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The Daily Insight

How do you use milky spore

Author

Rachel Hickman

Published Apr 01, 2026

It is most effective to apply Milky Spore in the summer and early fall. The soil must be above 65 degrees F when the grubs are actively feeding, which is the best time for application. It works best to apply just before rainfall, or water in lightly after application to soak into soil.

When should I apply milky spore to my lawn?

It is most effective to apply Milky Spore in the summer and early fall. The soil must be above 65 degrees F when the grubs are actively feeding, which is the best time for application. It works best to apply just before rainfall, or water in lightly after application to soak into soil.

How long does it take for milky spore to be effective?

Milky Spore Powder begins working as soon as it is applied as long as grubs are feeding. Once grubs are infected they will multiply the spore by several billion times and spread it further. In warm climates good control can occur in one to three years. In colder areas, it may take three to five years.

How often should milky spore be applied?

Milky spore powder is typically applied in a matrix pattern, a teaspoonful every four feet in rows four feet apart. Some newer formulations allow for application through a drop spreader. It is much easier to apply but must be applied three times a year for two years as opposed to just once.

Can you put milky spore on wet grass?

Can Mlky Spore Granules be spread on wet grass? If the ground is wet, this will help to carry the milky spore into the soil. It is ok to apply the Milky Spore Granules now that the grass is wet. You want to apply 3 times a year for 2 years.

Which is better milky spore powder or granules?

For long term treatments, we would recommend using Milky Spore Powder. This is a slower acting product, but it will last about 15-20 years in the soil after one application. With Merit Granules, it is most effective when applied prior to, or just after, egg lay.

Can milky spore be applied in spring?

Milky Spore Powder can be applied any time the ground is not frozen since it will need to be watered in, but you generally get the best results applying April through November. You may get faster control with Milky Spore when applying in the Spring and late Summer, when grubs are actively feeding.

Can you use a broadcast spreader for milky spore?

Milky Spore Spreader Mix is too light to be used with a broadcast spreader. It must be placed in concentrated areas on the lawn and that is why it must be used with a drop spreader over every square foot of grass. … Milky Spore Spreader Mix is too light to be used with a broadcast spreader.

Does milky spore get rid of moles?

According to Planet Natural.com, Milky Spore is a safe, organic way to eliminate moles, because it only works on the grubs and doesn’t infect people, pets or even the moles. It just deprives moles of a major food source.

Does milky spore harm earthworms?

Milky spore is a bacterium specifically for killing white grubs, which are the larvae of Japanese beetles. Although it may affect some other types of grubs, it will not harm earthworms, pets or wildlife. Milky spore needs to be in the soil for about three years before it becomes completely effective.

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Why is milky spore banned in some states?

Answer: Milky Spore is not for sale to all states because these states do not have Japanese Beetles, the only insect this product will work for. White grubs can be other insects as well and other products are needed.

Does milky spore harm dogs?

Milky Spore is an all-natural product that will not harm dogs or other non-target animals.

Does milky spore work on all grubs?

Milky spore disease is a bacterium that was initially referred to as Bacillus popillae, but it is now known as Paenibacillus popillae. The bacterium is applied to turfgrass as a dust. It is effective only in controlling Japanese beetle grubs; it has virtually no activity on other grub species.

Can I use grubex and milky spore together?

Answer: Milky Spore can be used when other insecticides have been used but if you kill off the grubs before you use the Milky Spore than the spore will not have a way to multiply to kill off future grubs. Milky Spore will not harm earthworms. 57 of 61 people found this answer helpful.

What is milky spore made of?

Milky Spore uses the naturally occurring bacterium, Paenibacillus popilliae. This bacillus primarily targets Japanese Beetle grubs, the soil-dwelling larval stage, before they become the destructive adults. These grubs target lawn and garden soil, causing unsightly damage to turf and crop loss where they are active.

What is the best treatment for grubs?

