2006-08-03 19:20:29 · 2 answers · asked by gordon58benson 1 in Home & Garden ➔ Other - Home & Garden
They are scale insects - possible the Horse Chestnut Scale (see link) or something similar. They don't harm the tree but you could probably clear them by washing or spraying with soapy water or a mixture of water, soap and paraffin.
http://www.rhs.org.uk/advice/profiles0602/chestnut_scale.asp
2006-08-03 21:50:11 · answer #1 · answered by Owlwings 7 · 1⤊ 0⤋
Sounds like Horse Chesnut Scale. This is a pest.
The white powdery residue are the eggs laid by the pest which hatch mid/late summer - SOON. Try and scrape of as much of the white powdery scale as you can. You can also spray the Bay with 'IMIDICLOPRID' available from garden centres/DIY/nurseries etc. The pest is a sap feeder. Young and immature plants may suffer some wilting but mature plants won't be bothered by them.
2006-08-04 09:11:58 · answer #2 · answered by Anonymous · 0⤊ 0⤋