Asiatic and Tree lillies round semi circle bites on leaves

Hi

I have lots of varieties of Asiatic lillies and some tree lillies in the garden. I got rid of the scarlet lilly beetle and there young which seem to stay under and scrape away the leaf until there is a brown net like web left of the leaf. However, i've now noticed semi circular like bits cut out on the leaves, getting more and more widespread. They're looking in pretty poor form. Any ideas what this is?? I saw some winged ant like insects on them with twitching wings, not sure if they have anything to do with this-maybe cutting away the leaves? The tree lillies are not as badly affected.

Thanks

 

Hi Shaneoak. In general, the leaves of most plants, including trees are the first points of contact in relation to fungal, viral and insect attack. A picture would be of help here. However, whatever it is. With liliums, the bulb must always be considered. I would probably keep an eye on any futer increase of thr damage. Remove affected leaves. If the plants have flowered, then the stems can be cut down 50%. Hope this helps.

 

@Shaneoak A photo would help, but could be vine weevil. Adult vine weevil snip semi circles out of leaf edges.

 

Could be leaf cutting bees.
I get lots of them round here, the circular cut outs are pretty regular in size.

 

I've got exactly that problem with my Wisteria. Semi circle 'bites' over all the leaves. Doesnt seem to be on any other plants though. I have noticed several different looking kinds of bees in my garden so maybe one of them is a leaf cutter. I'm guessing there is nothing that can be done? Obviously I wouldn't want to harm the bees in any way! There are actually more semi circles missing than leaf left now which is a shame.

 

Leaf cutters take a liking to a particular plant and tend to use that one all the time, I think it's about the right texture that they go for, too hard or too soft not ideal.
I often see them flying around with a circular piece of leaf.
I think the harm they do is mostly minimal.

 

It seems quite bad to me. Maybe it's something else?? The whole plant is like this

 

That does look bad. Never had it quite that bad on any thing.
Can you find out where they are going with the pieces of leaf.

 

Sat watching the plant for ages. Although plenty of bees about nothing went near the wisteria with a knife and fork! I have 2 and they are about 20ft apart and are both being munched in the same way. Very annoying. Incidentally neither of them flowered this year or have put on much if any growth.

 

Leaf cutters are not around here at the moment, I think they work in generations if that makes sense.

The activities stop at a certain time and the resulting grubs over winter.

 

Cripes, if that's bees then they must have escaped from a GM unit somewhere.. That's serious damage.
I wonder if a garlic clove spray might deter the blighters (weevil or bees.)
At that rate of damage there won't be much to spray i guess. Much as i enjoy my gardening there have often been times over the years when a nasty attack has ocurred of one sort or another and it can be quite savage.
Then the following year it vanishes.
Either nature provides a helper or the pests move on. Hopefully yours will too.

 

This si what's happening to my lillies...they seem to have left the tree lillies alone and just gone for teh Asiatic lillies. There's a white winged ant like thing that flies near them and then buzzes off, not sure if that's it and then saw some round green bugs...so no idea..

 

@Shaneoak Could be damage caused by adult lily beetle. It looks quite old as well as the edges are dry and brown.

 

Lilly beetle or vine weevil I would guess.

 

A daft question I know but Im good at those ..... I have Calla's in pots and at present they are just about finishing their flowering. I read somewhere that these are not a 'true' lily?? The question is.........is that right and if so does that mean they will not be likely to be attacked by the lily beetle?? Also should I cut back foliage as well as spent flower stems or leave it to die back like you do with various bulbs?