Treatment FAQ

when to apply grub treatment in summer

by Mr. Darren Koch Published 3 years ago Updated 2 years ago
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The best time to apply grub control is between early spring and late summer when there's increased grub worm activity in your lawn. For grub preventers, apply between June and July just before they hatch while for grub killers, apply the treatment from spring when you see signs of grass damage.Sep 7, 2020

Full Answer

When to apply grubex and obtain the best results?

Treating For Grubs

  • Nematodes. When you notice changes to your lawn which is indicative of grub activity, you’ll need to probe further to be certain.
  • Applying Effective Grub Killers Yourself. There are lots of over-the-counter remedies developed for grub infestation. ...
  • Calling the Experts. ...
  • Beneficial Organisms May Suffer. ...

When should Grub control be put down?

The best time to apply grub control is early spring (late March to late April). You can also apply a grub killer when you see signs of grub damage. Grubs turn into adult Japanese beetles from late spring to early summer, which is a good time to put down a grub preventer for the following season.

When to start treatment?

  • Being sick or depressed. How you feel mentally and physically can affect your willingness to stick to your treatment plan. ...
  • Alcohol or drug use. ...
  • If you need help finding substance use disorder treatment or mental health services, use SAMHSA’s Treatment Locator external icon .

When to treat for grubs?

  • There is no need to take action to get rid of the grubs if you find fewer than five per square foot.
  • If you find more than five but fewer than 10 grubs per square foot, you'll only need to treat your lawn if your grass isn't healthy.
  • Regardless of the state of your lawn, you'll need to get rid of the grubs if you find more than 10 per square foot.

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Can you apply GrubEx in hot weather?

Apply during spring or early summer to kill grubs as they develop. Using Scotts® GrubEx®1 Season Long Grub Killer annually can also help control Japanese beetle and Armyworm infestations.

Is July too late to treat for grubs?

Treating in late summer or early fall is ideal, as that is when the smaller, young grubs are most susceptible to nematodes. There is also usually a short window for application in early spring before the grubs get too big and pupate, but that is a narrower window and can be difficult to time properly.

Can I apply grub killer in late summer?

By the time damage is apparent it is much too late for preventive white grub products such as Merit and Grub-X. These must be applied before mid-August. Insecticides must be watered in to be effective.

Can I apply GrubEx in August?

You also can apply Mach II, Ortho's Grub-B-Gon or Scotts GrubEx in August, but because they are slower to work, your lawn may experience some grub damage before they provide full control. These products are best applied in July, so they can impact grubs as soon as they hatch.

When to apply grub control?

Grub preventive products should be applied in the spring when the weather warms to kill the overwintering grubs or in summer to kill the newly hatched grubs. Effective preventive grub control products contain chlorantraniliprole, imidacloprid, thiamethoxam or clothianidin ingredients.

How to stop grubs in lawn?

A large number of grubs in lawn are highly destructive and using a chemical treatment will be the fastest way to stop the problem. A preventive control is more effective as compared to a curative option of controlling grubs.

How long does it take for grubs to kill?

Apply these pesticides in fall or spring when grubs are most active. While most products will claim instant action, it may take up to 4 weeks for them to take full control over grub population.

What causes grubs to die in grass?

Grub damage in lawn. Grubs feed on roots of the grass and other plants which causes grass to die in patches. A large infestation can ravage the whole lawn. Grubs also attract predators such as birds, raccoons, and moles that tear up or dig holes in your lawn as they hunt for the grubs. More grub damage in lawn will be realized in late summer ...

How many GRUBs per square foot?

Less than 5 grubs per square foot may not affect a well maintained lawn – this does not indicate any need to apply a grub control treatment. However, if there are more than 5 grubs per square foot, it is very necessary to apply a grub control insecticide.

What are grubs in lawns?

Grubs are highly destructive to lawns and gardens. They feed on the roots of the grass and other organic matter in the soil, resulting in dead patches in your turf. Applying grub killers and preventers is the only way to stop the occasional grab damage.

