What is the difference between slurry-coated seeds and film-coated seeds?

• A. Slurry coating uses a liquid mix to coat seeds; film coating uses a polymer film for uniform coverage and durability.
• B. Slurry coating uses a polymer film; film coating uses liquid.
• C. Both are identical in technique.
• D. Slurry coating removes the active ingredient.

Answer: (A)

Slurry coating applies a liquid mix to the seeds, using a slurry that contains the active ingredient and other additives; as the liquid dries, a coating remains on the seed. Film coating, on the other hand, builds up a thin, continuous polymer film around the seed, creating a uniform and durable outer layer. This distinction matters because slurry coatings rely on drying of the liquid to form the coat, which can lead to variable thickness if distribution isn’t even, while film coatings form a smooth, consistent layer that enhances handling, durability, and sometimes controlled release of the treatment. The other statements aren’t accurate: slurry coatings don’t remove the active ingredient, and the two methods are not identical—the materials and resulting surface differ markedly, with film coating specifically using a polymer film.