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Best Box Tree Caterpillar Killer of 2026
Last updated on 15/05/2026
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1
Thuricide HPC BT 16oz Caterpillar & Worm Control
Generic
Why we love it
Bt based caterpillar control.
Safe for edible crops.
Low toxicity for people.
Main Highlights
Thuricide Hpc Bt 16Oz Caterpillar & Worm Control
Safe to use on all plants, vegetables and edible crops.
Very low toxicity to humans and pets.
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9.8
Exceptional
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9.8
Exceptional
Generic
Thuricide HPC BT 16oz Caterpillar & Worm Control
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Why we love it
Bt based caterpillar control.
Safe for edible crops.
Low toxicity for people.
Main Highlights
Thuricide Hpc Bt 16Oz Caterpillar & Worm Control
Safe to use on all plants, vegetables and edible crops.
Very low toxicity to humans and pets.
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Value for Money
2
Southern Ag Thuricide BT Caterpillar Control, 16oz - Pint
Generic
Main Highlights
Thuricide Hpc Bt 16Oz Caterpillar & Worm Control
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9.7
Exceptional
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9.7
Exceptional
Generic
Southern Ag Thuricide BT Caterpillar Control, 16oz - Pint
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Main Highlights
Thuricide Hpc Bt 16Oz Caterpillar & Worm Control
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3
Boxtree Caterpillar (Xentari) Rescue 50g
Generic
Main Highlights
Why Professionals choose this - * Immediate feeding inhibition: Target larve stop feeding within minutes of indegestion, providing instant protection for your foliage, 500m2 coverage (Appx) depending on dosing. * Superior strain potency: Specifically selected for its effectiveness against "Tough" species like Armyworms and Diamondback Moths which may resist standard treatments. * Pollinator-Safe Microbiology: Zero impact on Bees, Ladybird(Bug), or predatory mites when used as described. * Organic Compatibility: A clean, biological tool derived from naturally occuring soil bacteria. * No Harvest Interval: Can be applied up to the day of harvest in many professional settings...
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9.6
Superb
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9.6
Superb
Generic
Boxtree Caterpillar (Xentari) Rescue 50g
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Main Highlights
Why Professionals choose this - * Immediate feeding inhibition: Target larve stop feeding within minutes of indegestion, providing instant protection for your foliage, 500m2 coverage (Appx) depending on dosing. * Superior strain potency: Specifically selected for its effectiveness against "Tough" species like Armyworms and Diamondback Moths which may resist standard treatments. * Pollinator-Safe Microbiology: Zero impact on Bees, Ladybird(Bug), or predatory mites when used as described. * Organic Compatibility: A clean, biological tool derived from naturally occuring soil bacteria. * No Harvest Interval: Can be applied up to the day of harvest in many professional settings...
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4
Dragonfli Box Tree Caterpillar Killer Nematodes - Protect Buxus Hedges Naturally - Covers 35sqm
Dragonfli
Why we love it
Natural and safe for all.
Easy to apply and store.
No risk of plant damage.
Main Highlights
Supplied as 2 packs of nematodes, each pack can treat 35sqm and should be applied 7 days apart
Totally natural nematode solution is safe for the environment, pets and family
Multiple applications can be stored in a fridge for up to 6 weeks to ensure application at the correct time
Easy to apply, just add water and spray or water onto hedge, full instructions provided
Cannot overdose or damage the plant, simply apply as many applications as necessary to knock back caterpillar populations
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9.6
Superb
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9.6
Superb
Dragonfli
Dragonfli Box Tree Caterpillar Killer Nematodes - Protect Buxus Hedges Naturally - Covers 35sqm
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Why we love it
Natural and safe for all.
Easy to apply and store.
No risk of plant damage.
Main Highlights
Supplied as 2 packs of nematodes, each pack can treat 35sqm and should be applied 7 days apart
Totally natural nematode solution is safe for the environment, pets and family
Multiple applications can be stored in a fridge for up to 6 weeks to ensure application at the correct time
Easy to apply, just add water and spray or water onto hedge, full instructions provided
Cannot overdose or damage the plant, simply apply as many applications as necessary to knock back caterpillar populations
Show More
5
Boxtree Caterpillar (Xentari) Rescue (25g)
Generic
Main Highlights
Why Professionals choose this - * Immediate feeding inhibition: Target larve stop feeding within minutes of indegestion, providing instant protection for your foliage, 250m2 coverage (Appx) depending on dosing. * Superior strain potency: Specifically selected for its effectiveness against "Tough" species like Armyworms and Diamondback Moths which may resist standard treatments. * Pollinator-Safe Microbiology: Zero impact on Bees, Ladybird(Bug), or predatory mites when used as described. * Organic Compatibility: A clean, biological tool derived from naturally occuring soil bacteria. * No Harvest Interval: Can be applied up to the day of harvest in many professional settings.
