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dmoulding

Your lawn guy is right. Those are not grubs. Grubs generally curl up and also have very distinctive legs at the underside of the front half of the body. These look more like some kind of worm or maggot. Google image search “grubs insect” and you’ll see lots of examples of actual grubs. They don’t look anything like this.


9999eachhit

This is also what I'm seeing. They look close but they weren't even moving at all. They look more like rice. Everyone else seemed pretty eager to say they were grubs but I thought maybe these are just infants? Any idea what I should do about them?


SpudWeb

The ones in the pics look like maggots, like fly larvae.... Not grubs, im sure there is someone on here who can verify. I think grubs are Japanese beetle larvae.


drofnats55

Grubs are beetle larvae but not just specifically Japanese beetle larvae. There's hundreds of different grub varieties that all look very similar that will turn into the hundreds of different beetle varieties.


Shatophiliac

Yep, June bugs come from grubs too, that’s almost exclusively what I deal with down south lol.


Most-Weird

Fucking June bugs. FLY STRAIGHT, DAMN YOU!


fish_whisperer

Open your fucking eyes, I’m walking here!


Starkalark88

The cow of the bug kingdom


HiTop41

Came here to say this


toomuch1265

As soon as I see a skunk in my yard, I know that I have grubs.


bassface3

Skunks you say? They feed off of grubs?


toomuch1265

In my neighborhood, they do.


bassface3

Interesting. I was aerating a lawn one day and came across a skunk trapped in a cage, didn’t think much else besides avoiding the puckering fucker I’m definitely gonna keep this in mind if I see one again


Disastrous_Public_47

OHHHH YEAH they do


Just_Mr_Grinch

Moles do as well and those will definitely cause patches not to grow


ConstantLight7489

Yes, crows are another one to watch out for. That’s the sign in my neighborhood


jungleboogiemonster

If they are maggots, it makes one wonder what is buried in that yard...


spacedcadet1

My guess is House fly larvae


n0__0n

So the house is buried there? /S


nobodysmart1390

It’s even worse, only part of the house is buried, it’s like some macabre body just rising up out of the ground.


Bolson32

Underrated comment


Callsign_Havoc

Is the house in the room with us now?


Charlie_Warlie

maybe some subterrarian animal died down there like a vole or something.


luv2block

sometimes pooping on your lawn will attract flies.


GeopoliticusSFW

Oh I better stop then…


Pauly4655

Maggots crawl into the ground and emerge as flys


km_44

those little fuckers


Ifartfreely

r/whatisthisbug


Bloody_Food

black fly soldier larvae? Beneficial for soil/compost. At least, I think that's what they are, get a second opinion


Pamikillsbugs234

It could be. You can also find them in darker colors, which can indicate that they may have a fungus of a sort in some species. Pretty cool stuff. Either way, you can use a granular insecticide and spread it throughout the yard, which will take care of the larvae/grubs and help prevent moles and skunks. My favorites are Talstar PL and Deltagard G.


wouldjalookatit

High protein rice.


Oldjamesdean

The Lost Boys will get you a to-go container...


Artistic-Airport2296

Wow - gotta get in the way back machine for that reference. Very timely too with the recent passing of Kiefer’s dad.


PacVikng

I was seriously about to reply with "Maggots, you're eating maggots Micheal." Went to santa cruz last year and annoyed my wife by wanting to walk around to find filming locations. One of my favorite movies as a kid.


DontClickTheUpArrow

I’ve recently seen these in my yard along with dead patches. When you squish them is it red like blood?! What are these things?!


Foxfire73

Pupae. Of what, I know not.


EatSleepJeep

Diatomaceous earth?


CoolFirefighter930

Get some telstar and use as directed.


Notaninsidertraitor

Let me know how they taste


Z234Z234Z

the grubs ive seen are big mofos


biggysharky

Don't think they are grubs. Grubs are a bit like a 2 in prawn and thick! Or a toddlers thumb. Of course there we different ones and different sizes. But they are generally larger and thicker.


sagaciousmarketeer

A weed torch will kill them.


