How to treat aphid
Aphids are a very common insect which can suck the sap on both indoor and outdoor bonsai trees, and most other plants. Both greenfly and blackfly are common examples of aphid.
We have had more e-mails this spring about aphid than ever before. I’m not sure if this is because it has been warmer and they are just more prevalent!
Symptoms of Aphid.
Usually the first symptom of aphid on a bonsai tree is that you notice a sticky residue on some of the leaves. This is the ‘honeydew’ from the insect and sometimes a black sooty mould will develop as a result.
If you look closely you may be able to see small black or green flies underneath the leaves. When the aphids shed their skins and moult they can leave white skins on the leaves or soil.
Aphids can cause stunted growth or distorted and curled leaves on a bonsai. This can affect the health and weaken the bonsai so it is important to treat this pest.
We spray weekly with a plant invigorator as a preventative measure. This is an environmentally friendly product and is very effective.
However, if you are trying to treat aphids you may find a general insecticide is more effective; especially in the short term. Aphid is a very easy pest to treat with insecticides. These are available from most garden centres and are extremely effective.
Please follow the manufacturers instructions but a repeat spray will be necessary to ensure any eggs which hatch are also treated.
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