Curl grubs in soil help please

I have always had a few curl grubs in my soil but i have one tree this year that has a huge amount. Does anyone know of a chemical that is safe to apply to the soil to kill the little buggers. They have not caused any visible damage to the tree, a fig, but it is only a matter of time . Any help would be appreciated
thanks Bonsaiboy50

There are some organic bacterial compounds sold in the US for this, a product called Milky Spore Disease.

submerge the pot in water for some hours and drown the grubs. Hopefully they should float to pick them off or else spray with chemical. If the submerging works gives us a shout.

adam1234 wrote:submerge the pot in water for some hours and drown the grubs. Hopefully they should float to pick them off or else spray with chemical. If the submerging works gives us a shout.

Good idea , many thanks will try it and let u know