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Caterpillars

By Gardeners' World on 18/10/2011 14:39:30

Hungry, voracious caterpillars can be found in a wide variety of colours and sizes. Some feed on fruits, roots and stems, but the likes of the cabbage white butterfly, hawk moth and winter moth feed on leaves. Although they may at first seem an attractive form of wildlife, large ...


Currant blister aphids

By Gardeners' World on 18/10/2011 14:43:39

Sap-sucking aphids are problematic for currant bushes. In spring, they cause the foliage to become blistered and puckered, as well as discolouring areas, leaving yellowish-green or red patches. The aphids then fly to hedge woundwort, a wildflower, for the rest of the summer, but ...


Earwigs

By Gardeners' World on 18/10/2011 15:01:49

Earwigs, which can be up to 14mm long, hide during the day and emerge at night to feed. The females lay eggs in late-winter, usually in the soil, which hatch in spring. Although earwigs can damage plants, they also eat small pests and their eggs


Pea and bean weevils

By Gardeners' World on 18/10/2011 15:42:11

Pea and bean weevils are a nuisance but rarely a major problem on the veg patch. The larvae live in the soil and feed on the root nodules. Then when the adults emerge in June and July, they climb up the plants and eat the edges of the leaves. Thankfully, these 4mm-long, brown, sn...


Primula leaf spot

By Gardeners' World on 19/10/2011 13:57:14

Spores carried by water and wind spread this fungus, which leaves primula foliage peppered with holes. The initial signs are spots in a yellow-orange area, or in grey, papery tissue. When the centre falls out, holes appear. Look beneath the leaves and there may also be white fung...


Reversion

By Gardeners' World on 19/10/2011 14:00:12

Sometimes shoots appear on previously plain-leaved plants with attractive variegations, and these can then be propagated by nurserymen to make a new plant. But the new variegated plant might try to revert to all-green foliage because the mutation isn't stable. If left, this all-g...


How to trim a conifer hedge

By Gardeners' World on 19/07/2011 15:03:58

hedge thoroughly before trimming it to ensure there are no birds nesting within. It is an offence under the Wildlife and Countryside Act 1981 to damage or destroy the nest of any wild bird while it is in use or being built.Conifer hedgeElectric or petrol


Apple and pear scab

By Gardeners' World on 10/10/2011 11:34:22

Apple and pear scab is most prevalent in mild, damp seasons. The fungus overwinters on fallen leaves in the form of spores, which can be splashed by rain or carried in the wind to infect newly emerged shoots in spring. Overwintering can also occur on infected stems and branches. ...


Clematis wilt

By Gardeners' World on 18/10/2011 11:03:01

Clematis wilt is caused by a fungus that enters the plant through a wound made by an insect or an abrasion, such as rubbing from a plant tie. It's spread by water splash, and blocks the uptake of water in the stems, causing instant collapse. Infected foliage must be disposed of i...


Aphids

By Gardeners' World on 18/10/2011 11:18:16

of the plant, attracting black sooty mould, which inhibits photosynthesis and deprives the plant of energy.Young tender growth is vulnerable to aphid attack. These tiny insects (1mm-7mm long) are usually green or black and breed fast, smothering the plant


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