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vine weevil

Vine weevil

Keep a watchful eye for signs of vine weevil beetles nibbling the edges of leaves and their grubs who will be munching on roots below the surface.

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  • ©RHS Science

    Glasshouse thrips

    Thrips are small insects which can feed by sucking sap causing a fine silvery mottling of the upper leaf surfaces on many glasshouse plants and some which are grown outdoors in sheltered positions. Glasshouse thrips have recently become a frequent problem on outdoor plants such as Viburnum.

  • Glasshouse whitefly. Image: ©

    Glasshouse whitefly

    Glasshouse whitefly is a common sap-feeding insect, mainly of houseplants and greenhouse plants. They excrete a sticky substance (honeydew) on foliage, which allows the growth of sooty moulds.

  • Golden root mealybug © FERA/David Crossley

    Golden root mealybug

    The golden root mealybug, Chryseococcus arecae was first recorded in the UK in 2012. It is a native of New Zealand that unlike other root mealybug species found in Britain can be found on the roots of outdoor plants all year round.

  • Common gooseberry sawfly (Nematus ribesii) on Gooseberry (Ribes uva-crispa). Credit: RHS/Entomology

    Gooseberry sawfly

    The common gooseberry sawfly is one of several sawfly species that can attack gooseberry and red/white currant during spring and summer.

  • Grapevine blister mite underside of leaf

    Grapevine blister mite

    During the summer the foliage of grape vines can become distorted and the underside of the leaves covered with a dense coating of fine hairs caused by the feeding activities of a gall mite. This does not affect the overall health of the vine.

  • Common green shield bug (Palomena prasina). Credit: RHS/Entomology.

    Green shield bugs

    Two species of green shield bug now occur in Britain. The common green shield bug is native to Britain, and of widespread occurrence. The southern green shield bug is a recent arrival from elsewhere in Europe that became established in the London area in 2003.

  • Green spruce aphid (Elatobium abietinum) on Spruce (Picea pungens). Credit: RHS/Entomology.

    Green spruce aphid

    Unlike most aphids which are active during the spring and summer, the green spruce aphid is active during the winter months. It can cause needle drop on spruce trees (Picea species).

  • Grey squirrel. Image: ©

    Grey squirrels

    The grey squirrel is a common mammal that in gardens can both delight by its acrobatic movements and annoy by damaging trees, feeding on flower buds, bulbs, fruits and vegetables.

  • ©RHS SCN0004317

    Harlequin ladybird

    The harlequin ladybird, Harmonia axyridis is non-native it became established in the UK in 2004. It has become very widespread and has many colour forms, some of which can appear similar to native ladybirds.

  • Hellebore aphid (Macrosiphum hellebori) on Hellebore (Helleborus sp.). Credit: RHS/Entomology.

    Hellebore aphid

    One of the most important problems of hellebores is a sap feeding aphid or greenfly. It can cause a lack of vigour and unsightly, sooty mould on the leaves and flowers.

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