It seemed to work well for me the one time I needed it!
By the eay, I started that by buying some "insecticidal soap" in a spray bottle. But the "spray bottle" was more like a dribble glass, and wasted the soap in a slow, wide stream that ran right off the leaves.
I transferred it to a better spray bottle, that sent a fine mist at high speed. That covered the plant more fully, and efficiently.
But I suspect the soapy spray did more good than the "special" insecticidal soap. I suspect that plain dish-washing liquid was just about as insecticidal as the fancier soap.