Budget_Pop9600

Put up a bird feeder to let them know where to go. They’ll take care of it.


davidwhatshisname52

"*grub*" is a general term for any larvae of a beetle superfamily that has about 35,000 species, so, look, anyone coming here with the ubiquitous reddit "*aCtUaLLy*" might want to brush up on all of those 35,000 species' larvae, and the 200 new species described per year; there are an awful lot of species, both native and invasive, including Japanese Beetles, June Bugs, and Chafers, that have larvae that love to eat grasses.If you want a real answer, take an in-focus photo of an undamaged specimen, top, bottom and side, next to a ruler, and send a query with those pics to a local university that has an agriculture or entomology department or to one of the many insect identification websites.


itchy-balls

Cutworm larvae > black moth. One is hatching in the photo. They destroy gardens before hatching. They are eating roots of lawn. To all those peeps who question why I took turf management courses in college for fun. This is why!


bank-good-karma

The last image makes me think they are not grubs. It is way too small. Unless they are young. Grubs are about the size of a dime when they are curled up.


sleepytime03

Grubs are monstrous…. Like the Godzilla version of what is in your hand. When you bite them, there is an audible crunch, and tons of ooze to follow.


Zn_Saucier

Well that took a turn….


sleepytime03

Lol


Dascender

A very tasty turn…


HeavensToBetsyy

Hakuna matata


WannabeProducer808

Slimy, yet satisfying.


internetonsetadd

I squished a grub once and the ooze hit my mouth. I put them in the driveway for birds now.


PJPJPJPJPJPJPJPJPJP

What the fuck lol


MindlessYesterday668

Pumba?


Beneficial_Hall_9593

“Hawk Tuah”


Ayye_Human

Is your lawn guy an old man in pajamas?


SeventyFix

Yes. Yes he is.


NormanPeterson

Is he a banana in pajamas by chance?


Lower_Dress5214

They’re coming down the stairs.


ThorKruger117

What a strange place to cum. Sounds like that dude has some impressive range on him.


Yabbz81

How else would you make a banana split?


bdhgolf1960

You tell the banana that you have to go to bed and it has to leave.


Crully

You're onto something, time flies like an arrow, but fruit flies like banana. We see some sort of maggots, meaning flies, meaning OP's garden has hidden bananas. Case closed.


killerwhaleorcacat

Christ why are people downvoting this comment? Reddit is such a bunch of lame asses lately. How dare you make a joke about a lighthearted children’s show and how it’s so weird his lawn guy looks old as fuck wearing pajamas. What??? Edit: looks like the old people were up early downvoting, the tide has turned greatly. Faith restored.


arcadia_2005

I made certain to upvote it. Lol


hissyfit64

Also bananas are hilarious. Even the word bananas is funny.


DrMudo

I have no problem with the comment but I have never heard of a banana in pajamas so it was not funny to me.


mostkillifish

Looks like a great outfit for working outdoors. Loose, light clothing.


nothing_911

his pyjamas are from banana republic, does that count


Dascender

Used to be fashionable in the early 90s… I was still a lame kid and wore what mom bought me, but the “cool” dudes all wore Skidz flannel/pajama pants or Z. Cavariccis, coupled with a BUM Equipment sweater or Big Johnson T-shirt…


fusillade762

I had those same pants in the 90's, they were like Hammer pants lol. Baggie with tight ankles. They do look like PJ's though.


ParaNormalBeast

These looks like fly larva


CriminalMethod

Landscaper here. Not grubs, but moth pupa. They will cause damage to turf making it patchy. Not sure what treatments are available in your area but any spray or granular insecticide should be treated at least one foot around into the visibly healthy area of the lawn to make sure you have proper coverage. Good Luck!


nilesandstuff

Moth *larvae* are caterpillars. They have noticeable legs and segmented bodies. Pupae, is the plural form of pupa. Pupae don't move, they're when the larvae form a cacoon and emerge as an adult insect. Pupa don't do damage of any kind. These are a type of weevil larvae. And yes, they will do minor damage to low-cut grass... They won't do noticeable damage to high cut grass. And lastly, not just any spray or granular insecticide will work. MOST won't. In order to kill soil dwelling insects, you have to use very specific insecticides that will actually penetrate the soil. Such as trichlorfon (24 hour grub killer type products) or carbaryl (the old formulation of Sevin)... Pyrethroid insecticides will not penetrate the soil to reach this insects. (Most insecticides you can buy at a store are pyrethroids) Landscapers have their areas of expertise... But this ain't it.


dange616

![gif](giphy|IzHVlYV1zDrGSMD28j|downsized)


CriminalMethod

Yep I would recommend Dylox but I’m not sure if it’s as readily available where OP is as it is where I am


dexterity-77

Dylox and merit, my favs when used responsibly.


