
How do you treat milky spores? 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.
- What you'll need. ...
- Step 1: Apply in early fall. ...
- Step 2: Cover yourself. ...
- Step 3: Fill your spreading device with milky spore product. ...
- Step 4: Cover the whole lawn with milky spore. ...
- Step 5: Water milky spore into the ground.
How to apply milky spore to your lawn?
It is very easy how to apply milky spore to your lawn garden. However, it is best to follow these simple guidelines on how to do it for the best effect. The simplest way, how to apply milky spore powder is to place a teaspoon of milky spore around your lawn about four feet apart from each other.
How do you use milky spore to kill grubs?
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. 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.
How often should I apply milky spore powder?
The spore reproduces itself by several billion in a short period of time and the effectiveness can last up to 10 years. This means you usually only need to apply milky spore once. For a more targeted approach, apply milky spore powder around the base of infected plants.
Does milky spore need to be wet to work?
The soil doesn't need to be damp or wet for you to apply the Milky Spore. Pour the Milky Spore powder into a lawn and garden dispenser. These work best for distributing the powder — if you use a regular spreader, it’s likely that the powder will blow away once it’s been dispensed.

How do you put down milky spores?
0:020:52How to Apply Milky Spore - YouTubeYouTubeStart of suggested clipEnd of suggested clipThe way you'd want to put this down is hit the ground about once every four feet in a checkerboardMoreThe way you'd want to put this down is hit the ground about once every four feet in a checkerboard pattern.
When should I treat my lawn with milky spores?
To reach maximum spore levels in the soil and achieve best grub control, Milky Spore Granular should be applied before grubs hatch in the spring, summer and fall for 2 consecutive years. The times of year can vary somewhat as applications can be made any time the ground is not frozen.
Is milky spore harmful to humans?
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 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.
How long does milky spore last?
How long does milky spore last? Milky spore bacteria remain active in your soil for up to 10 years. Sometimes, the bacteria last 15 to 20 years, as long as there's a continuous supply of grubs to recycle and spread them.
Does milky spore work right away?
Milky Spore Powder only needs to be applied once. It 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.
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.
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 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 much milky spore do I need for 1 acre?
Answer: One 40 oz. container of Milky Spore Powder will treat about 10,000 square feet, so if you need to treat just over 1 acre you would need five 40 oz.
Does milky spore harm bees?
Milky Spore Powder is a natural, safe and effective grub control product that is OMRI certified organic. It does not affect pets, beneficial insects, fish, bees, birds, other animals, plants, or man. It is not a poison.
Can milky spore be applied with fertilizer?
If you like, you can spread your milky spore granules on your lawn along with granulated fertilizer. Read package directions to determine the proper settings for spreading an effective application of milky spore.
Can milky spore be applied with fertilizer?
If you like, you can spread your milky spore granules on your lawn along with granulated fertilizer. Read package directions to determine the proper settings for spreading an effective application of milky spore.
How much milky spore do I need for 1 acre?
Answer: One 40 oz. container of Milky Spore Powder will treat about 10,000 square feet, so if you need to treat just over 1 acre you would need five 40 oz.
How do I treat white mold on my lawn?
Mix one tablespoon of baking soda with a gallon of water. Spray affected areas every three days until the mold or fungus is gone. These last two options work to both smother some plant pests and keep fungus in check. Horticultural oil is safe for use on lawns, turf and plants.
Does milky spore work on all grubs?
Milky spore is a disease that's effective only against the Japanese beetle grub. If your damage is due to the grub of the masked chafer beetle -- also fairly common -- that would explain why your treatment has been ineffective.
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.
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 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.
How to apply milky spore to your lawn in 5 steps
Milky spore powder or granules (available online or wherever you buy garden supplies)
What is milky spore?
Milky spore ( Paenibacillus popilliae) is a bacterium that has been used for Japanese beetle control since the 1940s. When Japanese beetle larvae (aka grubs) ingest the spores of this bacterium, they get a fatal disease known as milky disease or milky spore disease.
How to tell if your lawn has Japanese beetle grubs
Remember, milky spore will only help your lawn if the problem is Japanese beetle grubs. If you’re dealing with any other pest or lawn disease, applying milky spore would be a waste of time and money.
When not to use milky spore
What if the grubs in your lawn are the larvae of other species of beetles, not Japanese beetles? Or what if you want to see results fast? Milky spore isn’t right for you in these cases. But that doesn’t mean you have to let the grubs win.
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.
When to Apply Milky Spore Powder?
The best time to apply this pest management compound is during the early fall. At this time, the beetle grub will be busy feeding to increase their weight for the winter.
Why are milky spores used?
Milky spores have been in production since the 1940s specifically for pest control against the Japanese beetle grub, which is the only known organism to be vulnerable to the Milky Spore disease.
What is the Difference Between Milky Spore Granules and Milky Spore Powder?
There isn’t much difference between Milk Spore powder and granular Milky spore. The difference is the application of each. Neither being difficult yet one is a little easier than the other.
How to get proper coverage of lawn?
The best way to obtain proper coverage is to make crisscross passes with your spreader. Once you have covered your lawn, then you can water all the areas you have treated. You do need to be sure all the granules are water into the lawn before you can walk on it, or before it is ready to mow.
