What is a major environmental risk associated with neonicotinoid seed coatings?

What is a major environmental risk associated with neonicotinoid seed coatings?

• A. They do not affect non-target species
• B. They are safe for birds
• C. They can harm pollinators and birds through exposure
• D. They only degrade before reaching the soil

Answer: (C)

The main idea is that neonicotinoid seed coatings create a real environmental risk to non-target animals, especially pollinators and birds, through exposure. These pesticides are systemic, so once seeds are planted the chemical moves throughout the plant and ends up in pollen, nectar, and other plant tissues. Pollinators visiting flowers can ingest residues, while birds may be exposed by eating treated seeds or insects that have absorbed the chemical, leading to lethal or sublethal effects like impaired foraging, navigation, or reproduction. There are also exposure routes from dust during planting and from contaminated water, and the chemicals can persist in soil rather than degrading quickly. The other statements don’t fit because these coatings do affect non-target species, including bees and birds; they are not safe for birds; and they do not degrade before reaching the soil—in fact, residues can persist and be taken up by plants long after planting.

The main idea is that neonicotinoid seed coatings create a real environmental risk to non-target animals, especially pollinators and birds, through exposure. These pesticides are systemic, so once seeds are planted the chemical moves throughout the plant and ends up in pollen, nectar, and other plant tissues. Pollinators visiting flowers can ingest residues, while birds may be exposed by eating treated seeds or insects that have absorbed the chemical, leading to lethal or sublethal effects like impaired foraging, navigation, or reproduction. There are also exposure routes from dust during planting and from contaminated water, and the chemicals can persist in soil rather than degrading quickly.

The other statements don’t fit because these coatings do affect non-target species, including bees and birds; they are not safe for birds; and they do not degrade before reaching the soil—in fact, residues can persist and be taken up by plants long after planting.