Rosemary beetle

Time to act:

Sep, Oct, Nov, Aug

Purple-striped green beetles, 8mm long, congregate among the leaves, which they feed on. The beetles lay elongated eggs beneath the leaves from September and continue to do so on warm days right through winter. These hatch after a couple of weeks and the larvae feed on the plants for about three weeks before entering the soil to pupate. Two weeks later the adults emerge and continue munching through the leaves and laying their eggs.


Holes in leaves and tiny elongated eggs left by 8mm-long green beetles with purple stripes.

Find it on

rosemary, lavender, sage, Russian sage, thyme



Pick off the adult beetles and larvae by hand and destroy.


Spray with an insecticide, thiocloprid, between late summer and spring. Avoid using insecticide when the plants are in flower as bees may also be killed.


Discover more ideas and inspiration

Related content


Bay leaf suckers

Capsid bugs

Cuckoo spit

Related offers


Save 15% on bee houses

Attract beneficial pollinating bees and insects to your garden by providing them with luxury accommodation. This week only, you'll save 15 per cent on a selection of bee houses from GardenBird when you enter our offer code.

Use code: BEE15

Order now

SAVE 20%

Subscriber only content

Save 20% on all pots

Subscribers save 20 per cent on the fantastic range of garden pots and containers, including a great choice of herb planters, at Simply enter the offer code at checkout to claim your discount. Offer ends at midnight on Friday 2 June, 2017.

Unlock now


Save on lavenders

Attract bees and butterflies to your garden with lavender 'Imperial Gem'. You can buy nine cutting-raised plug plants for £9.99, or save £7 when you buy 18 for just £12.98. You'll also get free p&p with this offer.

Order now