Will GrubEx kill active grubs
Ava Robinson
Updated on April 17, 2026
Disclaimer: GrubEx will not kill every grub. Some grubs are naturally more resistant to the product.
Does GrubEx kill live grubs?
Munching on grass roots, grubs live underground as the larval stages of insects such as beetles and moths. The active ingredient in GrubEx pesticide, chlorantraniliprole, mitigates grub damage by killing the emerging larvae and breaking the life cycle of these insects.
Is it too late to put grub killer down?
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.
How do I get rid of active grubs in my lawn?
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.How long do grubs stay grubs?
As the soil cools in the fall, the insects begin to move deeper into the soil and over-winter below the frost line. In spring as the soil warms, the small grubs will emerge from dormancy and begin feeding. Grubs will feed for up to six months and will obtain their full size by the end of summer.
Which is better GrubEx or Bayer?
Both are excellent products and very effective at killing a wide range of common grubs that may be living on your soil. Scotts GrubEx is a contact and prevention insecticide, while the Bayer Grub Killer Plus eliminates Grubs on contact within 24 hours. And they are sold in ready-to-use granular bags.
Can you apply too much GrubEx?
Applying too much can hurt the environment and using too little may not control the grubs in your lawn. Although Dylox claims it kills grubs within one to three days if applied properly, you may still notice grub activity within that time or shortly after.
When Should I spray my lawn for grubs?
Treating tips when spraying for lawn grubs: Always spray in the late afternoon/evenings (Kill bugs at night, and weeds in the morning) Spray a second time 7-10 days later to break the lifecycle. Don’t spray if rain is likely as you will only need to reapply. Always read the label and follow label rates for application.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.
Does TruGreen treat for grubs?Well, a grub worm is simply the immature larva of a beetle. … TruGreen® has the expertise and experience to help protect your lawn from grub worms and other lawn-damaging insects. If you’ve noticed signs of insect activity or just aren’t sure, contact TruGreen® today by visiting TruGreen.com or calling (866) 688-6722.
Article first time published onCan I apply GrubEx twice a year?
Grub killers may be applied up to three times per year, depending on the pesticide and the manufacturer’s instructions.
Should I apply GrubEx before rain?
A very important tip is to water the grub control in within a few days. You can wait for a good rain heading your way, and apply the grub control before the rain. … 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.
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.
How many grubs per square foot is an infestation?
Peel up a one square-foot section of grass and soil from that cut. If there is significant grub damage, the grass should peel up quite easily. Sift around in the soil, simply counting how many grubs you find. If you count 10 or more grubs per square foot, you have a serious infestation.
Are grubs active at night?
May/June beetle larvae. They are most active at night and, unlike other scarab beetles, do not feed on plants as adults. Japanese beetle adults are slightly smaller, only 3/8 inches in length, with a dark metallic green head and coppery-brown body. …
What temperature do grubs become active?
White grubs move upward when the soil temperature around them reaches at least 50 degrees Fahrenheit. Although we had soil temperatures at 4- and 8-inch depths of at least 50 degrees in April, it must not have warmed deeply enough to trigger grub movement.
Will GrubEx burn grass?
Prevent grubs from damaging your lawn with Scotts GrubEx1 Season Long Grub Killer. It kills 25% more grub types vs. original GrubEx. … Grubs and other listed insects can cause extensive damage to lawns by feeding on grass and its roots.
How long does it take for grub control to work?
It will take 10-14 days for the grubs to begin to die after the insecticide is applied. One trichlorfon product called ‘Bayer Advanced 24 Hour Grub Control’ seems to indicate by the name that it will kill grubs in 24 hours.
What are signs of grubs in lawn?
- Grass 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.
What's the active ingredient in GrubEx?
Active IngredientChlorantraniliprole – 0.08%Target pestsInsects such as White grubs (including larvae of certain types), Caterpillars, Annual bluegrass weevils, Billbug grubs, Crane fly larvae, Chinchbugs * See label for complete list
Is GrubEx a killer or preventer?
GrubEx works as a preventative by preventing eggs from maturing and hatching, so you want to apply it late in the spring and be sure it is present in the soil through mid-summer. One application can last for about four months.
How much is a bag of GrubEx?
List Price:$52.99 DetailsYou Save:$12.63 (24%)
Why did my lawn get grubs?
The grubs get their start when the adult beetles lay eggs in your turf, usually in spring. After the eggs hatch, the grubs evolve in three stages, with grub damage greatest in late summer, when you will see areas of your lawn thinning and yellowing. Later, irregular brown patches appear in your turf.
How long does it take for a lawn to recover from grubs?
Lightly water the seeded area every day— or more often if the ground feels dry—until the grass is a couple inches tall. This should take two to three weeks.
Do grubs eat new grass seed?
Grub-killers won’t stop grass seed from germinating. They won’t do a very good job of killing grubs either this time of year.
Which examples below are signs of a grub infestation?
Early symptoms of a White Grub infestation include the gradual thinning, yellowing and wilting of grass. Scattered, irregular or dead patches can also occur. Infested grass typically feels spongy underfoot as it’s not well-anchored to the soil due to the grubs feeding on the roots.
What is the best grub control?
- BEST OVERALL: BioAdvanced Granules 700745S 24 Hour Grub Killer.
- BEST BANG FOR THE BUCK: Scotts GrubEX1 Grub Killer for Lawns.
- BEST PREVENTATIVE: St. …
- BEST READY-TO-SPRAY: BIOADVANCED 700280B Complete Insect Killer.
- BEST FAST-ACTING: Ortho BugClear Lawn Insect Killer.
How much does grub control cost?
First, you must apply a corrective grub control treatment, that will quickly stop the grubs from continuing to damage the lawn. The cost to treat the entire lawn with a corrective material is more costly than the preventative treatment. You’d be looking at approximately $100-$125.
Can I put down fertilizer and GrubEx 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. … Fertilizers mixed with other products such as crabgrass control may be applied two weeks before or two weeks after using GrubEx.
How often should you apply grub control?
Grub control measures need to be taken on annual basis to work consistently. Skipping a year may be fine, but if any beetles have laid their eggs in your lawn’s soil over the course of that last year, you can be looking at a seriously damaged lawn by mid-fall.
Can you apply insecticide to wet grass?
Can you spray pesticides in the rain? The answer is not cut and dry. Sure, the inside can be sprayed, that’s a given. However, spraying the yard and the perimeter of your home in the rain can be ineffective.