In recent years, the British government took the lead in testing a batch of transgenic winter rape fields, and researchers found that this transgenic crop may change the balance of weed species in the fields. This has led to a sharp decline in the number of insects such as butterflies and bees in the field, and also threatened the survival of many animals.
1999 In May, the authoritative British science magazine Nature published John, an associate professor at Cornell University.
Rossi's paper shocked the world. According to the paper, the researchers spread the pollen of insect-resistant transgenic corn-Bt gene corn on the leaves of chicory, and then let butterfly larvae eat these leaves. Four days later, 44% of the larvae died, and the surviving larvae were small and listless. The other group ate the larvae scattered with ordinary corn pollen leaves, and the mortality rate was not high, and there was no developmental delay.
bio-safety
Based on this, the paper draws the conclusion that BT transgenic corn pollen contains toxins. BT transgenic corn is cultivated because of its ability to resist pests and diseases.
Yes, its cultivation method is to implant a gene into corn seeds, which can effectively kill corn pests. Some scientists believe that the implantation of BT gene can make corn produce substances that kill pests, thus it has the ability to resist pests, but it is also toxic and endangers the safety of other organisms.
In terms of animals, genetically modified organisms have more survival advantages than similar organisms after artificial transformation. Such as salmon implanted with human growth hormone. It is more than three times larger than ordinary salmon and grows faster. Ecological research experts are very worried that genetically modified organisms with survival advantages will eliminate the original species in nature in the evolutionary process of "natural selection, eliminating the weak and retaining the strong"