Monday, September 24, 2007

Lime sulfate

Anne, I was listening to you and Mike one Sat a.m., and wrote the words "lime sulfate" on a sliver of paper. I think it had something to do with roses. What are the benefits and for which plant?

Thanking you in advance....

Kay W. of Cary

Anne's response:

I think we were probably talking about Lime sulfur that is used as an organic control of disease and insects. It can be used to control powdery mildew on roses when they leaf out in the spring and is used during the dormant season as a control for aphids, mites and scale. I use lime sulfur in February when I cut back roses as a control for black spot. It should not be used when the air temperature is above 85F. Lime sulfur is actually the chemical Calcium polysulfide.

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