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Of the black, red and yellow ants that are commonly seen in the garden, only the red ones (from the Myrmica species) sting. Other than that, ants are more of a nuisance than a pest. They feed mostly on insects, including other ants, and honeydew

. The adults have six legs and a pair of antennae, moving in the open at night, chewing the edges of leaves. This isn't itself a problem, but the fact that each adult is a female, laying almost 1,000 eggs in summer, is alarming.Holes and notches chewed out

The larval form of a Lepidopteran. They are voracious phytophagous feeders and considered a pest.

An insect that attacks plant roots. This pest can be controlled using pesticides.

A covering (traditionally bell-shaped) for the protection of plants from cold temperatures, frost, birds and pests.

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

Sap-sucking insects of the family Aleyrodidae. A particular pest of the greenhouse, whitefly can be very destructive.

A means by which a selected natural mechanism (eg, parasitism, predation, disease) is used to control pests. Has the advantage of minimising the legal, health and environmental hazards associated with chemical control.

Click beetle larvae that live in the soil. They're a pest that attacks the roots of many crops, including tubers and bulbs.

Learn environmentally friendly methods for controlling aphids, and other garden pests with Monty's guide to organic insecticides and how they work. Monty also talks you through how to make your own, organic pesticide.summerAdvice on aphids and other