
Does milky spore kill grubs?
Milky Spore is a natural bacteria that infects the grubs of Japanese Beetles with Milky Spore Disease. The disease paralyzes and kills the host grub. Where does Milky Spore come from? Paenibacillus popilliae (formerly Bacillus popilliae) is a soil-dwelling, Gram-positive, rod-shaped bacterium.
What does milky spore kill?
Milky Spore targets and kills Japanese beetle grubs, a familiar destructive pest, before they can grow into adult beetles. At the immature stage, Japanese beetle grubs feed on the roots of lawns, turf, and other grassy areas. Milky Spore is safe for people, pets, wildlife, beneficial insects, and soil microorganisms. Click to see full answer.
Will 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.
How to apply milky spore granules to your lawn?
- Apply the spore granules in the spring before grubs are starting to hatch.
- Apply again in the summer, and then in the latter part of fall. ...
- While the times can vary a little, the first application will need making before hatching, so the grubs will begin eating the spores as soon as possible. ...

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.
Is milky spore natural?
Milky spore powder is a biological control — a naturally-occurring soil organism that is deadly to Japanese beetle grubs that ingest the spores in warm soil. Those points are important. Even though milky spore is sold in the spring, but it does not work in the spring.
Is milky spore harmful to humans?
One of the benefits of organic pest control products like milky spore is that they're completely non-toxic to humans, pets, and beneficial insects. Milky spore won't harm any living thing other than Japanese beetle grubs.
What is milky spore good for?
Both milky spore disease and beneficial nematodes help control grubs in lawn and garden. Depending on the species of grub, you may want to use both. Scarab grubs, the broad group of white grubs that feed on grass roots, are difficult to differentiate.
Can you apply too much milky spore?
Answer: Per St. Gabriel the manufacturer, you can never put too much down. You can switch to the Milky Spore Powder. you want to apply 1 tsp every 4 feet.
Will milky spore get rid of moles?
The best long-term control is Milky Spore. Safe for the environment, this natural spore is harmless to fish, birds, bees, animals, plants and people. It kills grubs in the soil and remains active in the soil for up to 15 years. This is a great long-term solution for moles.
What happens if you inhale milky spore?
Milky spore is not toxic to humans or animals, but the spores are in a powder carrier form that can irritate eyes and throat. It also contains chalk. Wheezing, shortness of breath, tightness in the chest and coughing may occur in those with preexisting respiratory problems such bronchitis, emphysema or asthma.
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.
Should I use milky spore on my lawn?
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 expire?
Answer: Milky Spore Powder has a shelf life of 3 years.
How much milky spore do I need for 1 acre?
ten poundsUse 10 oz~ to treat 2,500 sq. ft., 1 pound for 4,000 sq. ft., 2.5 Ibs for 10,000 sq. ft., or ten pounds of MILKY SPORE powder per acre of lawn.
Can milky spore be applied with fertilizer?
Milky spore can also be distributed over your lawn in granule form. This involves using a broadcast spreader. In this case, the milky spore has been embedded into small granules. If you like, you can spread your milky spore granules on your lawn along with granulated fertilizer.
Should I use milky spore on my lawn?
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.
When should I put milky spore on my lawn?
Milky spore can be applied anytime during the year, except when the ground is frozen. Fall is considered to be the best time to apply the treatment, as the grubs are close to the surface of the warm soil, feeding on roots.
How much milky spore do I need for 1 acre?
ten poundsUse 10 oz~ to treat 2,500 sq. ft., 1 pound for 4,000 sq. ft., 2.5 Ibs for 10,000 sq. ft., or ten pounds of MILKY SPORE powder per acre of lawn.
Does milky spore have a shelf life?
Answer: Milky Spore Powder has a shelf life of 3 years.
What is milky spore?
Long before horticulturalists coined the terms “integrated pest management” and “biological controls,” the bacterium Paenibacillus papillae, commonly called milky spore, was commercially available to control Japanese beetle larvae, or grub worms. Although it isn’t new, it is still considered one of the best methods of control for Japanese beetles. After the larvae eat the bacteria, their body fluids turn milky and they die, releasing more of the bacterial spores into the soil.
How to apply milky spores?
Knowing how to apply milky spore is important for effective control. Place a teaspoon (5 ml.) of milky spore powder on the lawn, spacing the applications about 4 feet (1 m.) apart to form a grid. Don’t spread or spray the powder. Water it in with a gentle spray from a hose for about 15 minutes.
How long does it take for milky spores to work?
When using milky spore for lawns, it can take three years to achieve control of the insect in warm climates, and even longer in cooler areas. You can also use milky spore in vegetable gardens without fear of crop damage or contamination. Ideal soil temperatures for using milky spore are between 60 and 70 degrees F. (15-21 C.).
Can you mow with milky spore?
Once the powder is watered in, you can safely mow or walk on the lawn. One application is all it takes. Mil ky spore won’t completely eliminate Japanese beetle grubs from your lawn, but it will keep their numbers below the damage threshold, which is about 10 to 12 grubs per square foot (0.1 sq. m.). Although Japanese beetles can fly in ...
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. There is no risk of contamination due to runoff into bodies of water and you can use it near wells.
What Is Milky Spore Powder?
Milky spore powder or granules have been in use for about eighty years. Source: Mike Baehr
Should You Use Milky Spore Powder?
Grubs of the Japanese beetle are susceptible to milky spore disease. Source: Travis S.
