What are chafer grubs?
Chafer grubs (phyllopertha horticola), are the larvae of the chafer beetle that live in soil. They eat the roots of grass, causing yellowish patches to appear on the lawn.
The chafer grub burrows holes through vegetation including lawns, resulting in large patches of bare brown grass. If they are left untreated, they can cause extensive damage to your lawn by enticing predators such as birds, badgers and foxes to dig for a tasty meal. Just like your lawn, chafer grubs in pots when planting are also quite common.
How can I spot chafer grubs?
If you have chafer grubs in your lawn, you will start to notice them most around autumn and spring time, as that’s when they start to mature and feast on the grass roots in your lawn. The first thing to look for if you are having problems is yellow patches during the autumn and spring months. You might also notice discoloured patches on your lawn or patches that have been dug up by birds or other animals that eat the grubs.
You can search for chafer grubs under loose turf and soil. They are larvae with white, curved bodies and light brown heads. If you look closely, you’ll spot several pairs of legs towards the head.
If you think you have a chafer grubs infestation, get in touch with us or speak to your local lawn care expert. You can give us a call today on 0808 100 1413 for help, advice and our recommended treatment
Chafer grubs life cycle
As chafer grubs are beetles, their life cycle matches that of other beetles. Chafer grubs in lawn soil will lay their eggs into it, which will then eventually hatch into tiny white grubs. These new grubs will continue to feed on roots, so it’s important this issue is resolved to save your grass. When winter arrives, the grubs burrow deeper into your soil and can lie dormant for a long period of time. When spring arrives, you’ll see them emerge once more. The adult beetles are more likely to appear between the end of May and July. They’ll then begin to lay their eggs on the surface of the soil.
Once the larvae start to mature and grow, they will attract other wildlife that feeds off them. If you start to notice more birds, foxes or similar wildlife in your garden, tearing up the lawn in order to eat the grubs, then this is a sign of a chafer grub infestation. This can be the biggest problem with chafer grubs, as your lawn can really suffer from other animals tearing it apart
Chafer grub treatment
Your Greensleeves local lawn care expert will use our own biological insect control treatment, known as nematodes, to kill the chafer grubs. This is most effective between July and October when the chafer grubs are most active.
This specialist, nematode chafer grub treatment can only be used in the right conditions, when the soil temperature is higher than 12 degrees and is moist enough to support the nematodes.
Before the application of the chafer grub treatment, the lawn should be mowed and spiked. This ensures most effectively that the nematodes can reach the chafer grubs, which live in the top layer of soil. The nematodes will be mixed with water and applied to the lawn using a backpack sprayer.
How long do chafer grubs live?
Chafer grubs can live and feed in your lawn’s soil for up to 4 or 5 years if left untreated. They will continue to pupate over winter and hatch into adults in the spring. It is very important to treat a chafer grub infestation as soon as possible after identifying, to ensure you save your grass and keep it healthy throughout the year.
How do you treat chafer grubs?
These pesky larvae can cause serious lawn issues, so it is best to keep an eye out and take action when you see them. If you do spot chafer grubs, then you should speak to us for more information about how to treat them safely and effectively.
How long does it take for nematodes to kill chafer grubs?
Once your chafer grub treatment has been administered, it will usually take 3 to 7 days for results to show, but allow 2 to 4 weeks for the maximum effect. Nematodes are the recommended insect control treatment whenever grubs or their larvae are present in the lawn.
Have you spotted chafer grubs in your lawn? Get in touch with Greensleeves today.
If you think you may have an infestation of chafer grubs, Greensleeves can provide a professional treatment to eradicate the troublesome lawn pests and protect your lawn against future infestation.
For more information about chafer grubs and our recommended course of treatment, get in touch with your local lawn care expert at Greensleeves today. Give us a call on 0808 100 1413 or talk to a member of our team using our live web chat.