Plants can become easily overrun by a variety of pests, including aphids. These are small bugs from the Aphidoidea family. They primarily attach themselves to plants, feeding on the sap found within them. The aphid comes in a variety of colours, including yellow, pink, white, and mottled. There are currently more than 500 species of aphid in Britain alone.
There are several symptoms of an aphid infestation. You can spot the aphid with the naked eye; check the shoot tips, flower buds, and the underside of younger leaves for an infestation. Leaves can become curled or distorted. Black moulds can grow on the plant as a result of honeydew excrement. Ants may also climb plants colonised by aphids.
Neem oil is an effective and eco-friendly treatment for aphids on a range of plants, including bamboo. It is also biodegradable and non-toxic. You can use a neem oil spray or a soil drench. If aphids have infested tall trees, however, then there may be little you can do to remove them, as the entire tree would need to be sprayed. Reapply neem oil regularly to ensure plants are treated effectively.