To kill grubs in the spring or fall, use carbaryl or trichlorfon. Always wear rubber gloves and rubber boots when applying insecticides to turfgrass. Make sure to irrigate the lawn with at least 0.5 inches of water* and allow the grass to dry before allowing anyone or pets into the treated area.

Is milky spore safe for vegetable gardens?

Is Milky Spore Safe? Milky spore disease is specific for Japanese beetles and it won’t harm humans, other animals, or plants. It is safe to use on lawn and ornamental plants as well as vegetable gardens.

Does milky spore harm birds?

Milky Spore does not affect pets, beneficial insects, fish, bees, birds, other animals, plants, or man. It is not a poison.

Does milky spore expire?

Milky Spore has unlimited shelf life as long as it is stored in a cool dry place. … Milky Spore is not a chemical pesticide. The only thing that Milky Spore affects is Japanese Beetle Grubs.

What is the fastest way to get rid of moles in your yard?

  1. Mole trap: A mole-specific trap is considered the most effective way to get rid of moles. …
  2. Baits: Moles feed upon earthworms and grubs. …
  3. Remove the food for moles: Moles feed on various garden insects, such as earthworms, crickets, and grubs.

What is a milky disease?

The term “milky disease” is derived from the opaque white color that characterizes diseased larvae and results from the accumulation of sporulating bacteria in larval hemolymph (blood). The disease is initiated when grubs feeding on the roots of grasses or other plants ingest the bacterial spores.

How do you spread granular milky spore?

  1. Fill the drop spreader with the Milky Spore Granular.
  2. Apply uniformly over the treatment area. …
  3. Spread over the treatment area at the rate of 1 lb per 350 sq. …
  4. Water the treated area and/or apply beneficial nematodes within 24 hours of application to soak spores into the soil.

What is drop spreader?

Drop spreaders are made up of a bucket-type container, usually mounted on two wheels, with a raised handle so you can push. As you walk, the spreader drops the product directly on the ground beneath. Drop spreaders work best for small lawns or areas that need precise applications.

Do nematodes eat grubs?

Beneficial nematodes and the bacteria they spread are not known to be harmful to humans, animals, plants, earthworms and other non-target organisms, but they do aggressively pursue insects like grubs. … Beneficial nematodes have been shown to be as much as 96% effective against Japanese beetle grubs in field studies.

Are nematodes beneficial?

Beneficial Nematodes are microscopic, non-segmented roundworms that occur naturally in soil throughout the world. Inside the nematode’s gut is the real weapon — beneficial bacteria that when released inside an insect kill it within 24 to 48 hours.

Are Japanese beetles grubs?

Japanese beetle larvae or grubs are an off-whitish color and resemble an arc shape or the letter “C”. These grubs live in the soil during development and survive by feeding on the roots of grass. … Japanese beetle larvae spend months in the soil during their development stages.

Do Japanese beetles feed at night?

The reason is it may be a different type of beetle such as Northern Masked Chafers which predominantly feed at night the same time of year that Japanese Beetles are active.

Is milky spore harmful to cats?

If the damage in the turf is caused by chafers or June beetles, milky spore will not be an effective tool. This product has low toxicity to people and pets.

What are nematodes for grubs?

Quick Facts | Nematodes and How They Work Nematodes are microscopic beneficial insect that are a natural predator to grubs. … Nematodes travel through water particles beneath the surface of your lawn and attack grubs who are feasting on your lawn’s roots. Nematodes will continue to multiply until all the grubs are gone.

How do you get rid of grubs naturally?

  1. Encourage birds to hang out in your yard. …
  2. Feed your chickens. …
  3. Limit irrigation. …
  4. Relocate them. …
  5. Treat with milky spore. …
  6. Introduce beneficial nematodes. …
  7. Apply neem oil. …
  8. Repel the beetles.

What is the shelf life of GrubEx?

original GrubEx. Easily apply with a Scotts broadcast, drop, handheld, or Wizz spreader and stop grubs before they damage your lawn. One application kills and protects for 4 months.