[IBC] Azalea disease

Theo

I found many leaves like this on an Azalea I have since 9 years
this is the first time I see such a stuff
could someone tell me what it is a how to cure it?
the leaves are dark green and specked with round paler green dots ,
it is not chlorosis some stains are 1 mm diameters others 3 mm
diameters sometimes separated sometimes united in clusters
Thanks
Theo[/img]

http://internetbonsaiclub.org/galle...opic.php?t=1486

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Jim Lewis

It is hard to tell from that picture, Theo. As Alan says if you
can get a macro view of the leaves it will help.

If the leaves are DISTORTED (raised bumps, like blisters), you
may have azalea leaf gall. It is harmless. Just remove the
leaves.

Check the undersides. You may have scale. Use an alcohol-based pyrethrin spray, or rub them off.

Or, it could simply be old leaves. Are they mostly INSIDE
leaves? If so, they're last year's spring crop and will just
fall off.

Jim Lewis - jklewis@nettally.com - Tallahassee, FL - Only where people have learned to appreciate and cherish the landscape and its living cover will they treat it with the care and respect it should have - Paul Bigelow Sears.

Andrew G

"Theo" <byjoke@ch.inter.net> wrote in message
news:cc6vet$gei$1@news.eusc.inter.net...
> I found many leaves like this on an Azalea I have since 9 years
> this is the first time I see such a stuff
> could someone tell me what it is a how to cure it?
> the leaves are dark green and specked with round paler green dots ,
> it is not chlorosis some stains are 1 mm diameters others 3 mm
> diameters sometimes separated sometimes united in clusters
> Thanks
> Theo[/img]

The link wouldn't work for me for some reason, but judging by the
description it could possibly be azalea lace but.
Check under the leaves and if you see small "fly" type insects, whose wings
look almost like lacework (and seethrough) that would be lace bug.
If so you can spray with a systemic insecticide. I know Rogor is one here in
Australia, you may have it over there. If not ask at a nursery. Just watch
it as it is pretty potent to humans. The leaves will not recover if it's
lace bug, and it may loose affected foliage, but it will come back.
Good luck
>
http://internetbonsaiclub.org/galle...796c8f7e211641e
dbd53d3e95ba
>
> --
> Theo_694@hotmail.com MSN messanger / or ICQ 25 666 169 4
>
> L'Umiltà è la Peggiore delle Presunzioni
> (la Rochefoucauld)
>
> «»«»«» Just for today...be happy «»«»«»
>

Theo

Hi Jim

Jim Lewis wrote:


> It is hard to tell from that picture, Theo. As Alan says if you
> can get a macro view of the leaves it will help.
will try to make soem with my digital

>
> If the leaves are DISTORTED (raised bumps, like blisters), you
> may have azalea leaf gall. It is harmless. Just remove the
> leaves.
thinks for thsi second information I found it 2 months ago on another
one and immediately removed... but I did not know the words to explain
it here
gall =galle in french
that's ok thanks
>
> Check the undersides. You may have scale. Use an alcohol-based
> pyrethrin spray, or rub them off.
>
> Or, it could simply be old leaves. Are they mostly INSIDE
> leaves? If so, they're last year's spring crop and will just
> fall off.

Got it thanks for the moment


Theo_694@hotmail.com MSN messanger / or ICQ 25 666 169 4

L'Umiltà è la Peggiore delle Presunzioni
(la Rochefoucauld)

«»«»«» Just for today...be happy «»«»«»

Theo

Andrew G wrote:

> "Theo" <byjoke@ch.inter.net> wrote in message
> news:cc6vet$gei$1@news.eusc.inter.net...
>
>>I found many leaves like this on an Azalea I have since 9 years
>> this is the first time I see such a stuff
>> could someone tell me what it is a how to cure it?
>> the leaves are dark green and specked with round paler green dots ,
>>it is not chlorosis some stains are 1 mm diameters others 3 mm
>>diameters sometimes separated sometimes united in clusters
>> Thanks
>>Theo[/img]
>
>
> The link wouldn't work for me for some reason, but judging by the
> description it could possibly be azalea lace but.
HI
I'll try to make some more neat it looks like as
> Check under the leaves and if you see small "fly" type insects, whose wings
> look almost like lacework (and seethrough) that would be lace bug.

heer they are teh new pics
in teh second one a smal bug is vivsible I could see only when teh pic
was made not before
might be it teh responsible of tehse spots
no flies under the leaves

http://internetbonsaiclub.org/galle...p?p=11243#11243

> If so you can spray with a systemic insecticide. I know Rogor is one here in
> Australia, you may have it over there. If not ask at a nursery. Just watch
> it as it is pretty potent to humans. The leaves will not recover if it's
> lace bug, and it may loose affected foliage, but it will come back.
> Good luck
ok I'll what I have in my chemistry mut have quite a few and one will do
since last year that we had terrific heat wave in Switzerland a lot
of bugs come out in spring my maples look horrid
Thanks again for all informations

