David Shalita wrote:
How can I prevent black flies from living on a Gardena Bush? Safer soap
sppray is not helpful.

At one time, this plant had black fungus, but the
Bayer company systemic food has eliminated any reoccurance.

What can I spray to discourage black flies?

Thanks, Dave

I used to treat black fungus and tiny flies (I don't remember what color
they were) with dormant oil spray, at one-half strength. The bottle should
have directions for use as a "summer oil spray".

Best regards,
Bob

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