Nematodes Controlling Lawn Pests Naturally Nematodes are naturally occurring, microscopic worms that are applied to lawns for control of White Grubs. They infest and kill their prey within 24 - 48 hours and take 7 – 21 days to clear the area. They continue to reproduce, with the young seeking out new pests to infest. When do I apply Nematodes? Apply Nematodes as soon as possible after purchase during rainy, overcast weather. Nematodes are sensitive to sunlight and temperatures below 13C. Apply when insects are actively feeding with a hose-end-sprayer. Mid-May, Mid-June End-August Early-Mid September How do I apply Nematodes? Before applying, water your lawn thoroughly (or apply them during/after a rainfall).
  • · Nematodes are stored on a damp sponge that covers 3,000 Sq. feet.
  • · Place the sponge into the hose-end-sprayer and fill with water, shaking vigorously for 15 - 30 seconds.
  • · Attach garden hose to sprayer and turn on valve to begin spraying. Start spraying in most affected area of lawn first and complete spraying outwards to provide total nematode coverage.
  • · After application, water for 30 - 45 minutes
To optimize performance: Water 30 - 45 minutes each day for the next 3 days to ensure nematodes are flushed into the root zone, where feeding grubs are present. Other Facts: If your coverage area is less than 3,000 Sq. feet, you may apply the remaining solution to vegetable and flower gardens.