It is theoretically possible to create a bacterium that specifically eliminates a particular crop through bioengineering, but this approach involves serious ethical, legal, and international relations issues. Here are a few key points： ### 1. **Technical feasibility** - **Gene editing technology**: Modern bioengineering technologies, such as CRISPR-Cas9, have been able to precisely edit the genome of bacteria to give it specific functions. -**Target specificity**: In theory, a bacterium can be designed to attack only specific crop varieties or species. This requires an in-depth understanding of the interaction between the genome of the target crop and bacteria. ### 2. **Ethical and legal issues** -**Biological Weapons Convention**: The 1972 Biological Weapons Convention expressly prohibits the development, production, stockpiling and use of biological weapons. Any attempt to destroy the enemy's agriculture through bioengineering will violate international law. -**Humanitarian issues**: Deliberate destruction of agriculture can lead to food shortages, famine and large numbers of civilian deaths, which are regarded as war crimes in international humanitarian law. ### 3. **Ecological risk** -**Uncontrollable ecological consequences**: Even if bacteria that only attack specific crops are designed, there is a risk of mutation or spread, which may cause unforeseen harm to other plants, ecosystems, and human health. - **Threat to biodiversity**: This bacterium may pose a threat to global biodiversity and cause irreversible ecological damage. ### 4. **International relations and security** -**Arms race**: The development of such biological weapons may trigger an arms race, exacerbate international tensions and increase global instability. -**Retaliation and countermeasures**: The enemy country may take retaliatory measures, leading to an escalation of the conflict and even a full-scale war. ### 5. **Alternative** -**Peaceful use of biotechnology**: Bioengineering can be used to increase crop yield, enhance disease resistance and improve nutrition, thereby promoting global food security. These methods of peaceful use are more constructive and sustainable. ### Conclusion Although from a technical point of view, it is possible to create a bacterium that specifically eliminates a particular crop through bioengineering, this approach has serious ethical, legal, ecological and international relations problems. The international community generally opposes the use of biotechnology for military or destructive purposes, and prefers to use it to promote peace and sustainable development. Therefore, the development of such biological weapons is not only unethical, but may also have disastrous consequences.