
Dragonfli's Three-Step Strategy To Combat The Entire Box Tree Moth Life Cycle
Box Tree Moths overwinter as caterpillars that hide deep inside the Box Plant foliage. As temperatures warm, the caterpillars will pupate and transform into moths. The female moths will proceed to mate and begin laying eggs in little clusters on Box tree plants. These eggs will then hatch into the damaging caterpillars that devastate and kill Box plants and hedges.
Dragonfli are on hand to help, however, and can now provide natural solutions against two critical stages of the Box Tree Moth life cycle!
Box Tree Caterpillars feed on Box plants and hedges and are capable of killing Buxus entirely if left untreated.
Stage 1: Catch Adult Box Tree Moths With Pheromone Traps To Reduce Egg Laying
The first step to take in combating Box Tree Moths is to set up your Box Tree Moth Pheromone Traps. These traps will catch male Box Tree Moths and prevent them from mating with females. The traps will also provide you with a valuable early warning of Box Tree Moth activity.
Our Box Tree Moth Pheromone Traps are the first key component in the defence against Box Tree Moth infestations.
Box Tree Moths have 2-3 generations a year, so it is good practice to keep your Box Tree Pheromone Traps active all spring and summer. Each pheromone lure lasts about six weeks, after which it should then be replaced. You can find replacement lures by clicking here.
Pheromone traps used solely will not catch enough Box Tree Moths to prevent entire infestations, so please be sure to also follow the next steps.
Box Tree Moths are identifiable with white coloured wings bordered by brown. They have a wingspan of roughly 4cm.
Stage 2: Apply Nematodes Directly Onto Box Tree Caterpillars
If Box Tree Caterpillars are observed on Box plants, apply our Box Tree Caterpillar Killer Nematodes directly onto the caterpillars. Only apply the nematodes if caterpillars are present. More than one application may be required, which is why two sachets of nematodes are included in Box Tree Caterpillar Killer. Apply the first sachet when Box Tree Caterpillars are identified, and apply the second sachet about a week later.
Simply spray our Box Tree Caterpillar Killer directly onto the caterpillars and the nematodes will enter the pest via a natural opening, before killing the caterpillars from inside.
Make sure unopened nematode sachets are stored in a fridge to keep them fresh, and avoid applying nematodes on bright, sunny days, as nematodes are U.V sensitive. The optimum conditions for applying nematodes are warm, overcast, humid days. Alternatively, simply apply the nematodes early, or late on in the day.
Box Tree Caterpillars can grow up to 30mm in length and are a greenish-yellow colour. They can be concealed within webbing spun around buxus plants.
Stage 3: Invigorate Renewed Box Plant Growth
Our two natural solutions combine to provide a complete biological control of Box Tree Moths and protect your valuable Box Hedges and plants from this devastating pest.
If looking to provide your Box plants with a further aid to recovery, consider also applying our Soil Boost biostimulant granules.
Soil Boost acts as an organic slow release fertiliser, helping the Box plants achieve newly invigorated growth after stress and damage.
If you ever need any further advice on how to combat Box Tree Moths feel free to get in touch via email at sales@dragonfli.co.uk, via social media, or by giving us a call on 01376 563322, and we’d be happy to assist.
Comments (38 Responses)
Julian Ives
Hi J. Denney,
Many thanks for getting in touch.
March may have been a bit early for the pheromone trap, as the Box Tree Moth was probably still in its overwintering caterpillar stage. There was therefore likely to have been very minimal, if any, adults moths flying that early.
The lures in the traps do last for six weeks, however, so I would suggest to keep them active, or appropriately replaced, to catch the next generation of male moths as soon as they appear.
To combat the caterpillars in the meantime, I would suggest spraying our Box Tree Caterpillar Killer Nematodes directly onto them as soon as possible.
I hope this helps but if you need any further assistance please don’t hesitate to reach out again and we’d be more than happy to help.
Kind regards,
Julian Ives [Director, Dragonfli]
Sally ashmore
Hi
We have a 18 foot high box hedge which has a caterpillar infestation. We have sprayed it as you suggest and left the traps out. Returning from holiday 10 days later I’m not sure anything has been caught in the traps. Maybe I have hung them incorrectly? From a twig just inside this huge hedge. Please advise !
Kind regards
Sally
J. Denney
Although I have put up a pheromone trap during March this year there has been no captures of box moths but plenty of caterpillars. Last year they worked very well. What could be the reason for this.
Julian Ives
Hi Amanda,
Many thanks for getting back in touch.
We have indeed discontinued the Box Tree Moth Egg Killer Sachets, we’re sorry to say, as we could not provide the wasps with the necessary protective outer material they needed to survive for a prolonged period in outdoor environments. The trichogramma are now purely being supplied for the control of Clothes Moth, Carnation Tortrix Moth and Pantry Moths.
We have a range of other Box Tree Moth controls available and in stock including traps, nematodes and a biostimulant, Soil Boost, to help damaged buxus regrow.
I hope this all helps but if you need any further assistance please just let us know.
Kind regards,
Julian Ives [Director, Dragonfli]
30 May, 2025
Julian Ives
Hi Sally,
Many thanks for getting in touch.
Our Box Tree Moth Pheromone Traps will not be able to catch moths if the pest is currently in its caterpillar life cycle stage as there won’t be many about. I would therefore suggest to keep spraying our Box Tree Caterpillar Nematodes whilst the caterpillars are visibly present.
Try to ensure that the nematodes come into direct contact with the caterpillars. Accurate aiming can be made easier with the aid of our Nema Super Sprayer or Nema T-Pot but several applications may be required before results become apparent.
I hope this helps but if you need any further assistance please don’t hesitate to reach out again and we’d be more than happy to help.
Kind regards,
Julian Ives [Director, Dragonfli]