Nematode for Grub Control August 1, 2008 I am looking for a particular species of nematode for grub control. Can you ID the species that you distribute? Thanks for any help. Darrell 3 Pumpkin Plant Has No Female Flowers Photo of the Heirloom Tomato Plants we purchased! About jstutzman You Might Also Like My magnolia tree will not bloom October 28, 2009 Why Are My Pepper Plant Leaves Turning Yellow? September 15, 2015 When Should I Pick My Gourds? September 9, 2009 3 Comments Reply Karen August 1, 2008 at 9:04 am Entomopathogenic nematodes are microscopic worms that live in the moisture between soil particles, and are a natural predator of white grubs, the larva stage of many garden beetles. They already exist in your soil in many species and there are some that burrow into the roots of vegetables and perennials, creating “knots” in the roots that can cause plant damage. Other naturally occurring species help control grubs and sod web worms and other garden pests. Each of these targets (pests, grubs) have a different growth and development cycle, so there are different nematode species that target the different pests. The most widely commercially available varieties sold specifically that target the grubs in turf, are the Hb strain that is targeted toward the Japanese Beetle grub and chafers; the Sc strain for web worms and cut worms; and the Sf strain that targets fungus gnats and some flies. The downside of nematodes is that they are a living organism, so if not handled properly during packaging, shipping and storage they most likely won’t survive, plus there is an optimal time and soil temperature when they should be applied for them to work. We don’t carry nematodes, but if you choose to apply them, try using them in combination with our Milky Spore Powder which has a much more flexible application time. Nematodes are usually applied at a very specific time in the spring just as the semi-mature larva are approaching the surface to pupate. The nematodes are not digested but rather infest the larva, in order to work. Milky Spore is ingested by the grub and it causes death. It will remain active in the soil for a greater time. Reply Judi October 3, 2008 at 9:29 am Does Diotomaceous Earth (DE) do the same thing as the nematodes and the Milky Spore? Meaning kill the slugs and Japanese Beetle grubs? Reply Karen October 6, 2008 at 10:13 am Diatomaceous earth can be used to control grubs, but it might not be the best solution for lawns and pre-existing gardens. To be effective, it needs to be mixed into the soil to a depth of six inches at a rate of 1/2 cup per square foot. It would need to be applied annually in the early spring, when the grubs are most active. Its best use is application around the base of plants during the summer months to control everything from bean beetles to squash bugs. Diatomaceous Earth has a moderate effect on slugs. Leave a Comment Cancel Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.