What can I do about flies on hydrangeas?

Answer by  terry82 (191)

Generally there isn't too much you can do about flies on hydrangeas. Any spray that you would use to control flies would be a contact kill. You would kill whatever is hit by the insecticide but there would be little if any residue that would prevent them from coming back.

Answer by  mammakat (11147)

This would appear to be the white fly, which is quite a pest. They have become resistant to a lot of pesticides. Remove heavily infested leaves and consult your local garden center for their recommendation. Lady bugs are often helpful as are some species of spiders, you can buy beneficial insects to help infestation.

Answer by  worker8739 (555)

They may be white flies, as soon as you touch the plant they will fly up in like a cloud effect, then settle right back in. Try using a very mild soap mixture, in a spray bottle filled with water and a very small amount of detergent.

Answer by  MattK (1713)

Flies, like most insects are attracted to different odors. The hydrangea has an odor which is very attractive to flies and other insects. The reason for this is that the hydrangea is a flower and the job of flowers is to produce odors in order to attract insects such as bees and unfortunately flies. Get bug spray.