Species parasitized by parasites must face the situation that their own energy is robbed, and iron worms want to take nutrients from the mantis, similar to roundworms snatching energy from the human body, which may cause malnutrition of praying mantis and other conditions, and reflect a special ability that is to control the behavior of praying mantises, I don't know in what way, probably related to the secretion of something that can affect the muscles or nervous system of praying mantises.
Adults are able to control the behavior of praying mantises, and eventually bring mantis and others into contact with ponds, which gives nematodes the opportunity to lay eggs, they will crawl out of the mantis's excretion hole, discharge the eggs into the water, and then their mission is completed, and the eggs are in the water waiting for the next part of the infection process.
This is also why the nematode will run out of the insect's excretion port after putting insects such as praying mantis into the water, probably because the stomata used for breathing in the insect's abdomen are infected by water, and the nematode can feel this change in the environment and know that it is time to come out to ovulate, so it crawls out.