Kansas Turf Pest Control 3B Practice Test 2026 - Free Pest Control Certification Practice Questions and Study Guide

Solitaire is a brand of diquat-based herbicide that acts as a contact killer. It hits the weed tissue on contact and causes rapid scorch, giving quick initial knockdown. But it has little to no soil activity, so it doesn’t provide lasting or residual control. As a result, weeds can regrow or new weeds can emerge after the first treatment, making repeat applications necessary to achieve ongoing control. This combination—fast visible kill with no residual effect—is exactly what this question is testing.