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Of the leaf beetle family, flea beetles are small, jumping insects, which feed mainly on root vegetable crops and brassicas.

Microscopic, unsegmented worms that resemble fine cotton threads. Many are parasitic and feed off plant roots.

An insect of the order Hymenoptera. They're considered a pest in the summer when they feed on ripe fruit.

Metallic element essential in the production of chlorophyll in plants. Magnesium deficiency can stunt development, but may be combated by an annual application of foliar feed.

An insect that looks like a wood louse, but which is coated in a pale, waxy substance. It feeds on plant sap, and is best controlled by systemic insecticide.

Slimy molluscs that feed by night on tender plants and some root crops. They can cause considerable destruction, and control takes many forms, from salting to the use of chemical pesticides.

A gastropod that has a coiled shell, and feeds on plants. It wreaks similar damage to slugs, and can be controlled in the same way too.

One of a number of species belonging to the order Collembola. These insect-like creatures feed on living or decaying vegetation, and can be a nuisance in greenhouses. They can be controlled using insecticide.

Aphid-like insects of the family Adelgidae that are found exclusively on conifers. They feed on the sap of the host tree and cause cone-like growths, which can stunt or kill twigs and, in severe infestations, disfigure ornamental trees.

A green or brown leaf-eating bug that feeds on the sap of young growth, causing damage to flowers and leaves. It commonly affects outdoor ornamental plants, such as caryopteris, chrysanthemum, clematis, dahlia, forsythia, fuchsia, hydrangea