The simplest form of non-chemical control is to wipe and wash affected plant parts with lukewarm water and soap, insecticidal soap or dish soap, one tablespoon per gallon of water; strong soaps or detergents may damage the plant. This can also be sprayed if the plant is large but is much less effective than when combined with physical removal. After allowing the soap to sit for a while the sooty mold is rinsed off with a hose/ water. Sooty mold will regrow, unless the underlying reason for its growth is eliminated.