The larva of the chafer is a white worm which cause of serious damage to the garden. The problem is, the bug is rather tough since it can reside in the soil for a good three years, feeding on the roots of plants. She’s also damn ravenous. It is therefore necessary to get rid of the chafer larva. But what are the best solutions to eradicate this white grub in the garden without chemicals? The answer in detail.
How to spot the presence of the white grub?
Certain signs should alert the gardener, such as the yellowing of certain plants or the fact that the crops vegetate. This may indeed indicate the presence of beetle larvae in the soil.
We can also fear the installation of white grubs in the garden if we regularly see beetles … In any case, it is essential to react as quickly as possible, that is to say before even deploring insurmountable damage on its cultures. Do not hesitate to work the soil with a spade to check that white grubs are present at the foot of each of the suffering plants.
The best natural solutions to eliminate cockchafer larvae (white grubs)
All the larvae of the chafer must be eliminated. There are several ways to do this effective natural, which makes it possible to have no negative impact on the environment and health.
Give grubs to gardener’s friendly animals
The enemy larvae can be placed in a container to be left in evidence, because they will soon be eaten by hedgehogs and birds of the air for which these grubs are a delicacy. But it is also possible to distribute them to your chickens. These are simple solutions that are, moreover, very useful.
Using a larval killing fungus
This is the case of Beauveria brongniartii whose action is very effective on white grubs. It should simply be incorporated into the cultivation soil during the spring after obtaining it from gardening stores.
Deposit parasitic worms that feed on June beetle larvae
This is the case of :
- Steinernema carpocapsae,
- Steinernema feltiae,
- Heterorhabditis bacteriophora.
These microscopic worms are the gardener’s friend since they feed on numerous insects causing havoc on all kinds of plantations. They fall into the category of garden helper nematodes. They are easily obtained from a pet store where they are packaged in small bags. The mixture contained in these pouches is diluted in water according to the instructions on the packaging, and then all you have to do is spray this liquid into the soil, where the contamination by the larvae of beetles has been identified.
From this moment, the micro nematodes invade the white grubs, insert themselves into their organism and then simply feed on them after having poisoned their enemy hosts. In less than ten days, we can thus be rid of the white grub.
Preventive control of white grubs, chafer larvae
Since prevention is better than cure, you might as well act upstream to preserve your plantations. The good idea is to resort to spraying nematodes at preventive title. There is no need to fear auxiliary insects and beneficial microorganisms since nematode worms only attack enemy larvae.
Another solution is to prevent adult beetles from taking up residence in the garden and consequently. In this way, we protect the cultivated soil against the risk of being infested by white grubs. It suffices to do this use repellents natural that these beetles hate such as:
- Geranium: it can be planted anywhere in the garden, which combines business with pleasure since geranium also repels mosquitoes and blooms abundantly from late spring until frost.
- The coffee grounds: rather than throwing it in the trash, we spread it on the soil of the garden before digging it.
- The diatomaceous earth: it is a highly effective and 100% natural antiparasitic product. It can be used in organic gardens.
Finally, some gardeners end up tolerating the presence of moles – and even by appreciating it – because these small burrowing mammals are part of the sworn enemies chafer but even more of its larvae.
The chafer is among the large garden pests, in particular because it is its larvae that ruin the plantations by attacking their roots. This issue should not be taken lightly. The more white grubs there are, the more beetles there will be which will therefore reproduce … vicious circle who can quickly become infernal for his garden and that of his neighbors. In the off-season, it is therefore essential to dig deeply in order to dislodge all the chafer larvae that hibernate until spring. For easy digging, especially if you have a large lot, it may be wise to invest in a tiller so that digging is less daunting.