The most common of all pests and almost every plant from the smallest shrub to the tallest oak tree can be infested at one time or another.
The little bugs feed on the sap of the plant weakening it and reducing its rate of growth. They can also transmit a virus to the plant. Plant leaves can become curled or distorted.
The Aphid colonies gather on the undersides of the leaves and as they suck the sap, so they excrete a sugary honeydew onto the leaves below - developing a shiny glaze. Particularly in damp conditions, a sooty mould will grow on the honeydew glaze which is not only unsightly but will gradually deprive the leaf of light and eventually the plant will die.
Aphids also shed their skins as they increase in size. Cast off skins also gather on the leaf surfaces below forming a whitish dust.
Treatment and control
Spray with a natural-based insecticide: Pyrethrin (an natural plant extract) based insecticides will control Aphids and other plant pests. An example is BugClear Gun! for Fruit & Veg. For best results spray thoroughly as pyrethrins kill on contact.Spray with a general insecticide
Most broad-spectrum insecticides will control Aphids. Examples are BugClear Ultra Gun! for ornamental plants and certain listed fruit and vegetable crops (see the list on the product label) or BugClear Gun! for Fruit & Veg for all edible plants. BugClear Ultra is a systemic insecticide that kills very quickly on contact and also protects the plant for up to 3 weeks.