Treatment FAQ

when should grub treatment be used

by Prof. Hailee Durgan II Published 3 years ago Updated 2 years ago
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  • Understanding the Grub Lifecycle. Because beetles emerge in summer and stay alive for several months, grub control is appropriate at many different times during the year.
  • Timing Spring Grub Treatments. Spring can make homeowners antsy to get started on outdoor tasks, but performing some of them too early can impede their effectiveness.
  • Combining Fertilization and Weed Control With Grub Treatments. Do you know how healthy your yard is? Do you have the knowledge to gauge how much damage has been done?

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.

Full Answer

Is it too late to treat for grubs?

Aug 20, 2020 · If using a preventative treatment against grubs, aim to apply just before the grubs hatch – typically late spring or early summer. Because grubs are the offspring of June bugs, Japanese beetles, or European Chafers, they often recur season after season. Using grub control may take a few seasons before the problem is entirely taken care of.

Is it going to be good year for grubs?

Sep 05, 2021 · Those grubs start to much on your lawn straight away, but the feeding frenzy really kicks off in the fall. That’s why it’s best to apply grub control in either the early or mid-summer. You want to apply a product before any grubs’ hatch, but you don’t necessarily have to wait until the beetles lay their eggs.

What will kill grub worms?

Jan 16, 2022 · This product is most effective when the grub is actively feeding so applying it 2 to 3 months in advance of severe grub feeding from June to August is recommended. This ingredient is in two widely available products: GrubEx® and Roundup® For Lawns Bug Destroyer.

How to control grubs without chemicals?

When Is The Best Time To Kill Grubs? The best time to kill grubs is in the fall, but you can also treat them with a pesticide. Grubs are often found near trees and shrubs. You should give your lawn an inspection for signs of these pests before applying any pesticides. Remember that not all grub treatments will work on all types of grubs!

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What time of year do you treat for grub worms?

The best time for treating grub worms is in late summer or early fall while the grub worms are still small and close to the surface. Grub worms are less susceptible to treatment in the spring, as they are too large and no longer feeding. For this reason, insecticides are less effective.Jul 26, 2021

When should grub be gone applied?

SUMMER (late June – early August): Apply to control newly hatched grub larvae. Should be applied within 2-3 weeks of peak timing for adult beetles. FALL (late August – September): Apply to help control new grubs that have hatched from new beetle eggs throughout the summer.

When should I apply GrubEx to my lawn?

Because GrubEx targets the larval stage of many insects, the best time to apply it is when the beetles burrow into lawns to lay their eggs -- in spring to early summer. When the eggs hatch, GrubEx kills the emerging larvae so they cannot develop into mature insects.

How often should grub control be applied?

2 to 3 times a seasonNematodes also need to be applied when the species of grubs they control are active in the soil. If nematodes are being used curatively, they may need to be applied every 2 weeks until the infestation subsides. For those who use nematodes preventatively, they should be applied 2 to 3 times a season.Sep 20, 2019

Will grub damaged lawn grow back?

If you have areas of dead turf, you'll need to re-seed them. Some areas will need to be scraped clean, soil added, and seeded. However, some areas may just warrant slice-seeding to repair them. Either way, they aren't coming back on their own.Sep 5, 2013

How soon after treating for grubs can you plant grass seed?

If the grubs damaged your lawn so badly you had to replace grass; then you may choose to put the grass seed before or after the grub treatment. My advice? Wait for the new grass to grow first.

Should I apply GrubEx before rain?

Should I Apply GrubEX Before Rain? Applying GrubEX before heavy rain is the only way to skip the watering step altogether. After it rains, make sure that you don't see any remaining granules poking up through the grass or sitting on top of it.

Can I apply GrubEx and fertilizer at the same time?

According to the Scotts website, only straight fertilizer, with no other ingredients such as pre-emergent herbicides or other pesticides, may be applied at the same time as GrubEx. The site gives no recommendation for mixing straight fertilizer and GrubEx, so it may be wisest to apply one product at a time.

Can you apply GrubEx to a wet lawn?

You can wait for a good rain heading your way, and apply the grub control before the rain. That's your only option if you have a lawn too big to water. The chemical in some grub controls will break down in hot, dry weather. So if you leave the chemical on your lawn and not watered in, it won't be effective.May 25, 2018

Do grubs come back every year?

All lawns, everywhere, have some grubs every year. Newly hatched grubs are big eaters! Grubs eat the most in the Fall and progressively less as they mature in the Spring. In fact, when grubs are nearly ready to change into beetles, they stop eating.

What are signs of grubs in lawn?

Signs of Grubs in LawnGrass with damaged roots will begin to thin, yellow, and die.Irregular patches of brown grass will appear in random places in your lawn.Grass will feel very spongy and will pull up very easily. ... Grass will be very vulnerable to drought and other stressors.More items...

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.May 22, 2020

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 to prevent grubs from destroying my lawn?

Proper fertilization is important to prevent and allow the lawn to recover from grub damage. Mow lawns immediately before applying an insecticide for grubs to remove weed flowers and protect bees. Make a regular practice of mowing your yard with the mower on the highest setting (3.5-4 inches).

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 to apply chlorantraniliprole?

The preventive compound chlorantraniliprole should ideally be applied in April or May to control grubs that would be damaging turf in the fall as it will take longer for the material to move to where the grubs will be feeding in July. To kill grubs in the spring or fall, use carbaryl or trichlorfon.

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.

Can fertilizer be mixed with water?

Some of these products come in a granular formulation that is applied with a fertilizer spreader or some products are designed to be mixed with water and sprayed. Also, in the last two years several products have become available in an attach-to-hose bottle and are automatically mixed with water when applied.

