By Huffmaling
Gloucestershire,
United Kingdom 
What is the best way of getting rid of blackfly on my dahlias?
30 Jun, 2015
Answers
Thankyou.
30 Jun, 2015
You're welcome
30 Jun, 2015
Black fly is another form of aphid. You can spray them off with a garden hose, use horticultural soap or predator bugs like ladybird/bug or lacewing.
30 Jun, 2015