What is the best-target for control of black vine weevil larvae?

What is the best-target for control of black vine weevil larvae?

• A. Soil drench applications.
• B. Apply insecticides to foliage.
• C. Use pheromone traps.
• D. Prune damaged roots.

Answer: (A)

Black vine weevil larvae live in the soil and feed on roots, so the most effective way to reduce them is to deliver control directly into the root zone. A soil drench places insecticide where the larvae are feeding, allowing direct exposure and better suppression of the larval population. Sprays aimed at foliage mainly affect insects on leaves and don’t reach underground larvae, so they don’t effectively control the larval stage. Pheromone traps attract adults and help with monitoring, but they don’t reduce the number of larvae in the soil. Pruning damaged roots removes some affected tissue but doesn’t reach or kill larvae hidden in the remaining roots, and it can stress the plant further. Soil drenches target the larval stage where it matters, making them the best choice for controlling black vine weevil larvae.

Black vine weevil larvae live in the soil and feed on roots, so the most effective way to reduce them is to deliver control directly into the root zone. A soil drench places insecticide where the larvae are feeding, allowing direct exposure and better suppression of the larval population.

Sprays aimed at foliage mainly affect insects on leaves and don’t reach underground larvae, so they don’t effectively control the larval stage. Pheromone traps attract adults and help with monitoring, but they don’t reduce the number of larvae in the soil. Pruning damaged roots removes some affected tissue but doesn’t reach or kill larvae hidden in the remaining roots, and it can stress the plant further.

Soil drenches target the larval stage where it matters, making them the best choice for controlling black vine weevil larvae.