Organic Controls for Garden Pests
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Chafer grubs - A threat to your lawns and beds

Chafer larvae can cause devastating damage to lawns. Some of the damage is caused by the grubs chewing at the roots of the grass, but much of it is caused by birds and animals scratching away at the soil searching for the juicy grubs.

The grubs hatch out to become flying beetles - sometimes called May Bugs because they typically emerge in mid May. These beetles lay eggs in June which hatch out in July to eat grass roots until October. They typically dig deeper into the soil over winter until they surface in April/May before pupate to fly, mate and lay eggs again.

Click here for Chafer Grub treatment

Identifying the larvae

We get many calls from people whose lawns are being destroyed by grubs, and the first thing they notice is that the birds, badgers and foxes are digging away at the grass. Our advice is to go digging in the bare patches and try and find what the birds are digging for. Once you get a sample you can make a positive identification and buy the right treatment. The two most common grubs in the lawn are chafer grub and leatherjackets and it is really quite easy to see the difference if you look at the pictures on this web site. Chafer Grubs are white grubs with a brown head, not unlike Vine Weevil grubs but bigger and shinier with distinct pairs of legs at the front end. They can easily be distinguished from leatherjackets which are more wormlike, without obvious legs or head.

There are four species of chafer grub recorded in Britain.
The commonest types of root-feeding chafer are: Amphimallon solticialis (sometimes called summer chafer) Phyllopertha horticola (sometimes called lawn chafer). These are very similar, but found in different parts of the country. ...more info . Both can be treated with nematodes.
The largest of the chafers - the "Large Cockchafer" (Melolontha melolontha) - are not readily susceptible to nematodes as they are larger, tougher, and have a longer lifecycle.
The fourth species is the Rose chafer Cetonia_aurata but these feed on compost and are not such a problem on lawns.

Biological control with nematodes Heterorhabditis megidis

We supply  microscopic beneficial nematodes (eel worms) which are watered into the lawn. They enter the chafer bugs and poison them so that they will die within a few days. The best time to apply chafer grub control is at the end of the summer, when the newly hatched grubs will be at their most vulnerable. However if you find after a warm spring that the grubs are a problem even before they have pupated in May, then you may want to treat them at the beginning of the season. The treatment may be more effective in Autumn than in spring, but if your lawn is suffering then some treatment is better than none.
More information...

Standard Pack - 100sqm
38.95 inc P&P

Large Pack - 500sqm
134.95 inc P&P