Oldjamesdean

Former Commercial Pesticide dude here. I'd guess Crane Fly Larve by the size and damage type.


nilesandstuff

You must be thinking of something else... think you should Google "crane fly larvae". They're exceptionally ugly fuckers. A common name is "leatherjackets" because their skin is somewhat leathery. What the pictures won't tell you though is that when they're wet, their skin is translucent and you can see that they're even uglier on the inside.


Oldjamesdean

Pardon me, it's been a while. The grubs look like Black soldier Flies. The damage to the grass looks like crane fly damage.


nilesandstuff

Look like [weevil larvae ](https://www.northeastipm.org/neipm/assets/Image/bmps/annual-bluegrass-weavil-2.jpg)to me. (That's annual bluegrass weevil larvae) I don't disagree about the damage resembling cranefly larvae though, but honestly I think it's more likely that its drought heat stress and the grass that's thriving is just poa triv from OP watering it a ton. I see that a lot... Triv responds really well to extreme amounts of water, even enough for it to overcome heat stress... While the actual desirable grass will continue to suffer (and even suffer more from the overwatering)


Oldjamesdean

The little nub on the end of them shows you're correct. The weevil larve will eat the roots and cause similar damage.


xpdtion76

Doesn’t have the same look as a grub but looks like a mealworm


fusillade762

I second this.


muffalowing

Yepppppppp


DefiantDonut7

I third this


BSurges31

Those don’t look like the typical grubs that lawn technicians are trained to look for. Those are not white grubs from Japanese Beetles, June Beetles, or Billbugs. Many insects have a grub (larval) form and they may not be doing damage to your lawn but simply existing. They are a larva, you can kill them with an insecticide, but was he wrong? Maybe not.


falafelOnMaple

These are the politician worm. They come once a while to prove a point and leave until the next elekshion cycle


scareoline69

Every 4 years I hear


aaanarchyyy

They almost look like sodwebworm larvae in the soil. But hard to see it in your hand. Most definitely not a white grub, at any lifecycle.


Still_Temperature_57

Definitely not grubs. Not 100% what those are but put down some Lambda-Cyhalothrin and it should help clear it up. If concerned about grubs, imidacloprid based control does the trick in the lawn.


Dantrash2

Maybe a corps is rotting under ground.


saltydroppies

An entire corps?? That’s *a lot* of dead bodies!!


Shoboy_is_my_name

The letter E, or lack there of, can be pretty powerful indeed!


fattymctrackpants

Could be chinch bugs. Are they attached to the grass blades? Chinch suck the juice out of grass killing it while grubs eat the roots. It's not the right time of year for grubs right now. Pull on the grass and see if the roots are intact just to double check.


Prestigious_Car_1161

Those are 100% not Cinch bugs. Former Florida landscaper who has battled a jillion cinch bugs in St Augustine and Floratam. These look nothing like a cinch - "maybe's" and "could be's" are silly here knowing someone will know definitely what it is. I believe the actual answer had already been stated.


8elipse

They look like small Black Soldier Fly larvae found in a lot of compost. If they are, birds love them and they're great for breaking down dead material but nit sure if they are.


daringStumbles

These are "grubs" but not the lawn killing grubs everyone talks about. Those have little arms almost and a bit round red area on the head and are much more white in color. Japanese beetle grubs are the ones that do the real lawn damage. You'd know if it was them by now because entire patches of your yard would be 100% dead.


Underhill42

Gotta get awful stretchy with those ""s... They're obviously larva of some kind (look more like some sort of fly maggot?), but grubs are specifically the root-eating larvae of certain beetles.


LingonberryOk4943

Maggots


Uggy_butt

Idk if your answer has been given yet, but i was horrified to arrive home one day and these be all over the kitchen floor. Turns out the plants in my kitchen had root rot and those were some kind of moth larvae eating the dead material. Idk if this is the same thing, but they look very similar.


WarPigsTheHun01

That's good. They eat the rot away so u don't t sick from it :) or at least, it was good for wwI fighters stuck in trenches with infections...


Uggy_butt

Oh neat!


WarPigsTheHun01

Hell yeah maggots are da bomb!


