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Bay sucker can spoil the appearance of a bay tree by causing discoloration and distortion of leaves at the shoot tips.
Bay sucker. RHS/Science.
Bay sucker is a small sap-sucking insect that attacks the foliage during the summer. It is the nymphs that cause most of the damage.
Bay sucker can affect the appearance of bay but does not usually reduce the vigour of bay plants.
Pesticides for gardeners (Adobe Acrobat pdf document outlining pesticides available to gardeners)
The damage is caused by the nymphal stages of the bay sucker when they suck sap from the young leaves during the summer.
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