Pests

Get expert help from the RHS to deal with pests and other problems

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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  • Viburnum whitefly

    Viburnum whitefly

    The evergreen shrub laurustinus, Viburnum tinus, can be affected by a small insect known as the viburnum whitefly.

  • An adult wine weevil feeding on a rhododendron. Image: RHS, Horticultural Science

    Vine weevil

    Vine weevil is an insect that can infest a wide range of ornamental plants and fruits, especially those grown in containers. Adult vine weevils eat leaves and the grubs eat roots.

  • Common wasps feeding on pear fruit

    Wasps (social) including hornets

    Wasps are beneficial in gardens, they feed their grubs on caterpillars and other insects and can reduce pest populations.Wasps can also ruin picnics during mid to late summer and may also damage ripe fruits. Disturbing a wasp nest when weeding or hedge trimming can result in multiple painful stings. 

  • ©RHS_SCN0004006

    Waterlily pests

    The leaves of waterlilies can be affected by aphids, moth larvae, beetles or midges which can give them a ragged appearance and lead to secondary rots.

  • ©RHS_SCN0005172

    Willow leaf beetles

    The feeding activities of bronzy green or bluish black beetles and their black larvae can cause foliage of willows, aspen and poplars to dry up and turn brown.

  • Winter moth caterpillar and leaf damage to cherry leaves. Image: RHS, Horticultural Science

    Winter moth caterpillars

    Winter moth caterpillars can be responsible for eating holes in the leaves of many deciduous trees and shrubs during spring.

  • ©RHS SCN0006343

    Wireworms

    Wireworms are the larvae of click beetles. They live in the soil and feed on plant roots, they usually only cause problems when grassy areas are converted to vegetable beds.

  • © RHS / Mike Sleigh (RHS_PUB0018105)

    Wisteria problems: frequently asked questions

    Wisteria is one of the quintessential cottage garden plants, with a chocolate-box image of spectacular blooms adorning the front of a country cottage. It is actually a very versatile plant and lends itself to a variety of situations, including growth in containers. Of the few problems affecting the plant, non-flowering and sudden dieback are probably the most frustrating.

    Here we give answers to many of the common problems encountered. They are grouped by the area of the plant affected: shoots; leaves and flowers.

  • Wisteria scale (Eulecanium exrescens). Credit: RHS/Entomology.

    Wisteria scale

    Wisteria scale is a sap sucking insect that was first found in the UK in a London garden in 2001. Since then it has spread but remains mainly a problem in London and the surrounding areas.

  • Woodlice

    Woodlice

    Woodlice, also known as slaters and pillbugs, are abundant animals in most gardens and greenhouses. They cause little or no damage to plants. Large numbers often occur in compost heaps, where they help break down the plant material and are a useful part of the composting process.

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