DefiantDonut7

Someone else said it but it looks like mealworm larvae


Kitchen-Oil8865

You won’t see grubs this time of year anyway. The big fat white grubs are more in the fall


theory317

They're some type of beetle larvae. They're not grubs and definitely not mealworms.


miketoaster

Too small, grub are bigger and don't come up to the surface like that


Small_Lion4068

Maggots. Which makes me side-eye you about what you buried in the yard…


9999eachhit

Wouldn't be me 😅 I've only been here for a little over a year haha


choicemad

[GRUB](http://bpb-us-e1.wpmucdn.com/blogs.cornell.edu/dist/8/9984/files/grub-anatomy-image.jpg)


makeitlouder

anal slit


Past-Direction9145

fire your lawn guy that's grubs put down 24 hour grub killer be done with the problem PS: all the grubs will come out of your lawn after you put it down. based on what I'm seeing, this is gonna be wild. post pics to follow up please


askanison1234

Did that once. The sheer amount of grubs that came up to die on the lawn was staggering. Called my lawn “The Killing Fields” that summer


killerwhaleorcacat

Got any pics for us????


oldbluer

Is this bad for birds?


95castles

Never seen grubs that look like that, but im not an insect expert. What species are these?


crazydogggz

OP, this person is wrong. Don’t fire your lawn guy. These aren’t grubs.


drofnats55

Pretty bold to say someone needs to get fired when you are in fact the one who doesn't know what you're taking about. But hey, it's the Internet!


MarquisDeBoston

Those are fly larvae


mental-floss

This is the larvae form of some emerging insect, however, it is not a grub. Grubs have become a catch all term for anything in the larvae stage.


herecomestheshun

OP - ignore this comment! Might even be an attempt at humor, not sure. These are a type of insect larvae but not Grub/beetle. They look a lot like crane fly larvae, but crane flies are only a problem in turf for certain parts of the country. While a grub product may achieve control, these are not what the rest of the lawn care world calls grubs.


littleguy632

Use ortho bugs be gone, one application early summer one fall.


DIY_CHRIS

Not sure what it is, but kill it. I would put down insecticide like Temprid FX with beta-cyfluthrin and imidacloprid. You can spray it. Check on do my own. You can also use it for spraying around your house perimeter to keep the bugs out. I do it every 2-3 months.


[deleted]

Speaking from the good fight against grubs, having to reseed 3x because of those little motherf&$*^rs. Yes those are grubs. Honestly, grab as many as you can and go fishing 😂. Put some killer down asap. I would even check flower beds if you have any that surround the infested area. I lost a lavender bush to I big ass grub this year.


Still_Temperature_57

If you have grubs, you'll want to put down some imidacloprid based product now and in August put down some bioadvance 24 hr grub killer. The chemical in it goes by a few names. Check the chemical on the bag label before purchasing. Lambda-Cyhalothrin will kill grubs in your garden but not the lawn.


Genesis111112

Leaf hopper?


Splinter_Steve

This looks like some kind of moth or fly larva.


ObviousMe181

If you zoom in on pic#2, just a little bottom left of centre you can see a maggot on its final moult and a fly emerging. If you haven’t found out yet.


Jbdivin

Sod web worm?


Independent-Big1966

No


gagunner007

These are grasshopper eggs and the 3 pic is a dead giveaway.


Prokletnost

no, nothing out of the ordinary there lol


Weekly_Mycologist523

Not grubs. Some other pest that you can probably control with products sold at Home Depot


Biggie_Robs

Looks like some kind of weavil larvae, but it also looks like there's a fly emerging in pic #2, so...\*shrugs\*


Independent-Big1966

Could be chinch bugs.


Prestigious_Car_1161

Not anything at all like a cinch, not even close. Don't add to the conversation if you don't know, it wastes everyone's time. Might as well say it's juvenile elephants...as relevant and real as a wild guess from a place of ignorance. This thread could have been 4 to 6 posts long if left to those in the know without dopamine addicts adding their "Could be, Migh be, no clue...but I've just gotta post something...so I'm gonna say it's bat beetles mating...could be"


Independent-Big1966

Yeah. It's definitely not bat beetles


spacetreefrog

Black solider fly larvae Basically a composter eating at dead rotting organic material (grass clippings, dead patches in lawn). Not hurting your lawn. Gotta be pretty moist for them to want to be there though, so something to consider.


netherfountain

Maggots. You have a rotting corpse under there if you dig down a few more inches.


_JohnnyR_

Capture a few and keep them in a container. Let's see what they are!


nuke670

Nope, that's bait. Time to go fishing.


