Insects can cause a range of problems, from contaminating your food crops to damaging your plants, even your property. Some species, like woolly beech aphid and woolly aphid on apple, cover themselves with a white waxy secretion and can be confused with some scale insects, mealybug or whitefly.

Vine weevil / RHS Gardening Vine weevil / RHS Gardening

The adults of these other species cause similar damage but in gardens are usually less problematic as larvae. In a heated greenhouse, vine weevils can feed and breed throughout the year, so all stages of the life cycle can be found. Many aphids, especially those on fruits and vegetables, go through an annual cycle that involves two or more host plants. This is why it’s important to take insect infestations seriously and deal with them promptly and effectively. More serious is the damage can becaused by the soil-dwelling larvae, which are plump, white, legless grubs up to 10mm (about 3/8in)long with pale brown heads.This makes August and September the most effective application period, though you can apply in April or May before the adult weevils emerge from their pupae if it is warm enough. If you do decide to control aphids, these are the ways you can cause least harm to the environment and avoid pesticides. Where you cannot tolerate aphids, manage them using the information above as your first course of action.

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Robert Dyas Holdings Limited T/A Robert Dyas is an appointed representative of Product Partnerships Limited which is authorised and regulated by the Financial Conduct Authority (FRN 626349). As a rule, this happens in August and September, though a lot depends on the weather during the previous winter and spring. While this insecticide is effective against a wide range of insects, it may not be suitable for all situations.This means that once the product has been applied, it can continue to provide protection against insects for several weeks. Honeysuckle thrips ( Thrips flavus) Found on many garden plants but is most frequently found on honeysuckle during May to October. Some aphids are known as greenfly or blackfly,but there are species that are yellow, pink, white or mottled. Plants growing in pots and containers, outdoors or under cover, are most likely to be severely damaged by vine weevil grubs.

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They are availablefrom suppliers of biological controls and as sachet formulations available from some retail outlets. Most aphid species overwinter as eggs but some can remain as active aphids, particularly in mild winters or on indoor plants. Leaves fed upon by thrips often become dull green and later develop a silvery-white discolouration on the upper surface.Kills aphids, red spider mites, whitefly, scale insects, caterpillars, lily beetles, leaf hoppers, mites and mealy bugs. It is effective against a wide range of common insect pests including: aphids, red spider mite, whitefly, scale insects, caterpillars, lily beetles, leaf hoppers, mites and mealy bugs. Encourage the natural enemies of aphids in your garden, such as ladybirds, ground beetles, hoverflies, parasitoid wasps and earwigs. Winged forms develop when overcrowding,deterioration in the host plant or seasonal changes induce amove to another plant. Flower petals are marked by a white flecking where the pigments have been lost and heavy feeding damage may prevent flower buds from opening.

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Plant invigorators that combinenutrientsto stimulate plant growth with surfactants or fatty acids also have a physical mode of action against aphids (e.Pesticide control The RHS believes that avoiding pests, diseases and weeds by good practice in cultivation methods, cultivar selection, garden hygiene and encouraging or introducing natural enemies, should be the first line of control.