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Which of the following is not used as a biopesticide?
A
$Xanthomonas\ campestris$
B
$Bacillus\ thuringiensis$
C
$Trichoderma\ harzianum$
D
Nuclear Polyhedrosis Virus (NPV)
Detailed Solution
Biopesticides are biological agents used to control weeds, insects and pathogens.
$Bacillus\ thuringiensis$ produces the Bt toxin, which kills insect larvae (caterpillars); it is used as a bioinsecticide.
$Trichoderma$ species are free-living fungi that are effective biocontrol agents of several plant pathogens.
Nucleopolyhedrovirus (NPV), a baculovirus, is a species-specific, narrow-spectrum insecticide.
$Xanthomonas\ campestris$ is itself a plant pathogen, causing black rot of crucifers; it is not a biopesticide.
Hence $Xanthomonas\ campestris$ is not used as a biopesticide.
$Bacillus\ thuringiensis$ produces the Bt toxin, which kills insect larvae (caterpillars); it is used as a bioinsecticide.
$Trichoderma$ species are free-living fungi that are effective biocontrol agents of several plant pathogens.
Nucleopolyhedrovirus (NPV), a baculovirus, is a species-specific, narrow-spectrum insecticide.
$Xanthomonas\ campestris$ is itself a plant pathogen, causing black rot of crucifers; it is not a biopesticide.
Hence $Xanthomonas\ campestris$ is not used as a biopesticide.