When do grubs start to damage lawns?

More grub damage in lawn will be realized in late summer after the eggs have hatched into new grubs or in spring as they wait to pupate. If you dig around the edges of the affected area and roll the turf away from the soil, you will see the white grubs.

When is the best time to apply grub control?

So, what is the best time to apply grub control on your lawn? The best time to apply grub control is early spring (late March to late April). You can also apply a grub killer when you see signs of grub damage. Grubs turn into adult Japanese beetles from late spring to early summer, which is a good time to put down a grub preventer for ...

When is it too late to treat for grubs?

It is too late to treat for grubs in late summer (September) because white grubs will have turned into adult beetles that are hard to kill. Even spraying a grub killer on the lawn may not kill 60% of the beetles that are already feeding on the foliage and laying eggs in your lawn.

How often should you apply grub control?

You’ll need to apply grub control as per the stage of infestation in your lawn. But how often should you apply grub control?

How long do grub killer insecticides last?

Most grub preventers last between 60 and 90 days in the soil, which means they can control grub worms from the time they hatch to the time they become larvae. However, different products may have varying half-lives so it is important to do the timing properly before putting them down for the most prolonged control of grubs.

What is grub control?

Grub control comes in two types – grub preventers and grub killers. Prevention is the best approach to maintaining a healthy lawn, but sometimes, there will already be signs of grub damage in your lawn.

What is a good grub preventer?

A good grub preventer contains chlorantraniliprole, a compound that acts on the larvae of the grubs as they hatch. To ensure you have a grub-free lawn, you need to make sure the timing is right for the application.

How deep do grubs live in the soil?

Grubs live about 2 inches into the soil and this is where you need the treatment to reach. The best practice is to put down grub control granules or dust and then water the lawn to ensure the treatment kills grubs that are cutting the roots of your grass. You can also time to apply the grub killer just before it rains, ...

When to put down grub killer?

It is often best to put down grub preventers from April through mid-July when grubs are ready to hatch. If you want to stop grub damage right away, the best time to apply a grub killer to your lawn is when you first see signs of damage. This is typically any time between mid-summer through September when the grub larvae feed the most.

When to apply imidacloprid to grub eggs?

Most big box stores have consumer products with Imidacloprid which need to be applied from June through July before the grub eggs hatch.

What is a grub?

Learn the best times to apply grub control most effectively. Grubs are the lawn-damaging larvae of Japanese beetles, European chafers, Oriental beetles, and others. These white and C-shaped grubs feast on organic matter in your soil, including the grassroots.

Can grubs be harmful to turf?

In healthy turfs, grubs may not be a significant problem. However, you should apply grub control treatment when you see signs of damage. Otherwise, your turf can suffer significantly.

Do You Need Grub Control Every Year?

If you found grubs in your lawn last spring or fall, you may need to apply a grub preventer. You do not have to apply grub control annually unless you see grub damage. If you have been treating your lawn with a preventer and killer for successive years, it may be time to stop until you notice any signs of grub damage return.

When to apply grub control?

They will not work on grubs found in the lawn from the middle of October through the middle of May. However, when applied in June or July they provide excellent protection against the next generation of grubs. So, if you need to apply the preventive insecticide BEFORE the grubs are there, how do you know if you need to use an insecticide or not? If you confirmed grub damage the previous fall or spring, meaning you found lots of grubs, then you may want to use a preventive insecticide for one or two years to build a more dense turf that will be tolerant of grubs. If you have treated for several years and you do not see evidence of grubs in your lawn or in the neighbor’s lawn, it may be time to stop treating. There is an erroneous philosophy being perpetuated that because we have European chafers and Japanese beetles in the area, it is necessary to treat every year or your lawn will be damaged by grubs. This is not true.

When will grub control be available in stores?

