You are afraid of all “bugs.” Large or poisonous ones give -3 to self-control rolls. Very large ones, or large numbers, give -6. Avoid hills of giant ants.
Make a HT roll whenever you are in a stressful situation (especially if your life or the life of a friend is threatened). If you have any sort of Phobia, exposure to the object of your fear counts as a stressful situation; roll vs. HT once every 10 minutes. On a failure, you suffer a seizure that lasts 1d minutes and costs you 1d FP. You can do nothing during that time.