Other Methods for Treatment
As mentioned in the application discussion above, nematodes (specifically Heterorhabditis bacteriophora, often shortened to Hb) are often used in conjunction with milky spore. You may be able to skip the milky spore altogether and instead use nematodes, which are a better option if you’d like to control a host of other pests and Japanese beetles.
How many spores are in a milky spore?
Each of the spots will contain as much as 100 million spores. Milky spore is too light to be applied with a broadcast spreader, so it must be applied by hand in concentrated form.
What is milky spore used for?
Milky spore is a bacteria that is used to control Japanese beetles and similar species. Since it is a completely natural material, it does not adversely affect pets, humans or the environment.
What is the milky spore in Japanese beetles?
Milky spore, or bacillus popilliae, is a bacteria that dwells naturally in so il. It is a rod-shaped bacterium that infects the grubs of Japanese beetles, which can cause serious damage to lawns and gardens. These grubs can dig deeper into the soil and survive during the cold months. Milky spore in the soil is eaten by the grubs during their active feeding season in the summer months. The bacteria reproduces inside the grub, killing it within 7 to 21 days. As the infected grub decomposes, it releases more milky spore into the soil. The spores can survive in cold weather and in drought conditions to continue to kill Japanese beetle grubs.
Is milky spore harmful to humans?
Since it is a completely natural material, it does not adversely affect pets, humans or the environment. There are no known health risks associated with milky spore use, but care should be taken when working with the bacteria. Advertisement.
Is milky spore poisonous?
Milky spore is not toxic to humans or animals, but the spores are in a powder carrier form that can irritate eyes and throat. It also contains chalk. Wheezing, shortness of breath, tightness in the chest and coughing may occur in those with preexisting respiratory problems such bronchitis, emphysema or asthma.
What is milky spore?
Learn more... Milky Spore is a natural pest control that targets grubs such as Japanese beetles. Spread the powdered pores over your lawn. Once the grubs ingest the spores, the spores multiply and eventually rid your lawn of the grub infestation.
How to spread milky spore?
To spread the powder, use a lawn and garden dispenser to apply Milky Spore every 4 feet (1.2 m) in a grid pattern across your yard. Lightly water the soil so that the powder is absorbed, and enjoy a grub-free lawn after 1-3 years. Steps.
How big should a nail hole be for a milky spore?
The nail holes should be big enough for the Milky Spore to pass through, but they don't need to be huge—a medium-sized nail should work.
How to make a milky spore dispenser?
Create your own dispenser using a coffee can, if necessary. If you don’t want to purchase a dispenser just for applying the Milky Spore powder, create one using an old coffee can and a 4 ft (120 cm) long stick. Punch 15 holes in the bottom of the coffee can using a nail, and attach the coffee can to the stick using duct tape.
How long does milky spore last?
Once it has been treated, the Milky Spore should work for at least 10 years without another treatment.
How to get milky spore off the ground?
If you’re watering the ground yourself, use a spray hose with a softer spray setting — you don’t want to spray the ground so intensely that the powder washes away. If you're applying it before rain, make sure the rain is going to be light as opposed to a heavy storm that will wash the Milky Spore away.
How long does it take for milky spore to soak in the soil?
Water the ground lightly so that the powder absorbs into the soil. Try to water the soil immediately after you apply Milky Spore, but at least within 24 hours. Apply it right before it’s about to rain and let the rain help the powder soak into the soil, or lightly water the soil yourself.
Why is milky spore not used?
Milky spore comes in a powder and consists of a bacteria. The first reason not to use milky spore is that it was manufactured to control ONLY Japanese beetle grubs. Unfortunately there are many more turf damaging grubs in NH and VT including Asiatic beetles, European and masked chafers, June and May beetles and armyworms.
Can you use milky spore in lawn?
Updated June 24, 2019. According to a University of New Hampshire publication on milky spore disease, there are more reasons NOT to use this product than to use it in your home lawn. Milky spore has been around for decades and was the first biological disease to control Japanese beetle grubs. Milky spore comes in a powder and consists of a bacteria.
Can milky spores control Japanese beetle grubs?
So now you understand that even if milky spore could work, you would only be controlling one grub out of many …not good odds. Secondly, you must have sufficient numbers of Japanese beetle grubs in your lawn to promote the bacterial population enough to expand and spread out in the soil.
What is milky spore?
Milky Spore is a bacterium that infects and kills grubs. You apply milky spore to your lawn and water it in so grubs become infected by swallowing a spore when feeding on grass roots.
How long does milky spores last?
As time passes, the spores will spread to neighboring lawns. This bacterium becomes more effective over time and has a life span of 15 years. Milky Spore is approved by the EPA. It is a safe material to kill grubs.
Is milky spore toxic?
Milky Spore is approved by the EPA. It is a safe material to kill grubs. It is not toxic to insects, birds, pets or humans. It will not affect wells, ponds or streams. Also, it is harmless for food crops.
What temperature does milky spore disease occur?
In the North, milky spore disease does do very well in the cooler soil temperatures. Milky spore disease will do best when soil temperatures are between 60 and 70. These soil temperatures occur for a very short time in northern climates.
Can milky spores kill Japanese beetle grubs?
Milky spore disease will only control Japanese beetle grubs. While Japanese beetle grubs can cause major damage in your lawn there are other grubs that also cause major damage. Often times European chaffer grubs are the major issue. These two grubs look very similar.
