They influence a pancor. But usually NOT with the first shot of their acid spores. They need multiple shots since the volume of the cloud never exceeds the life of my pancor with 1 shot of their special ability.
But in the posted battle a single shot of acid spores creates a so large cloud of spores that my pancor is influenced with only 1 shot. Usually they need at least 5 or 6 Shots until the cloud of spores becomes large enough to influence the attack speed of the pancor.