No. Cheap liquid detergent works just as well.
This experiment has been repeated every year at LSU for decades. We did it in Charlie Johnson's plant propagation class when I was an undergrad. http://www.lsuagcenter.com/en/communica ... hnson1.htm
Detergent, not to be confused with soap, is a surfactant. It works by making water"wetter", allowing it to interact with oil and grease. It breaks down the surface tension, hence the name surfactant. Soap is made from plant and animal fats. Detergents/Surfactants are a petrochemical product.
Surfactant is added to water and herbicide to break down the surface tension of the mixture. There is no difference in doing it with brand name surfactant or dollar store surfactant, the surface tension is still broken.
This experiment has been repeated every year at LSU for decades. We did it in Charlie Johnson's plant propagation class when I was an undergrad. http://www.lsuagcenter.com/en/communica ... hnson1.htm
Detergent, not to be confused with soap, is a surfactant. It works by making water"wetter", allowing it to interact with oil and grease. It breaks down the surface tension, hence the name surfactant. Soap is made from plant and animal fats. Detergents/Surfactants are a petrochemical product.
Surfactant is added to water and herbicide to break down the surface tension of the mixture. There is no difference in doing it with brand name surfactant or dollar store surfactant, the surface tension is still broken.