But now the usefulness of Bt is at stake. Modified toxin genes of different strains have been isolated and spliced into corn, potato, cotton, tomato, rape-seed, apple, tobacco, walnut and aubergine plants. As more and more crops are engineered to be pest-resistant, insects feeding on those plants cannot find a refuge. The constant exposure to Bt toxin either kills all the insects off or leads irreversibly to resistance. Both scenarios are highly undesirable.
Insects are critical to the entire food chain.
Many animals including birds, frogs and hedgehogs live on them. They'll simply seek to engineer and monopolize other defense systems. This kind of behavior seems to imply that plant life and all other life on our planet is merely there to be experimented with. There seems to be an underlying belief that nature can be controlled. The attempt to create superraces of plants at the cost of biodiversity and locally adapted crop varieties puts the globe's food supply at severe risk.