Which of the following is a grazing-based parasite control method?

Which of the following is a grazing-based parasite control method?

• A. Pasture rotation
• B. Vaccination
• C. Antibiotics
• D. Deworming pills

Answer: (A)

Grazing management uses how and when animals eat to cut down on parasite exposure. Moving stock to fresh paddocks and letting previously grazed areas rest reduces the intake of infective larvae that survive on pasture. With time off, larvae on the grass die off or become unavailable to the next group of animals, breaking the cycle of infection. Pasture rotation is the best example because it directly targets the environment where parasites live and are picked up, rather than relying on drugs or vaccines. The other options are medical or preventive tools: vaccination builds immunity but doesn’t reduce exposure on the pasture; antibiotics and deworming pills treat parasites inside the animal and don’t address environmental contamination.

Grazing management uses how and when animals eat to cut down on parasite exposure. Moving stock to fresh paddocks and letting previously grazed areas rest reduces the intake of infective larvae that survive on pasture. With time off, larvae on the grass die off or become unavailable to the next group of animals, breaking the cycle of infection.

Pasture rotation is the best example because it directly targets the environment where parasites live and are picked up, rather than relying on drugs or vaccines. The other options are medical or preventive tools: vaccination builds immunity but doesn’t reduce exposure on the pasture; antibiotics and deworming pills treat parasites inside the animal and don’t address environmental contamination.