Aphids on Pyracantha
Whoolly Aphids can first seem like some sort of fungus but it is
actually a type of aphid that sucks sap from your Pyracantha. They are brownish
in colour but appear to be white and look a little like cotton wool giving it
the name `Whoolly Aphid`.
As they suck the sap from shrubs and trees it will cause lumps
to appear called knobbly galls on infected areas. Affected branches often need
pruning away as they rarely recover from the attack. If left untreated they
will kill a full grown plant leaving you no option but to remove it and plant
Any spray with Pyrethroids and Pyrethrin in will be effective.
The chemical content of pesticides can be found on the bottles of chemicals at
all garden centres and nurseries.