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The evergreen shrub laurustinus, Viburnum tinus, can be affected by a small sap sucking insect known as the viburnum whitefly.
Viburnum whitefly is a common sap-sucking insect found on the underside of the leaves on Viburnum tinus and sometimes on strawberry trees, Arbutus spp. This insect should not be confused with other species of whitefly such as glasshouse whitefly which rarely affects these plants or cabbage whitefly which is only found on brassicas.
Check plants carefully for;
Light to moderate infestations can be tolerated and control should only be considered when plants are heavily infested and becoming soiled with sooty mould.
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Viburnum whitefly has one generation a year.
The adults emerge in mid-summer, when they deposit eggs on the underside of leaves near the shoot tips. These hatch into flat, oval whitish-green nymphs that suck sap from the lower leaf surface.
By autumn, the nymphs have reached the pupal stage, which is black and encrusted with a white waxy powder. Both adults and nymphs produce a sugary excrement, called honeydew, which makes the foliage sticky and can allow the growth of sooty moulds.
Chemical labels explained
Chemicals: using a sprayer
Chemicals: using safely and effectively
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