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The Box hedge moth infestation


If you have any box in your garden, we recommend you act as soon as possible!

Unfortunately this is what box hedes look like after the devastation of the box moth
The Cydalima perspectalis, is a recent alien import, whose natural home is East Asia. It has spread across Europe in the past 10 years and has been in the UK for a few years now.

The season for Cydalima perspectalis is from late March to the end October.

In the UK 3-4 life cycles each per year depending on temperature, these last around 45 days.



There are 2 main biological treatments we use (we don't use chemicals, would rather get nature to work for us...). We recommend using both.

1.) Bacillus thuringiensi : 
Bacillus thuringiensis (Bt) is a natural occurring, soil-borne bacteria for natural insect control. It consists of a spore, which gives it persistence, and a protein crystal within the spore, which is toxic to the moth.

2.) Pheromone trap
Pheromone traps are a good indicator of moth activity in your garden and also as a preventative measure.  Depending on which trap you buy it will last between 6 weeks & 3 months per dose of pheromone

The RHS is testing nematodes  RHS Testing of Nematodes for BASF but this is still in testing phase.

What have we been up to?

Quite a few new designs last year... and of course still looking after the ones we built and the established ones we maintain ...
Have a look at the gallery page on our website


Eager to learn more?

Revisit our previous Newsletter: www./
Our tips:  www./
Gardeners’s Question Time:
RHS advice:  www,

If you have any questions or comments please do email us at
If you would like to discuss your garden project or arrange an initial consultation please contact Lola by email or telephone
(T - Lola) +44(0)7968 356189 
our website to see what we do best!
If unsure you can contact us or the RHS for help (RHS members can send samples for assessment).

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BLACK DAHLIA GARDEN DESIGN · 5 Benyon Warf, 295 Kingsland Road · London, E8 4DQ · United Kingdom

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