Control Grubs Using Natural Insecticide


First we strongly recommend following the techniques in the section here on Control Grubs Using No Insecticides.  We also strongly recommen you NOT use Japanese beetle traps.  They ultimately increase your beetle population rather than lower it.

Since we no longer recommend any fast acting synthetic grub control products your natural and organic options need to be viewed in the long term - 3 to 4 years for complete grub control.  We recommend a two step program.  In the first year, in September, we suggest you apply beneficial nematodes to your lawn. In September the grubs have hatched from the eggs and are close to the surface of the soil.  A week later we suggest you apply Milky Spore disease powder as directed by the label.  If you do this two years in a row, in the third year you should see little or no sign of any grub damage to your turf and that situation will last for up to 20 years because the Milky Spore lasts that long. 


In September Control With Predatory Nematodes

Achieve effective control of grubs by spraying an insecticide product containing predatory nematodes. These microscopic worms are packaged as a powder or in a gel and are activated by adding water. Spray the liquid slurry on infested turf or soil in the late afternoon or early evening as directed on the product label. The beneficial nematodes travel on a thin film of water through the soil and find their way to the grubs. When they burrow inside them to lay their eggs, they also transmit bacteria, which kill the grubs. This will, reduce a population of grubs by up to 80 percent within about 4 weeks. However, conditions in the soil, the age of the nematodes, and the effectiveness of the application may delay this result somewhat. Read label instructions. It costs roughly $10 to treat 1000 square feet of lawn with predatory nematodes. Because they are relatively expensive, they are most suitable for small areas.

In September Start Milky Spore Disease Program


St Gabriel Laboratories 7M Milky Spore Grub Mix 80080-2 Grub Control


20 LB, Covers 7,000 SQFT, Milky Spore Grub Control Spreader Mix, Organic Compound Attacks The Larvae Of Japanese Beetles, Apply With Spreader Anytime From Spring Through Fall, Kills Grubs For 15 To 20 Years, Harmless To All Other Living Things & Will Not




Milky Spore Applicator

by Gardener's Supply Company

This dispenser takes the work out of treating your lawn with Milky Spore. Long tube has a shaker top Holds up to 2-1/2 lbs. of milky spore powder, enough to treat up to a quarter acre May be used to dispense other garden dusts




 Optional In September Control Grubs By Spiking
White grubs feed nearest the surface of the soil in late spring and again in August and September. That is the time when you can kill many of them with some form of spiking tool that has sharp tines at least 2 inches long. Golf shoes do not do the job, but special shoes with spikes attached to the bottom are now available. You can also purchase a hand spiking tool that does a good job. The more spike holes in the turf the more grubs killed and the better your soil. Research shows that turf that is spiked frequently contains about half as many live grubs, and grows stronger plant root systems because the spiking aerates the soil. In planting beds, prior to planting dig into the soil a few inches and turn over shovelsful to surface grubs for birds to eat.

Yard Butler M-7C Lawn Spike Aerator

by Yard Butler

  • Reduces soil compaction, water run-off and puddling
  • Lets air, water and fertilizer get down to the roots
  • Breaks down thatch
  • Promotes vigorous root growth, strengthening tolerance to drought and heat stress
  • If Used in September you may be killing the new crop of white grubs recently hatched from Japanese beetle eggs. 
  • Extra durable, all steel construction
Is Your Lawn Gasping For Air?The Yard Butler Spike Aerator has sharp spikes that slip into the ground to loosen the soil, and a smooth, strong "powder coated" resin finish that resists rusting . Old lawns and lawns where a lot of activity takes place become compacted. Also thatch from dead leaves builds up creating a barrier, keeping water and air from reaching the roots. The symptoms are thin turf with poor color and bare patches that don't respond to watering and fertilizer.
M-7C Features: -Spike aerator. -Four heavy duty spikes that loosen compacted soil and penetrate thatch. -Allows deep watering for greener, healthier lawns. -Dimensions: 37'' H x 10'' W x 1'' D.



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