Effects of different fractions of Rheum palmatum root extract and anthraquinone compounds on herbicidal, fungicidal, and insecticidal activities

This study was conducted to evaluate suppression of crop pathogens, the acaricidal activities against the two-spotted spider mite (Tetranychus urticae) and the weed control efficacy of solvent fractions of Pheum palmutum extract. In addition, determined the inhibitory activities of the main bioactive substances of Rheum palmatum (aloe-emodin, emodin, chrysophanol and physcion) against crop pathogens.