This will do two things; Leave it for a good two weeks to let it work its way into the roots. I’d also love to see any before and after pictures. It’s important to keep the soil moist for at least two weeks after application.

Chafer Grub invasions are pretty easy to spot. As if I was there doing it all for you! The most common (and, sadly, most effective) ways to kill grubs are chemical insecticides. Water is essential to the health of your lawn but keep watering to a minimum during the summer months. By treading your lawn once a week with these sandals you can effectively control the numbers of grubs by killing them with the spikes on the sandals. These two insecticides are the only options if high numbers of grubs are found in the fall and in spring before early May. It will take 10-14 days for the grubs to begin dying after the insecticide is applied. They are short-lived compounds that kill all life stages of grubs. Healthy turf with a few grubs may not need an insecticide. If you see a dead patch, use a shovel to dig up a few Frisbee-size samples of turf around the bare spot to a depth of 2 inches and look for 0.75-inch long, C-shaped white grubs. 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. You can do this with a spade or turfing iron. Proper fertilization is important to prevent and allow the lawn to recover from grub damage. Garden and Welsh Chafer Grubs are typically between 10mm – 15mm long and you’ll see them lay in the soil under the turf in a ‘C’ shape. 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. Still, it is possible to return your lawn to its former glory. If you’re happy to mix a concentrate and you have a knapsack sprayer to apply it, then I recommend Elixir Garden’s Home and Garden Glyphosate Commercial Strength Weed Killer Concentrate. That’s the Japanese beetle and the masked chafer,” said Shetlar about his home turf. 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. There’s no getting around it, Chafer Bugs are a lawn keepers bitter enemy. If you’ve had a bad infestation, apply it in the spring too, early April to the end of May while doing your other spring lawn jobs. To have a digest of information delivered straight to your email inbox, visit These worms then reproduce inside the dead grubs and a new generation is released to prey on more Chafer Grubs. Chafer Beetles prefer to lay their eggs in more compacted soil. Read: How to Scarify Your Lawn From Start to Finish. is a participant in the Amazon EU Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to

The second major concern is to make sure the insecticide is thoroughly watered into the ground with at least a half-inch of irrigation or rain immediately after the chemical is applied. May 22, 2020.

Carefully check the label for ingredients. If you live in rural areas, you might also start to find molehills appearing as they look for food.

There are two chemicals, carbaryl and trichlorfon, that are considered curative treatments. Although Chafer Grubs can damage the grass, it’s often not them themselves that cause the most destruction. This chemical consistently reduced grub numbers by about 65-80% and research has shown that applications made before June are more efficacious than June or July application. Read: Everything You Need to Know About Fertilising Your Lawn. The presence of a few Chafer Grubs in your lawn shouldn’t cause you to panic.

It can be used to keep your lawn fertilised during the dry summer months. This is when the Grubs are closest to the surface. All Rights Reserved. These two insecticides are the only options if high numbers of grubs are found in the fall and in spring before early May. It was also reported in Wisconsin in 2013. The larvae of both species look almost identical. He’s also co-author of the comprehensive guide “Garden Insects of North America,” plus other pest management tomes including “Managing Turfgrass Pests.”. Our research has indicated that carbaryl has been a little more effective on European chafer grubs than trichlorfon. However, Shetlar did let on that the most experienced organic lawn care professionals may have the knack for using them effectively against white grubs. Here’s why; You must scarify BEFORE applying the grub killer. If this is the case, follow these instructions; If you’ve had an infestation of Chafer Grubs the first thing you should do is scarify your lawn. MSU is an affirmative-action, equal-opportunity employer. Follow this blog to stay tuned with what you need to keep your lawn in tip-top shape year-round. 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. In fact, most well-maintained lawns do not have visible damage from grubs. If you apply the grub killer and then scarify you’ll disrupt the soil while the Nematodes are trying to work. Milky spore is a spreadable bacteria known as Bacillus popilliae that can be used … If you’re replacing your lawn, here’s what to do; Apply a weedkiller that contains Glyphosate. It’ll also kill the grass which is the Chafer Grubs food supply. They are not as effective as the preventive compounds in reducing grub numbers. Preventive products containing imidacloprid, thiamethoxam or clothianidin will consistently reduce 75-100% of the grubs if they are applied in June or July and if they are watered-in with 0.5 inches of irrigation immediately after application. The only way to deal with Chafer Grubs in your lawn is to kill them by applying a product called Nemasys Chafer Grub Killer.

Japanese beetles like to lay their eggs on irrigated turf like golf courses, athletic fields and highly maintained lawns. There is a widely sold trade name called Triazicide from Spectrum that lists grubs on the label and states it will control insects above or below ground and has a picture of a grub on the front of the bag. If it’s still firmly rooted, then you have another problem, such as brown patch or dog urine damage. However, an infestation of Chafer Grubs can cause a lot of damage to a lawn.

If applied too late, preventative products may not be effective as they work best on small grubs.

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