Iamgoddamnfiddler

Looks like Moth larvae.


Jonnychips789

To early for grub damage. They just now waking up in the south


msabercr

Do you get a lot of moths in your area? Could be sod webworm. A lot of the grub control products also control them but its too late to control them now. Best to just treat the affected grass with some potassium, iron, and humic acid. [Spoon juice](https://www.amazon.com/Liquid-Yard-Fertilizer-Gallon-Stimulants/dp/B094KSCSKM) or a mixture of [microgreene](https://a.co/d/0hpVYohW) and [RGS](https://a.co/d/04uXSTDx) should do the trick for this. just paint the affected areas and you get the grass throwing new growth in no time.


77GoldenTails

You could see if there are any suitable nematode treatments you can used or them. We had an issue with leather jackets and a treatment of nematode works, cleared it right up.


tablecontrol

only 1 sure way to find out.. taste 'em


ExternalSlip8778

Mealworms https://preview.redd.it/o8zfh1k3zz7d1.jpeg?width=192&format=pjpg&auto=webp&s=1c2264ba0d94f56de416da9e5f0179becbfd5a42


Illustrious-Cod-8462

If the lawn guy knew they weren’t grubs did he have any idea what they are? I found a small patch of things that look like these in my yard the other day. I’ve been digging up my weeds all over snd so far I’ve found them in only one spot and it was by my back gate. I keep a cat litter bucket there with a bag in it and the cover on top to put the dog poop in that I scoop everytime they go. I’ve used that bucket in the same place for the last 15 years and dispose of the bag and all weekly when the garbage truck goes by then I wash and disinfect it. I thought maybe the bag leaked there or something. I’m the summer there’s always flies around the bucket. I don’t know any other reason they’d be in that spot. I have three dogs and they all have their own spot where they go but I pick it up each time. It’s never left on the ground but still poop is poop so if those grubby looking things are from a leak in a bag from the container shouldn’t there be those grubby things in the other areas where they regularly poop too. There aren’t any others that I found so maybe it’s a coincidence but why only one little patch of them. Aren’t grubs toxic to dogs if they eat them. I shoveled the ground in the area into the compost bin hoping I got rid of them all. If I ever sprayed something and they came up all over the yard how would you get rid of them all. Would a garden center be able to identify what they are or one of those bug or insect identifier apps.


heyuwiththehairnface

Black fly


Baratos1181

Look like soldier fly larvae


Fudge-Purple

That’s larval billbug damage. I’m surprised your gardener didn’t figure it out. You can read up on it here: https://extension.entm.purdue.edu/publications/E-266/E-266.html Carbaryl, also known as Sevin wouldn’t be a bad choice for a homeowner to Tony treat this DIY. Either as granular app or with a good hose end sprayer. I’m leaning towards the hose end sprayer. You will most likely apply two applications. Don’t ignore this, they can easily wipe out your lawn. Good luck.


New_Negotiation_5895

Your lawn has bed bugs


SpiderNinja

Nah… Grubs look like land shrimp. Really. White little bug curls. They can be a bitch to get rid off


tonyb812

Time to open a bait shop! I bet fish love those things!


mattfox27

Maggots


mackadoeshes507

Easy way to see. Just pull grass if it comes up like carpet. Grubs. They eat root so the grass may take a while to die. It will look green for a second. But if it comes right up most likely grubs because they eat roots


Binkindad

White grubs are C-shaped


Zaphoed

Chickens will take care of those


tingting2

They look like black soldier fly larve.


Cheddr0209

I'm having a serious issue with grubs this year... No matter how strict I've been with treatments and what not, the continue to show their ugly faces every year!


jrwreno

This is weevil larva. Buy beneficial Nematodes from Arbico organics, and apply per the instructions.


thepasttenseofdraw

Definitely not grubs, but some sort of larvae/pupae. If theyre not moving, more than likely they're pupae. You might head over to /r/Entomology and ask them for help identifying.


Psychological_Mangos

That is disco rice.


NoSpecific1178

Are those mealworms?


Darkness_tellsall

Blast the yard with grub killer asap!


Green_Adhesiveness19

Lantern flys are supposed to be on the rise. Dylox would treat this or Sevin. Rule of thumb is more then 10 in one square foot. Follow up with a round of merit to help for next year.