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9.4
Superb
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9.4
Superb
Generic
Boxtree Caterpillar (Xentari) Rescue (25g)
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Main Highlights
Why Professionals choose this - * Immediate feeding inhibition: Target larve stop feeding within minutes of indegestion, providing instant protection for your foliage, 250m2 coverage (Appx) depending on dosing. * Superior strain potency: Specifically selected for its effectiveness against "Tough" species like Armyworms and Diamondback Moths which may resist standard treatments. * Pollinator-Safe Microbiology: Zero impact on Bees, Ladybird(Bug), or predatory mites when used as described. * Organic Compatibility: A clean, biological tool derived from naturally occuring soil bacteria. * No Harvest Interval: Can be applied up to the day of harvest in many professional settings.
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6
Box Tree Caterpillar Nematodes 30sqm x 2 Treatments Includes Nematode Applicator
Gardening Naturally
Why we love it
Natural defense against infestations.
Controls water flow effectively.
Maintains healthy garden ecosystem.
Main Highlights
Premium box tree caterpillar nematodes for natural defense against infestations. Apply in the evening during overcast or during rainfall.
Adjust the spray head using the side tab for water flow control and turn it 90 degrees for full flow. The pouch empties in 3-4 minutes, full application of this product for 60sqm roughly takes 8 minutes.
Combat damage with consistent application every six weeks, when applying to lawns, ensure the soil/lawn is kept moist with regular watering for up to 2 weeks.
Ensure water and nematode solution is shaken in the applicator before use. Applicator spray head must be attached and connected to a hose using the standard hose connector provided.
Perishable product with a shelf life of approximately 2 weeks, store between 4 to 10°C
Effective solution without harmful chemicals, ensuring a healthy garden ecosystem
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9.2
Superb
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9.2
Superb
Gardening Naturally
Box Tree Caterpillar Nematodes 30sqm x 2 Treatments Includes Nematode Applicator
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Show More
Why we love it
Natural defense against infestations.
Controls water flow effectively.
Maintains healthy garden ecosystem.
Main Highlights
Premium box tree caterpillar nematodes for natural defense against infestations. Apply in the evening during overcast or during rainfall.
Adjust the spray head using the side tab for water flow control and turn it 90 degrees for full flow. The pouch empties in 3-4 minutes, full application of this product for 60sqm roughly takes 8 minutes.
Combat damage with consistent application every six weeks, when applying to lawns, ensure the soil/lawn is kept moist with regular watering for up to 2 weeks.
Ensure water and nematode solution is shaken in the applicator before use. Applicator spray head must be attached and connected to a hose using the standard hose connector provided.
Perishable product with a shelf life of approximately 2 weeks, store between 4 to 10°C
Effective solution without harmful chemicals, ensuring a healthy garden ecosystem
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7
Grouzvei Box Tree Caterpillar Treatment -10 x 5g Packs, 300㎡ Total Coverage - Individually Wrapped,Safe for Bees & Birds, Supports Healthy Buxus Hed
Grouzvei
Why we love it
Covers large garden areas easily.
Long shelf life for convenience.
Safe formula for wildlife protection.
Main Highlights
Covers up to 300㎡ – You’ll get 10 handy 5g sachets, each one treating around 30㎡ of your garden. All individually wrapped to keep them fresh, giving you a total of 300㎡ coverage.
Individually packaged, Long Shelf Life—each bag contains 5g and mixes with 2 liters of water. Only one bag needs to be opened at a time,not waste. Stays potent for 3+ years when stored cool and dry! With protection for all seasons.
Easy to Mix—This formula dissolves easily in water, and the powder dissolves quickly. Simply mix, shake, and spray. Simply coat both sides of the leaves. Tip: Apply in the early morning or evening for best results.
Fast-Acting Formula—Fast action in just 1 hour! To keep your hedges in good shape, reapply every 7–10 days or after heavy rain.
Safe for Wildlife—Made with natural, plant-based ingredients—Safe for bees, birds, pets, and people, while also being kind to the environment.
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9.0
Superb
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9.0
Superb
Grouzvei
Grouzvei Box Tree Caterpillar Treatment -10 x 5g Packs, 300㎡ Total Coverage - Individually Wrapped,Safe for Bees & Birds, Supports Healthy Buxus Hed
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Show More
Why we love it
Covers large garden areas easily.
