On Dec 6, 11:32 am, "Blackadder" wrote:
Do you use the spray during the day?

I used a similar spray and it ended up burning my roses - but it was on
account of the sun's heat. If I had done it in the evening or very early
morning it doesn't happen.

BD


Pyrethrins are also quite oily which probably intensifies the problem
of spraying in hot weather.