On 29/01/2011 17:36, Jake wrote:
(snip)

As a
precaution, if you don't mind chemicals, find some Provado Ultimate
Bug Killer - look for the trigger spray version, not the aerosol
simply because of cost. Then when your lilies start to develop
foliage, give them a spray LATE IN THE EVENING.

Due to the idiotic brand naming of many insecticidal products, Provado
Ultimate Bug Killer concentrate and aerosol do not contain the same things..

The concentrate contains only thiacloprid, whereas the aerosol contains
imidacloprid and methiocarb. I found the original Provado
(imidocloprid) to be pretty ineffective against lily beetle, so turned
to the aerosol product. This worked - and continues to work - but I
have stopped growing lilies because it is a waste of time trying to
fight lily beetle in the south-east. Even if thiacloprid was effective
on its own, I would not waste money using it against lily beetle.

--

Jeff