Below is a short list of products now being sold for grub control as of May 22, 2020, in stores checked in the Mid-Michigan area. An online search indicates there are other products that will be available at other stores. Check the active ingredients.

How long does it take for carbaryl to kill grubs?

Both compounds work equally well on Japanese beetle grubs. It will take 10-14 days for the grubs to begin dying after the insecticide is applied. One trichlorfon product has “24 Hour Grub Control” in its name and would seem to indicate that it will kill grubs in 24 hours. However, even trichlorfon should not be evaluated for at least five days after application (assuming it rains or irrigation was applied), and carbaryl may need three to four weeks to be effective. Do not apply any curative compounds in the spring after May 15 as grubs stop feeding in late May as they prepare to pupate. As with the preventive products, lawns should be mowed immediately before applying carbaryl or trichlorfon to protect bees.

What products are not good for grubs?

Do not use products containing ONLY lambda-cyhalothrin, gamma-cyhalothrin, bifenthrin, deltamethrin, cyfluthrin or permethrin for grub control. Products containing only these ingredients will not work for grub control because the active ingredient binds with organic material and will not move down to where the grubs are feeding. These products work well for above-ground feeding insects that live on the grass leaves or soil surface, but not for insects that feed on the roots. At one garden center a clerk showed us two products, one containing only permethrin and one containing only bifenthrin, when we asked for products to control grubs. Neither of the products listed grubs on the label printed on the bag and neither of the products would have controlled grubs.

What insecticides kill grubs?

There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. They are short-lived compounds that kill all life stages of grubs. These two insecticides are the only options if high numbers of grubs are found in the fall and in spring before early May. Our research indicates they will kill 20-80% of grubs when applied in September or 20-55% when applied in late October. They are not as effective as the preventive compounds in reducing grub numbers.

Why do you need to mow before applying insecticide?

If you are applying a product containing clothianidin, thiamethoxam or imidacloprid, the lawn should be mowed prior to the application so that no weeds are flowering in the lawn when the insecticide is applied. These active ingredients can be toxic to bees if the bees visit flowers that were recently sprayed. Mowing prior to making the application will avoid this problem by removing the flowers. Weeds that flower again after mowing are much safer than weed flowers that were sprayed directly with insecticide, but some of the insecticide is absorbed by the roots and will move into the pollen and nectar. More research is needed on this, but it could cause problems for native bees or have long-term health effects on honey bees or bumble bees. If there is nothing flowering in the lawn, there is nothing in it that would attract bees.

When do grubs appear in lawns?

Grub damage may appear in home lawns from mid-September to November or from March to early May. However, for low-maintenance lawns, even if the turf is not killed from grub feeding, the thinned and weakened turf may be prone to weeds and drought stress. Healthy turf with a few grubs may not need an insecticide.

When Is the Best Time to Apply Grub Control?

Although, you should only start treating your lawn after you discover you have a grub problem . You don’t have to wait till that time to take precautions.

When to apply grub killer?

When applied in early fall (any time around September), you can be sure that at least grub mortality will rise by as much as 20%-80%. If you wait till late fall (anytime around late October), you might only be able to get rid of about 20%-50% of the grubs present in the lawn…

How to prevent grubs from attacking my house?

But if you’re one of those looking for a more natural way to prevent grub attack, you could go for a treatment of nema todes.

What is the best treatment for grubs?

The two chemicals usually considered as curative treatments for grubs are carbaryl and trichlorfon. They work to kill grubs at all life stages. These two products are probably your best bet if you have a serious grub problem during fall and spring.

How many grubs per square foot?

A healthy turf that is properly taken care of can support a grub population of five or more grubs per square foot without any visible damage on the lawn.

How to get rid of grubs in my lawn?

Pesticide Treatment. You could also apply pesticides to your lawn to take care of your grub problem. Make sure you do this on a day when the rain wouldn’t make your efforts futile. And of course, don’t forget to fully kit up. Safety is very important, even while doing these things.

When is the best time to get rid of grubs?

