black fly has overtaken cherry trees what can i do?
By Markevans
United Kingdom 
For the past 3 years i have been growing stella cherry trees without success. They blossom but then are ridden by black fly. i have tried sraying them with bug off, but that does not work. one of the cherry trees leaves change colour from green with orange spots and curls up what is the problem, and what can i do so solve it?
On plant
stella cherry trees
1 Jun, 2009
Answers
what is the problem to my question i asked over ten days ago?
The stella cherry tree does not bare fruit, and is ridden by blackfly.
11 Jun, 2009
Maybe it's not getting pollinated sufficiently. Do you live very far north?
Sorry, about the time frame...we all have gardens and allotments etc to tend. Plus extra tricky questions are a bit more daunting to try and answer.
12 Jun, 2009
http://plant-disease.ippc.orst.edu/disease.cfm?RecordID=293
Try this web page. The rest of their site is good for disease info too. Doesn't sound very promising if this is the cause. The aphids have probably attacked it because it is suffering.
11 Jun, 2009