Which nematicide application is typically effective when nematodes are present in a field where crops are actively growing?

Which nematicide application is typically effective when nematodes are present in a field where crops are actively growing?

• A. Chemigation of nematicides
• B. Soil fumigation
• C. Seed-soaking
• D. Foliar nutrient spray

Answer: (A)

Delivering nematicide through irrigation targets the root zone where nematodes feed while the crop is actively growing. Chemigation uses irrigation water to move the chemical into the soil and around developing roots, so nematodes in the root zone are exposed as the crop takes up water and nutrients. This method is practical and effective during active growth because it reaches nematodes where they cause damage without disturbing the growing crop above ground, and it allows timing to align with irrigation schedules for efficient application. Soil fumigation, by contrast, is typically done before or around planting when soil can be sealed to trap fumigants, making it less suitable for use once crops are already established. Seed soaking provides protection to seeds before or at germination and doesn’t address nematodes in a field with standing, actively growing crops. Foliar nutrient sprays do not impact soil-dwelling nematodes at all.

Delivering nematicide through irrigation targets the root zone where nematodes feed while the crop is actively growing. Chemigation uses irrigation water to move the chemical into the soil and around developing roots, so nematodes in the root zone are exposed as the crop takes up water and nutrients. This method is practical and effective during active growth because it reaches nematodes where they cause damage without disturbing the growing crop above ground, and it allows timing to align with irrigation schedules for efficient application.

Soil fumigation, by contrast, is typically done before or around planting when soil can be sealed to trap fumigants, making it less suitable for use once crops are already established. Seed soaking provides protection to seeds before or at germination and doesn’t address nematodes in a field with standing, actively growing crops. Foliar nutrient sprays do not impact soil-dwelling nematodes at all.