Long shelf life for convenience.
Safe formula for wildlife protection.
Main Highlights
Covers up to 300㎡ – You’ll get 10 handy 5g sachets, each one treating around 30㎡ of your garden. All individually wrapped to keep them fresh, giving you a total of 300㎡ coverage.
Individually packaged, Long Shelf Life—each bag contains 5g and mixes with 2 liters of water. Only one bag needs to be opened at a time,not waste. Stays potent for 3+ years when stored cool and dry! With protection for all seasons.
Easy to Mix—This formula dissolves easily in water, and the powder dissolves quickly. Simply mix, shake, and spray. Simply coat both sides of the leaves. Tip: Apply in the early morning or evening for best results.
Fast-Acting Formula—Fast action in just 1 hour! To keep your hedges in good shape, reapply every 7–10 days or after heavy rain.
Safe for Wildlife—Made with natural, plant-based ingredients—Safe for bees, birds, pets, and people, while also being kind to the environment.
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8
Green Guard Box Tree Caterpillar Treatment 50g – Fast-Acting, Revive Your Buxus Hedge, for Boxwood & Buxus – Safe for Bees, Birds & Pets – Treats 300m² – Easy Box Blight Treatment Garden Solution
Green Guard
Why we love it
Quick relief for hedge.
Safe for bees and pets.
Easy mixing for home use.
Main Highlights
FAST-ACTING PROTECTION FOR BUXUS - Our formula begins working in under an hour, quickly reversing visible caterpillar damage and helping your box hedge recover with minimal effort.
NOT POLLINATORS - Specifically targets box tree caterpillars while remaining safe for bees, birds, and pets. A reliable, non-toxic box caterpillar treatment for any garden. Pesticide-Free Solution
SIMPLE MIXING, ACCURATE APPLICATION - Just mix 5g with 2L of water to treat 30m². Includes a measuring spoon to ensure precision and hassle-free application, every time.
LARGE COVERAGE, LONG SHELF LIFE - Each 50g pack treats up to 300m² and lasts for over 3 years in storage. Perfect for long-term box hedge caterpillar treatment with lasting value.
TRUSTED BY GARDENERS, BACKED BY CARE - At Green Guard, we believe in safe, effective solutions. Our UK-tested formula is trusted by gardeners and supported by a team who genuinely care.
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8.8
Excellent
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8.8
Excellent
Green Guard
Green Guard Box Tree Caterpillar Treatment 50g – Fast-Acting, Revive Your Buxus Hedge, for Boxwood & Buxus – Safe for Bees, Birds & Pets – Treats 300m² – Easy Box Blight Treatment Garden Solution
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Show More
Why we love it
Quick relief for hedge.
Safe for bees and pets.
Easy mixing for home use.
Main Highlights
FAST-ACTING PROTECTION FOR BUXUS - Our formula begins working in under an hour, quickly reversing visible caterpillar damage and helping your box hedge recover with minimal effort.
NOT POLLINATORS - Specifically targets box tree caterpillars while remaining safe for bees, birds, and pets. A reliable, non-toxic box caterpillar treatment for any garden. Pesticide-Free Solution
SIMPLE MIXING, ACCURATE APPLICATION - Just mix 5g with 2L of water to treat 30m². Includes a measuring spoon to ensure precision and hassle-free application, every time.
LARGE COVERAGE, LONG SHELF LIFE - Each 50g pack treats up to 300m² and lasts for over 3 years in storage. Perfect for long-term box hedge caterpillar treatment with lasting value.
TRUSTED BY GARDENERS, BACKED BY CARE - At Green Guard, we believe in safe, effective solutions. Our UK-tested formula is trusted by gardeners and supported by a team who genuinely care.
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9
Habitat Harvest, Buxus Support, Box Tree Hedge Rescue Formula | Safe for Bees, Birds & Pets | 50g Treats up to 300m² | Fast-Acting Recovery Support for Box Hedges
HABITAT HARVEST
Why we love it
Fast-acting box tree protection.
Safe for bees and pets.
Easy mixing, precise application.
Main Highlights
FAST-ACTING BUXUS RESTORE Our formula gets to work in under an hour, helping to restore balance in your buxus and supporting your plants as they recover from the tell-tale signs of damage — with minimal effort from you.
SAFE FOR WHAT MATTERS Formulated to tackle the source of box hedge decline without harming the wider garden. Safe for bees, birds, butterflies and pets — a responsible choice for gardeners who care about the bigger picture.
SIMPLE MIXING, ACCURATE APPLICATION Just mix 5g with 2L of water to cover 30m². Includes a measuring spoon for precise, hassle-free application every time.
