Table of Contents
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.
What month do you treat for grubs?
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.
How often should you treat lawn for grubs?
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.
Is it 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.
Is it too late for grub control?
Preventative grub control is usually done between June 1 and July 15 with one or two applications of an insecticide containing imidicloprid. If you missed this application, you may start seeing damage from grub larvae. Unfortunately, it’s too late to get control with imidicloprid products.
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 causes lawn grubs?
Lawn grubs hatch from eggs that have been laid by scarab beetles just under the surface of your lawn. Once they have hatched, they feast on lawn roots and turn into pupae and re-emerge as scarab beetles. These beetles then feed on other foliage and relay eggs under the lawn, restarting the cycle.
When should you treat your lawn?
You should fertilize your cool-season lawn in fall and/or spring, and fertilize your warm-season lawn in mid-to-late spring and/or summer.
How do I know if my lawn has grubs?
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.
Does grub control need to be watered in?
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.
How late can you put GrubEx down?
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.
Can you put grub killer down with grass seed?
Can I put grub-killer and grass seed down at the same time? If not, which one should I do first? A: There’s nothing in grub-killers or grub-preventers that’ll hinder grass seed. So yes, you can do both at the same time.
How do I know if I need grub control?
If you see more than five grubs per square foot, you may have an infestation. If you’ve found larger numbers of grubs in each hole, then at this point, it’s time to call in the experts before the grubs kill your grass.
How do I bring grubs to the surface?
Mix 3 tablespoons of liquid dish soap in 1 gallon of water. Spray a 2-square-yard area with the mixture. Wait 10 minutes and count the number of grubs. If there are more than five grubs per square foot, the infestation is severe enough to treat.
What is the life cycle of lawn grubs?
Life Cycle Grubs feed until fall and then burrow deep into the ground to overwinter. In spring, grubs burrow upwards to grass roots, resume feeding until late May, and then transform into pupae. Adult Japanese beetles emerge around the first week of July; European chafers about two weeks earlier.
Will grass grow back after lawn grub?
As a result of extensive root damage caused by these larvae or lawn grubs, your lawn can no longer take up the moisture and nutrient it requires efficiently. When at its worst, the grass will actually be able to be peeled back easily from the soil surface as the roots have been eaten away.
Will grubs go away on their own?
Answer 2: A naturally occurring pathogen, milky spore disease (Bacillus popilliae), affects beetle larvae and will kill grubs without harming you or your garden, but it can take one to three years to become fully effective.
