
How to recognize Hydrangea scale
Young stages of Hydrangea scale are light brown and flat. Adult stages are round and more swollen. From June and July remarkable white egg sacs become visible. There is only one generation per year in which a single female can produce up to 1000 new scales. Depending on the season, young stages can be found on the leaf, petiole or branch. Adult stages are usually found on the underside of the leaves.
Hydrangea scale damage
Damage by the Hydrangea scale ismainly cosmetic. During heavy infestations, large amounts of honeydew are produced. The honeydew acts as a growth medium for black sooty mold fungus which will turn the leaves black. Thiscan hamper photosynthesis.
Products against hydrangea scale
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COCCOPHAGUS SCUTELLARIS - 25
Vendor:Entocare eigen kweekRegular price €32,67 EURRegular priceUnit price / per -
EXOCHOMUS QUADRIPUSTULATUS larvae - 50
Vendor:Entocare eigen kweekRegular price €32,50 EURRegular priceUnit price / per€32,50 EURSale price €32,50 EUR -
EXOCHOMUS QUADRIPUSTULATUS adults - 25
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Life cycle Hydrangea scale
1000 eggs per female
young stages light brown, adult stages rounded
from June and July egg masses visible
young stages on leaf, petiole or branch
adult stages on underside of leaf -
Host plants Hydrangea scale
hydrangea
maple
linden, Platanus
magnolia
viburnum
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Hydrangea dopluis close up
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Hydrangea scale on Hortensia