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 to treat grubs in the fall?

The Answer. When you notice grub infestation in the fall, it’s best to treat during fall. This helps to significantly minimize damage to your lawns. However, not sticking to proper timing (such as treating for grubs in spring) won’t achieve any results. You’ll have to repeat such treatment in spring.

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 do I get rid of grubs?

Grub control involves several things. First, you’ll need to identify the grub problem from physical signs. Identifying an ongoing infestation normally calls for immediate action. However, timing is very crucial to grub control.

What is a nematode?

Nematodes are tiny (microscopic) worms considered environmentally friendly and effective grub predators. When applied to your lawn, they immediately begin the treatment process by feeding on grubs. This isn’t as effective when applied at any other time outside of the fall season.

How to tell if grass has grubs?

To further confirm grub presence, you may have to tug at certain sections of your lawn grass. If there are signs of slight movement, lifting or pulling the grass out will reveal grubs.

When do grubs attack lawns?

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

Understanding the Grub Lifecycle

Because beetles emerge in summer and stay alive for several months, grub control is appropriate at many different times during the year. Summer and fall applications handle smaller, younger grubs before they spend months gnawing away at your yard’s root system.

Timing Spring Grub Treatments

Spring can make homeowners antsy to get started on outdoor tasks, but performing some of them too early can impede their effectiveness. Grub treatments, for instance, should be held off until grubs have returned to the top inch or so of soil. Before that time, you may have trouble reaching the problem effectively.

Combining Fertilization and Weed Control With Grub Treatments

Do you know how healthy your yard is? Do you have the knowledge to gauge how much damage has been done? If you’ve waited until spring to head off a grub problem, your grass may struggle to handle pesticide applications. Pre-treating with fertilizer or combining the application with a fertilizer may be necessary in order to keep your lawn healthy.

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.

When is the best time to control grubs?

Preventative measures are usually best applied during spring and summer. Spring because, at this time, overwintering grubs are just beginning to come out. 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, ...

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.

When do grub worms lay eggs?

Life cycle Of Grub Worms. Female beetles normally lay their eggs during summer. The grubs go on to hatch around late summer and feed on turf roots from this time till winter. During winter, they burrow deep into the soil to overcome the harsh weather, and when spring arrives, they go on to begin feeding again.

Why is summer so important?

This, of course, is because summer comes with its fair share of lawn troubles. Grubs for one are usually significantly higher during summer. And if they aren’t tackled on time, they could leave your lawn looking like a blast from the past.

How long does it take for insecticides to work?

Most times, the time span indicated on the manufacturers’ label doesn’t always apply. Times, it could take as much as three to four weeks to begin noticing results. Finally, remember that watering these insecticides immediately they are applied, is germane to getting positive results. #4. Pesticide Treatment.

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.

What is a grub?

The Grub Problem. A grub is what the larva of various insects is called, especially beetles. So just as butterflies and moths have larval forms known as "caterpillars," the Japanese beetle, for example, has a grub as a larval form (because they curl up, grubs appear to have C-shaped bodies).

What is a grub in a lawn?

Their grub is 1 1/4-inches long, white, with a reddish-brown head. Having grubs in your lawn is problematic on three scores: The grubs, themselves do damage, eating grassroots, thereby damaging the grass. If you spot large dead patches of grass in your lawn, grubs could be the cause.

How do grubs affect lawns?

Having grubs in your lawn is problematic on three scores: 1 The grubs, themselves do damage, eating grassroots, thereby damaging the grass. If you spot large dead patches of grass in your lawn, grubs could be the cause. 2 If they are Japanese beetle grubs, once they mature into adult beetles, they may eat the leaves on several of the plants that you are landscaping with, including rose bushes and Japanese maple trees. 3 Likewise, adult June bugs eat the leaves of landscape plants, such as oak trees. They also damage grass blades. 4 Moles eat grubs, so having grubs in your lawn is an open invitation to moles to come on in and set up shop. Thus grub control is a central pillar in mole control, too. Another pest that eats grubs (and that you may, therefore, be attracting to your yard if you allow grubs to flourish in your lawn) is the skunk.

How do June bugs get their name?

It gets its name from the fact that it crawls out of the ground around the month of June in many areas. June bugs (also called "June beetles") are a bit bigger than Japanese beetles and are reddish-brown. Their grub is 1 1/4-inches long, white, with a reddish-brown head.

What is the color of Japanese beetles?

Its grub is about 1 inch long, white, with a brownish-orange head. The grub of the June bug ( Phyllophaga spp .) is also commonly found in lawns.

How do I know if my lawn is infested with grubs?

One sign that your lawn is infested with them is provided by skunks. These pests will dig down through the grass to access grubs. If you spot holes in your lawn and cannot account for their presence in any other way, skunks (and, therefore, indirectly, grubs) may be the culprit.

Can you use insecticide on new grass?

In general, most insecticides will not harm new grass, given that their chemistry is designed to target insects and not plants (herbicides would be another matter). New grass, though, should be treated carefully to ensure proper establishment, and some maintenance practices that will be needed for the proper establishment ...

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 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 animals dig up my yard?

Raccoons, skunks, or moles are digging up your yard. These animals all love to dine 
. on large, mature grubs. You can pull back the dead patches on your lawn like pieces of loose carpet. This happens 
. because grubs eat the roots holding the turf firmly in place on the soil.

Why does my lawn feel spongy?

because grubs eat the roots holding the turf firmly in place on the soil. Before the dead patches even appear, your lawn feels spongy when stepped on, as it it were 
. freshly laid sod. To check if you have a grub problem, peel back a square foot of green turf in several areas of your lawn.

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