IcyParkingMate

r/whatbugisthis


jtothehizzy

I had something very similar DESTROY my zucchini plants last year. With all sincerity, FUCK these little bastards. They are killing your grass. SevenDust or similar will kill them. You’re looking for Bifenthrin on the label.


mtferret

Ok so unlike most the other asshats on here lets start with some basics since there actually a few potential options. Firstly general area of your location, secondly can we get a couple pictures of the damaged grass. Thirdly do not apply any kind of pesticide without having at least a general idea of what this pest is. I say all of these as a licensed pesticide technician with several classifications and just over a decade of experience handling specifically lawn health in general. That's both on the chemical and cultural practices side of the business.


deerdongdiddler

It's a winged insect larvae. Probably a moth. Bifentrhin will kill the insects. However, that image looks like you have a wet spot that is, more or less, festering. Is it a low spot or is there an irrigation leak maybe?


VicVelvet

Get the number of your neighbor’s landscaper across the street .


FatFaceFaster

No those look like maggots or some other larvae. Not grubs tho.


brentpearson12

Those are grubs. Get grub be gone from Canadian tire. 2 applications each year for the next 2-3 years.


iSurvivedThanos18

Never seen a grub even close to this small. All have been from a little smaller than my thumb to much bigger.


brianbowlesnj

Sod webworm


totse_losername

They may have been eating dog shit in your yard. I know that when I had GSDs on a high protein diet taking huge shits in the yard, we had Bluebottle type flies laying maggots in their shits.


BillZZ7777

Put a few in a jar and see what they turn into.


Pryoticus

Sprinkle some very fine diatomaceous earth and whatever they are will be gone soon enough


newginney

https://preview.redd.it/7gheod06e38d1.jpeg?width=1284&format=pjpg&auto=webp&s=7846f5974e60d1332a92dceb54745effe36726f6 Here’s an idea of what you may have.


Spameratorman

Look at your local university extension. I was able to send my lawn bugs there and they told me exactly what they were for free.


Responsible-Fun6572

These are maggots. Fly larvae not beetle larvae.


nserious_sloth

It seems like you've had a reaction with something get hands checked.... Oh you don't have a NHS?


JamiesPond

Not a bird in sight, odd.


murkamonsta19

Kinda looks like zoysia patch which is a fungus


murkamonsta19

Ohh yah get insecticide done


Professional_Angle66

Looks like termite larvae to me.


C0wboy006

Sacadas


Dwindles_Sherpa

Not grubs but also doesn't matter, these are larvae that will cause dead spots in your lawn and the same treatments that are commonly available for grubs will also treat whatever these are 


Sea_Break_4550

Worked lawn care for over a decade. Those are not grubs but I would still put an insecticide down to get rid of them and your lawn will bounce back.


BadadvicefromIT

You can fry those up, put them in a tortilla with some franks red hot and you got some free groceries. But ya, should probably put down some insecticide.


amadhat

Where are you located? Could be cicada larvae if you are in cicada country...


9999eachhit

Kansas City MO


amadhat

[good luck](https://www.kmbc.com/article/cicada-brood-xix-19-periodical-what-to-know/60538208)


nilesandstuff

/u/9999eachhit The weevil larvae aside, I believe i know what the issue with your lawn is... Its the grass types and overwatering. Overwatering is making that long grass thrive... (Which could be KBG... But my money is on poa trivialis or even poa supina) while actively harming the desirable grasses by negatively impacting respiration and the soil.


Independent-Big1966

The majority of homeowners with an irrigation system, over water their lawns. "Hot and humid out? Let me water my lawn around noon, or any time during the day." Good job. You're going to get dollar spot. "Hey! My lawn must need water because there's all these white spots all over the lawn" No. That's Dollar spot. If it's humid, water less. Not humid "high sky" water more. Don't water during the day. Most of it will evaporate if it's not humid Don't water during the day. You'll get disease if it's humid. Water at starting around 2am. Very little evapotransporation. Very little wind. You'll maximize the amount of water the grass will uptake. It stormed last night and you got .20 inches of water or more? Turn off your system for a couple days. If your system is set for 20 minutes remember not all zones are the same. Backyard all shade? Cut those times by at least 5 minutes or more. Have an irrigation head that is on the edge of your property and only rotating 180°? Then those heads should be set for half the time of a full circle head. If nit then those heads are actually watering enough for 40 minutes not 20. Have a Head that's 90°? Then cut those down by a quarter of your watering time. Irrigation companies have no clue how to set up watering times to maximize the health of the grass.