What is the cause of brown spots on my lawn?
Japanese beetle grubs can cause severe damage to your lawn in a short span of time. To make it worse, the Japanese beetle larvae love to feed on the grass roots, leaving ugly dead brown spots on your lawn. While adult beetles are difficult to kill, their larvae are vulnerable to several different biological treatments, ...
How long does it take for a beetle spore to grow?
The spores become active in warm, moist soil and can take up to three years to take effect. USDA has cleared the product for use on beetle larvae. They claim it is not harmful to humans, animals, and birds.
When to apply granular grub?
The granular type is made to be used with a drop spreader, hence the ease of application. The time to apply is early in the season before they hatch , and there is no sign of grub damage.
When to apply milky spore?
When and How to Apply. 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.
What Is Milky Spore?
Milky spore is a naturally occurring bacteria that is reproduced by St. Gabriel Labratories (See References). The active ingredient in milky spore is bacillus popilliae. The spores are activated in warm, moist soil.
How long does it take for milky spores to penetrate?
It is recommended that any treated areas be lightly watered 24 hours after application. Milky spore takes two to four years to thoroughly penetrate an area.
Can you use milky spores to kill beetles?
To be more effective, after treating with milky spore, you can continue to use other treatments to eliminate adult beetles. After the application of milky spore, the Japanese beetle grubs begin feeding on the spores.
Is milky spore harmful to birds?
It states that milky spore is not considered harmful to humans, birds, dogs, and other animals . This all-natural, organic treatment will not destroy insects that are beneficial to your garden or negatively impact the water supply including wells, ponds and rivers.
Can you use milky spore on beetle grubs?
The USDA has approved milky spore for use on the beetle grubs. What cannot be seen is the damage beetle grubs do to the roots below the surface. To be more effective, after treating with milky spore, you can continue to use other treatments to eliminate adult beetles.
When to apply milky spores?
When to apply Milky Spore Granules depends a bit on if you have a grub problem to begin with. Once you have identified that you have a grub problem, you will want to apply this product.
How long does milky spore last?
Because of this entry and reentry process Milky Spore Granules go through, this product can be effective for up to 10 years.
What are Milky Spore Granules?
Milky Spore is a natural, organic insecticide that directly targets the Japanese Beetle Grub.
Do you need to apply grub control?
Depending on how severe the damage, you may only need to apply grub control. For the purpose of this article, we will assume that you only need to apply a control product because you’ve caught the problem early enough. There are many grub control options on the market, and Milky Spore Granules is one of them.
Is milky spores safe for Japanese beetles?
When the Japanese beetle is in this stage of life, it is susceptible to the deadly effects of Milky Spores. The great thing about Milky Spores is that they are economical, safe and easy to use, 100% organic, contains no harsh chemicals, and work for years.
Do milky spores go to waste?
This is part of what makes this product so effective, and it doesn’t go to waste or wash away if it’s not being used, it simply waits.
Is milky spore effective against Japanese beetles?
Here’s a video that demonstrates how to apply Milky Spore Granules. Even though Milky Spore Granules are very useful in fighting off Japanese Beetle Grubs, it is ineffective in combating any other pests. However, it is effective in other species if it comes in contact with their larval form; otherwise, it stays ineffective.
How to apply milky spore to lawn?
It is very easy to apply using a commercial dust dispenser or a similar, homemade device. Apply one teaspoon of milky spore powder to your turf or garden every four feet in rows four feet apart. (It will look like a grid pattern when you’re finished.) Next, water in the spore so it can reach the grubs in the soil. Be sure not to mow the lawn until you’ve completed this step.
What is milky spore?
Milky spore is the common name for the bacteria B. popilliae, the active ingredient in some pest control products used to control the Japanese beetle ( Popillia japon ica ). This insect was brought into North America through New Jersey in 1916 from Japan.
How to get rid of grubs in lawn?
Apply one teaspoon of milky spore powder to your turf or garden every four feet in rows four feet apart. (It will look like a grid pattern when you’re finished.) Next, water in the spore so it can reach the grubs in the soil. Be sure not to mow the lawn until you’ve completed this step.
Why does milky spore take so long to work?
Because milky spore works through ingestion, it can take time to work.
When to apply beneficial nematodes?
Apply beneficial nematodes when the soil temps are above 45 degrees F and ensure soil is kept moist for the weeks following. When the adults emerge in June, go out in the dark with a bucket of soapy water to areas of suspect invasion. Knock beetles off into bucket of water and allow them to drown.
When to apply grub spray?
Can’t be applied at any time of year. The soils must be above 65 degrees F, when the grubs are actively feeding. It’s best applied in the summer and early fall.
Is milky spore safe for Japanese beetles?
Milky spore has many attributes that make it a suitable choice for Japanese beetle control. Extremely safe for use around children, pets, and non-target species. Compatible with other pest control measures, such as beneficial nematodes and commercial insecticides.
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.
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 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.
When to use a grub sprayer?
It is best used in late September or October in overcast conditions, according to the North Carolina State University Extension Service. Advertisement.
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.
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.