Summer is also a good time to go for grub control because what you’ll have to deal with are newly hatched grubs and not mature adults. During spring, when the weather is a little warm, you can apply chlorantraniliprole products. While in summer, you can use thiamethoxam and imidacloprid to attack emerging grubs.

When do grubs come back to the lawn?

When the soil warms up again in the spring, the large, mature grubs move back into the upper soil levels, where they transform into adult beetles that emerge in early summer and start the whole process over again. The key to controlling grubs is to kill them before they hatch and begin to cause damage to your lawn.

When to apply Scotts grubex?

• Applying a preventative grub control product in the spring or early summer will provide much better grub control than waiting until after the damage has occurred.#N#• Use a spreader to apply Scotts® GrubEx® 1. Be sure to follow application directions.#N#• To activate the product, water immediately after applying.#N#• A drought-stressed, underfed lawn will show grub damage faster, and with fewer grubs per 
square foot, than a properly-fed, well-maintained lawn.#N#• A properly maintained lawn can tolerate more grubs per square foot than a stressed lawn.#N#• Repair dead patches caused by grubs with Scotts® EZ Seed®.

How to control grubs in lawn?

The key to controlling grubs is to kill them before they hatch and begin to cause damage to your lawn. In spring or early summer, apply a preventative grub control product, such as Scotts® GrubEx® 1 to your lawn, following label directions. This is especially important if you’ve had problems with grubs in the past. One application of Scotts® GrubEx® 1 can kill and prevent grubs for up to 4 months.

When do grubs hatch in the lawn?

Beetles, like Japanese and chafer beetles, emerge in early summer, feed on plants in the garden, and lay their eggs in the soil in the lawn. Later in the summer, the grubs hatch and immediately begin to feed.

What is a grub in the lawn?

Grubs are the larvae of Japanese beetles, June beetles, chafers, and others. These white, C-shaped grubs feast on organic matter in the soil, including grass roots.

When Should I Apply Scotts GrubEx?

All season long, a single spray can stop and prevent grubs. To kill grubs as they develop, apply in the spring, or early summer kills them as the eggs hatch.

What insecticides kill grubs?

Carbaryl and trichlorfon are considered curative treatments and are toxic compounds that can kill grubs at all stages. The two insecticides here are your only options to prevent grubs found in large quantities in the fall or early spring.

How to clean stubborn stains with a mophead?

When cleaning, you can attack stubborn stains with one side, and for a final clean, you easily flip the mophead 180 degrees and use the other side.

Can you kill grubs in your lawn?

Grubs live through several stages, and the chemicals can kill grubs at various stages during their lives. Thus, you can easily waste money and not kill grubs in your lawn if you use the wrong product for the present life cycle.

Should I Apply GrubEx Before Rain?

Grubs are most harmful when sitting just beneath the soil’s surface, contentedly feasting on grassroots. Therefore, whether you apply grub control as a preventative measure or not, the most important thing to remember is to water the solution.

When to apply grub treatment?

This is easy to pinpoint. The months of August through October see the most grub activity on your lawn.

When is the best time to apply grub control measures?

The months usually having the highest record of grub activity (destruction of lawns through feeding) are late July, August, and September.

When Is It Too Early to Apply Grub Control?

Attacking grubs in early spring will be a bad idea.

What is grub control?

Grubs are synonymous with lawn damage and require adequate and far-reaching control strategies to check their activities. Part of the several considerations to make includes knowing when to apply grub control. This is as important as the actual process of getting rid of grubs. Grub control involves several things.

How many grubs are in a square foot?

Doing this will involve digging up parts of your lawn to observe the soil. When more than 5 grubs are found per square foot, treatment will need to commence immediately.

What is the best treatment for grubs?

Part of this treatment includes the use of beneficial organisms such as nematodes. Nematodes are tiny (microscopic) worms considered environmentally friendly and effective grub predators.

What is the best way to kill grubs?

Insecticides are known to be effective in grub control.

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