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vulnerable to attack, so protect them by waiting until they're a good size before planting out. Exploit the beetles' habit of jumping and catch them with a sticky trap. Coat a piece of card with grease, such as insect barrier glue, leaving a clean strip along
to feed. After 2-3 weeks, the larvae pupate inside the leaves and emerge as adults. The damage is mostly cosmetic but where many leaves are affected, the plant may be weakened or die. Different species of leaf miner fly affect specific plants.A maze
Scarlet beetles (6mm - 8mm long) with black heads eat the leaves, flowers and seedpods of lilies and other members of the lily family. Don't mistake them for ladybirds. Between April and September the beetles lay eggs on the undersides of leaves. After a week they hatch into redd...
of plants. They debilitate the plants and secrete a sticky, sugary honeydew that covers the leaves, which often results in further problems, such as sooty moulds. Infestations of white, waxy insects on indoor and greenhouse plants, along with sticky honeydew
, and can be picked off by hand.The moment you spot an infestation, spray them with pyrethrum. If the plants are in flower, spray in the evening, so pollinating insects aren't affected.verbascum, buddleia, figwortsmid-spring to midsummerMore advice
. 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 caterpillars of both the small and large cabbage white butterflies are are the two culprits. The first is pale green with a body up to 2.5cm long, the second is bigger at 4cm and is yellow with black markings. The adult butterflies lay eggs
In spring and summer, pollen beetles fly in from nearby oilseed rape crops to gather in open flowers where they feed on ripe pollen. Mostly, the beetles do little harm although occasionally they may nibble into unopened flower buds and damage the developing flowers of cauliflower...
These miniscule sap-sucking insects multiply rapidly on leaves. Large colonies are immediately evident, as are the symptoms - silvery-white discoloration of the leaves and distorted shoot tips and buds.Packed clusters of tiny white insects on leaves
These tiny, sap-sucking pests may be only 0.5mm long but they can wreak havoc in a greenhouse or on houseplants indoors. For most of the year they are a pale green colour with two dark spots on their back; it's only in autumn and winter