White grubs in potted citrus tree - PLEASE HELP!!

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White grubs in potted citrus tree - PLEASE HELP!!

Postby SpringChicken » Tue Mar 13, 2012 1:32 pm

Hi everyone :D

I'm fairly new to gardening and have 5 dwarf citrus trees growing in large pots (lemon, lemonade, lime, orange, mandarin). 3 of the trees have green fruit on them which I recently noticed had dull beige patches on the underside of the fruit. I asked a friend who told me it was probably a fungal issue caused by lack of proper drainage (we've had a lot of rain lately - coastal NSW). Anyway I decided to add some extra holes to the bottom of the pots and quite a lot of water drained out.

I was considering repotting them into new soil, but a landscaper told me not to worry and to just fertilise the trees. Today I decided to fertilise the citrus trees using citrus fertiliser (the granule one) and digging it around the edges of the pot. Anyway I started with the lemonade tree... to my horror and disgust I discovered these fat white c-shaped grubs with orange heads! :-@ I dug around a little more and kept finding them! I squashed all the grubs I came across but now I'm not sure of what to do.

I haven't investigated the other trees yet for fear of damaging their water roots (I hope I haven't done too much damage to the lemonade tree :(). Is it likely they will be in the other pots too?? Is there a way to get rid of them without destroying the trees?? I really don't know what to do... do these grubs hang around the soil at the surface, or do they go deep down into the roots etc?? I read all the posts here that I could find on these grubs but can't find the information I need.

Please help!! Any advise would be greatly appreciated.
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Joined: Tue Mar 13, 2012 12:51 pm
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Re: White grubs in potted citrus tree - PLEASE HELP!!

Postby Pam » Tue Mar 13, 2012 2:33 pm

They're curl grubs spring chicken - the larvae of various beetles. While they generally do very little harm in the ground, they can do serious damage in pots.

There have been some heated discussions here about them in the past.

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