The delta endotoxins are released, by which of the following organism that is most effectively used as biological control?

Polyhedrosis virus

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Bacillus thuringiensis

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Both of the above

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None of the above

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Solution

The correct option is B Bacillus thuringiensis
Delta endotoxins are pore-forming toxins produced by Bacillus thuringiensis species of bacteria. They are useful for their insecticidal action.
During spore formation the bacteria produce crystals of this protein. When an insect ingests these proteins, they are activated by proteolytic cleavage.

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