Good idea. However, you have to make sure that the biocontrol agent that you plan to manipulate will not create new problems. A first step is to make a thorough literature search to determine what is known about the host range of the biocontrol agent. A second step is to make preliminary work in enclosed environments such as greehouses so as this minimize the risks.
Good idea, even so, You can make a thorough field survey and analyze the prospect and feasibility for the biocontrol agent, its host specificity, and its impact on the environment.
Starting in an enclosed environment is highly preferable
Studies on the biology and ecology of biological control agents including host range, as well as their environmental conditions including their enemies such as pathogens/predators, will certainly help in using biological control agents against the invasive plant. Furthermore creating favorable conditions for natural enemies will also contribute to an increase in the population of biological control agents of invasive pests,