Final answer:
The statement that larvae of Habronema spp. create summer sores if they enter a wound is true because these larvae can infect wounds and cause granulomatous lesions known as summer sores, particularly in equines.
Step-by-step explanation:
The statement declaring that larvae of Habronema spp. create summer sores if they enter a wound is true. Habronema spp. are a type of parasitic worm, and their larvae can indeed infect wounds, leading to the development of granulomatous lesions, which are commonly referred to as summer sores. These sores can be especially problematic in equines (horses, donkeys, and mules) where the larvae are deposited by flies that have fed on fecal material containing Habronema eggs. The larvae then enter the wound and cause irritation and inflammation, resulting in the painful sores that do not heal easily during the warmer seasons.