They are only found on pasture, as they do not survive well on stable bedding. The pupae are known to be sensitive to frost, moisture and flooding, so the environmental conditions present play a significant role in the success of the parasite. | They are only found on pasture, as they do not survive well on stable bedding. The pupae are known to be sensitive to frost, moisture and flooding, so the environmental conditions present play a significant role in the success of the parasite. |