>

Theo_694@hotmail.com MSN messanger / or ICQ 25 666 169 4

L'Umiltà è la Peggiore delle Presunzioni
(la Rochefoucauld)

«»«»«» Just for today...be happy «»«»«»

Jim Lewis

>
> The link wouldn't work for me for some reason, but judging by
the
> description it could possibly be azalea lace but.
> Check under the leaves and if you see small "fly" type insects,
whose wings
> look almost like lacework (and seethrough) that would be lace
bug.
> If so you can spray with a systemic insecticide. I know Rogor
is one here in
> Australia, you may have it over there. If not ask at a nursery.
Just watch
> it as it is pretty potent to humans. The leaves will not
recover if it's
> lace bug, and it may loose affected foliage, but it will come
back.
> Good luck
>
That's rather drastic treatment for lacebug. A soap spray or a
pyrethrin spray (with or without soap) will do just as well and
at a lot less risk.

Jim Lewis - jklewis@nettally.com - Tallahassee, FL - Only where
people have learned to appreciate and cherish the landscape and
its living cover will they treat it with the care and respect it
should have - Paul Bigelow Sears.

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************************************************** ******************************
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Jim Lewis

> heer they are teh new pics
> in teh second one a smal bug is vivsible I could see only
when teh pic
> was made not before
> might be it teh responsible of tehse spots
> no flies under the leaves
>
>
http://internetbonsaiclub.org/galle...p?p=11243#11243
>

Well, whatever it is -- and I suspect it is a sucking insect
(whitefly, lacebug, etc.) damage -- you don't have a serious
infection. If you see the insects, spray them (soap, pyrethrin
or a combination). Otherwise, remove the leaves.

The leaves look very healthy, otherwise.

Jim Lewis - jklewis@nettally.com - Tallahassee, FL - Nature
encourages no looseness, pardons no errors. Ralph Waldo Emerson

************************************************** ******************************
++++Sponsored, in part, by John Quinn++++
************************************************** ******************************
>>-->> The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ <<--<<
+++++ Questions? Help? e-mail BONSAI-REQUEST@HOME.EASE.LSOFT.COM +++++

Andrew G

"Jim Lewis" <jklewis@NETTALLY.COM> wrote in message
news:001a01c461c6$afdc8460$17102cc7@pavilion...
> >
> > The link wouldn't work for me for some reason, but judging by
> the
> > description it could possibly be azalea lace but.
> > Check under the leaves and if you see small "fly" type insects,
> whose wings
> > look almost like lacework (and seethrough) that would be lace
> bug.
> > If so you can spray with a systemic insecticide. I know Rogor
> is one here in
> > Australia, you may have it over there. If not ask at a nursery.
> Just watch
> > it as it is pretty potent to humans. The leaves will not
> recover if it's
> > lace bug, and it may loose affected foliage, but it will come
> back.
> > Good luck
> >
> That's rather drastic treatment for lacebug. A soap spray or a
> pyrethrin spray (with or without soap) will do just as well and
> at a lot less risk.

Yeah, maybe it is on a bonsai, drastic that is. Perhaps I should have typed
post a little better. The treatment I suggested will not hurt the plant, or
cause foliage to drop. The foliage will drop due to the lace bug. It's just
at work when our Azaleas are infected by lace bug the only treatment that
seems to work is rogor (or similar/equivalent). Our Azaleas may be unlucky
to get lace bug once a year max. The problem is we have used organic sprays,
and were actually a test area for them, and if you did not get the spray to
contact every bug reinfestation occured shortly after. Same happened with
the Aphids. Then again, being a bonsai, ie small, it would be a lot easier
to get all the bugs. Sorry, it wasn't something I thought of till now.
For the original poster it's not lace bug, as the second link worked for me
and I saw the bug. Looks to be a aphid. They could have caused the dots,
that I'm not sure about. Certainly the bug is not scale, as scale are
usually hidden under a coating of some sort (sometimes wax).
If you really want to go organic, and this will work, introduce predatory
wasps or the good ladybirds to get rid of them. You would have to buy them
from somewhere in your local area.

Good luck with it.
Andrew
Forster, Mid North Coast, NSW Australia

> Jim Lewis - jklewis@nettally.com - Tallahassee, FL - Only where
> people have learned to appreciate and cherish the landscape and
> its living cover will they treat it with the care and respect it
> should have - Paul Bigelow Sears.
>
>
************************************************** **************************
****
> ++++Sponsored, in part, by John Quinn++++
>
************************************************** **************************
****
> >>-->> The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ <<--<<
> +++++ Questions? Help? e-mail BONSAI-REQUEST@HOME.EASE.LSOFT.COM +++++