The spore sensitivity of the "Flying Ship Black Vine" to specific bands of ultraviolet light means that existing ultraviolet disinfection lamps can exterminate it.
The human society of Blue Star has a sufficient number of ultraviolet sterilization equipment. As long as these spores do not hide in any nook and cranny, they can avoid spreading with these devices.
At least for now, there is a bit of a clue on how to deal with the single troop type of the "Sagali" civilization.
The advantages of a single troop type are obvious: it's easy to mass-produce, the logistical burden is small, and there's no need to care about tactics. As long as they swarm forward, if there's no preparation, they can easily be wiped out in one sweep.
But the disadvantages are equally prominent. Once a weakness is exposed and targeted, no matter how many come, they are just fodder.
