Which product contains oryzalin as its sole active ingredient and is labeled for tall fescue and warm-season grasses only?

• A. Surflan
• B. XL
• C. Ronstar
• D. Tupersan

Answer: (A)

Oryzalin is a preemergent herbicide, and this question is asking for a product that uses only that chemical as its active ingredient and is labeled specifically for tall fescue and warm-season grasses. Surflan fits this precisely: its sole active ingredient is oryzalin, and its labeling limits its use to tall fescue and warm-season grasses. The other products either rely on different active ingredients or use a mixture of actives, and their labels cover broader or different sets of grasses, so they don’t meet both conditions at once.