Let's face it, who is ultimately responsible for the proliferation of these destructive insects?

说实在的这些破坏性昆虫的大量繁殖最终应该由谁来承担责任呢？

These destructive insects are often so greedy that they seriously weaken the plant if not kill it outright.

这些破坏性昆虫经常十分贪婪会严重弱化这些植物甚至直接杀死它们。

It has happened also because destructive insects often undergo a flare-back, or resurgence, after spraying, in numbers greater than before.

这也是因为喷洒化学品后，具有破坏性的昆虫经常进行“反击”或者复活，数量变得比以前更多。