses :
Baculoviruses are viral biopesticides that infect and kill caterpillars and some flies.
Biochemical Biopesticides :
Neem oil :
Derived from the Azadirachta indica tree, neem oil is a natural insecticide that disrupts insect development and feeding.
Pheromones :
Synthetic pheromones are used to disrupt insect mating by attracting pests to traps or interfering with their ability to find mates.
Botanicals :
Extracts from plants like pyrethrum, nicotine, and rotenone can be used as natural insecticides.
Plant-Incorporated Protectants (PIPs) :
Bt crops : Crops genetically modified to express Bt toxins from Bacillus thuringiensis are examples of PIPs, providing resistance to certain insects.
Plant-Incorporated Protectants (PIPs) :
Bt crops :
Crops genetically modified to express Bt toxins from Bacillus thuringiensis are examples of PIPs, providing resistance to certain insects.
Benefits of Biopesticides :
Biopesticides offer a more sustainable alternative to synthetic pesticides, reducing environmental impact and promoting healthier ecosystems.
Environmental benefits :
Biopesticides are generally more environmentally friendly than synthetic pesticides, with fewer negative impacts on non-target organisms.
Host-specificity :
Many biopesticides are specific to target organisms, reducing the risk of harming beneficial insects or other wildlife.
Reduced reliance on synthetic pesticides :
Biopesticides can help reduce the need for synthetic pesticides, which can have long-lasting environmental effects.
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