On 28/02/2013 12:02, Sacha wrote:
On 2013-02-27 23:05:53 +0000, Bob Hobden said:

"Jeff Layman" wrote

, Spider wrote:
David.WE.Roberts wrote:
We have two lemon trees indoors by the bi-folds.

They are doing well apart from the aphids.

From recent Googling the biological controls are not available yet
this
year.

Spraying advice doesn't seem to include Citrus in the UK.

Any recommendations?
More importantly, anything NOT to use?

They can be considered ornamental at the moment because they are
showing
no sign of flowering.


Bayer seem to have the answer:-

http://www.bayeradvanced.com/insects...stions-answers


I have never used this chemical, so this is not a recommendation, but
hope it helps.

You've never used imidacloprid (Provado)? It's the active ingredient
in that product.


Isn't that one of the chemicals that is killing the bees?

Yes. Trying to avoid using these is very important.
http://www.soilassociation.org/wildl...holdpesticides



Gladly acknowledged, Sacha, but I thought it was **relatively** safe if
not sprayed directly onto open flowers, and preferably sprayed during
the early morning or late evening when bees are not active.

I have used it sparingly indoors on an orchid; also I imagine Dave would
be using it indoors, so bees would not be harmed in these two instances.
However, I believe the toxin takes a long time to degrade so there may
be issues with citrus and other edibles, which is why I didn't suggest
it to Dave.

I'm prepared to be wrong .. I am sometimes ;~).

--
Spider
from high ground in SE London
gardening on clay