GREAT COVERAGE, LONG SHELF LIFE Each 50g pack covers up to 300m² and remains effective for over 3 years in storage. Exceptional long-term value for keeping your box hedges protected and thriving season after season.
TRUSTED BY GARDENERS, BACKED BY CARE At Habitat Harvest we believe in safe, effective solutions for every garden. Our UK-tested formula is trusted by gardeners who know the heartbreak of damaged buxus, supported by a team who genuinely care about your plants.
Rescue and Restore
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8.7
Excellent
Check Price
8.7
Excellent
HABITAT HARVEST
Habitat Harvest, Buxus Support, Box Tree Hedge Rescue Formula | Safe for Bees, Birds & Pets | 50g Treats up to 300m² | Fast-Acting Recovery Support for Box Hedges
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Show More
Why we love it
Fast-acting box tree protection.
Safe for bees and pets.
Easy mixing, precise application.
Main Highlights
FAST-ACTING BUXUS RESTORE Our formula gets to work in under an hour, helping to restore balance in your buxus and supporting your plants as they recover from the tell-tale signs of damage — with minimal effort from you.
SAFE FOR WHAT MATTERS Formulated to tackle the source of box hedge decline without harming the wider garden. Safe for bees, birds, butterflies and pets — a responsible choice for gardeners who care about the bigger picture.
SIMPLE MIXING, ACCURATE APPLICATION Just mix 5g with 2L of water to cover 30m². Includes a measuring spoon for precise, hassle-free application every time.
GREAT COVERAGE, LONG SHELF LIFE Each 50g pack covers up to 300m² and remains effective for over 3 years in storage. Exceptional long-term value for keeping your box hedges protected and thriving season after season.
TRUSTED BY GARDENERS, BACKED BY CARE At Habitat Harvest we believe in safe, effective solutions for every garden. Our UK-tested formula is trusted by gardeners who know the heartbreak of damaged buxus, supported by a team who genuinely care about your plants.
Rescue and Restore
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10
Box Tree Caterpillar Nematodes
Nemasys
Why we love it
Effective caterpillar control solution.
Repeated applications ensure success.
Ideal for Box Tree protection.
Main Highlights
To control Box Tree Caterpillar spray with NemaMix Fruit and Vegetable Nematodes when the caterpillars are spotted and the DAYTIME temp is 12c.
These caterpillars are becoming a BIG problem as they feed on box plants causing severe defoliation and produce large amounts of webbing. As the caterpillars feed, areas of dieback may appear, which will be especially apparent on trimmed plants.
Box Tree Caterpillars are greenish-yellow with black heads and once fully grown the caterpillars reach up to 4cm in length and will have a thick black and thin white stripes along its body.
We supply 3 sachets of nematodes, which are applied 3 times at 7 day intervals. These Box Tree Nematodes work at daytime temperatures above 12°C/40°F, so apply during the growing season i.e. between March and October / November (it does not matter if it drops below this at night).
Each sachet treats 60 sqm and we supply 3 packs so you can go over the SAME area 3 times at weekly intervals - this makes sure you kill all the caterpillars. Box Tree Caterpillar Nematodes are a living, perishable product (it will keep for 2 weeks in the fridge), so order when you are ready to apply and the caterpillars are present.
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8.7
Excellent
Check Price
8.7
Excellent
Nemasys
Box Tree Caterpillar Nematodes
Check Price
Show More
Why we love it
Effective caterpillar control solution.
Repeated applications ensure success.
Ideal for Box Tree protection.
Main Highlights
To control Box Tree Caterpillar spray with NemaMix Fruit and Vegetable Nematodes when the caterpillars are spotted and the DAYTIME temp is 12c.
These caterpillars are becoming a BIG problem as they feed on box plants causing severe defoliation and produce large amounts of webbing. As the caterpillars feed, areas of dieback may appear, which will be especially apparent on trimmed plants.
Box Tree Caterpillars are greenish-yellow with black heads and once fully grown the caterpillars reach up to 4cm in length and will have a thick black and thin white stripes along its body.
We supply 3 sachets of nematodes, which are applied 3 times at 7 day intervals. These Box Tree Nematodes work at daytime temperatures above 12°C/40°F, so apply during the growing season i.e. between March and October / November (it does not matter if it drops below this at night).
Each sachet treats 60 sqm and we supply 3 packs so you can go over the SAME area 3 times at weekly intervals - this makes sure you kill all the caterpillars. Box Tree Caterpillar Nematodes are a living, perishable product (it will keep for 2 weeks in the fridge), so order when you are ready to apply and the caterpillars are present.
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