The sawfly eggs are often laid in the middle of the bush and this is where
the first signs of damage are noticed.
to Treat Sawfly
The key to treating this pest is ACT QUICKLY! Wait a few days
and it's tooo late! If you are really kind to the environment,
pick the caterpillars off by hand and do this at least daily.
Anything which encourages birds to the affected area will also
help - robins especially love sawfly.
realistic though, the best method is to spray with an
insecticide immediately the disease is noticed.