Category : 12th Class
The spore-forming bacteria have been particularly useful in controlling certain pests. Bacillus popilliae is used for the control of Japanese beetle. The bacterium Bacillus thuringenesis produces protein toxins. One of these, thurioside, is active against different groups of insects. Sporeine was the first bioinsecticide developed on commercial scale in Germany. Sporeine kills insects by inhibiting ion transport in the midgut. Genes for some of these toxins have been isolated and transferred to host through recombinant DNA technology (transgenic plants). Transgenic plants of tomato showing resistance to horn worm larvae have been obtained.
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