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Title: japanese maple
Post by: jokey on May 11, 2011, 17:21:08

Hi all

can anyone tell me what this is on my Japanese maple, never seen this before and it doesn';t seem to have bloomed as well

help

jo

(http://i592.photobucket.com/albums/tt5/jokey_02/japanesemaple001.jpg)

Title: Re: japanese maple
Post by: Tee Gee on May 11, 2011, 17:30:57

Looks like scale insects to me;

http://thegardenersalmanac.co.uk/Data/Scale%20Insects/Scale%20Insects.htm (http://thegardenersalmanac.co.uk/Data/Scale%20Insects/Scale%20Insects.htm)

Click on picture to enlarge which shows a 'soft scale' type.

I think yours is a 'hard scale' type.

Do a google this might give you more info!

Title: Re: japanese maple
Post by: Palustris on May 11, 2011, 17:37:08

Definitely scale insects. Nasty sap sucking critters. You need a soap based insecticide (not Fairy liquid either). The soap dissolves the wax coating on the insects which makes them waterproof and impervious to normal insecticides. OR. You could paint them with Methylated spirits and brush them off. OR you could use a power spray and wash them off. Not too powerful a jet or you might damage the bark.

Title: Re: japanese maple
Post by: jokey on May 11, 2011, 19:01:23

thanks for your replies

i will try all

jo :-\

Title: Re: japanese maple
Post by: jokey on May 19, 2011, 08:56:38

hi all

i washed the scale off my japanese maple then sprayed it, now i noticed scale on my young sycamore tree. can anyone tell me what other plants/flowers its likely to appear on and has this transferred from my japanese maple

thanks

jo

Title: Re: japanese maple
Post by: Bugloss2009 on May 19, 2011, 09:27:58

scale insect infestations like yours are usually a sign that the tree is under some stress, I mean not growing under in the best conditions. I get them on my lemon tree, obviously a different type of scale insects

Title: Re: japanese maple
Post by: Unwashed on May 19, 2011, 09:47:51

They infested my magnolia once. I got them off with some meths on a bit of cotton wool - laborious, but safe - and they didn't come back. I suspect they're quite specific about what they'll infest, though sycamore and maple are closely related so I don't doubt it's the same insect.

Title: Re: japanese maple
Post by: jokey on May 19, 2011, 14:22:32

thanks all,

i will try and clean them off

jo

Title: Re: japanese maple
Post by: Obelixx on May 19, 2011, 16:42:53

It looks like horse chestnut scale which can affect a variety of trees. You can scrub off infestations now or wait till July when they hatch and spray with Provado Ultimate Bug Killer when the insects are young and susceptible.

There's more info here from the RHS - http://apps.rhs.org.uk/advicesearch/Profile.aspx?pid=650

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Produce => Pests & Diseases => Topic started by: jokey on May 11, 2011, 17:21:08