Patent ID: 8883227

Claim:
A synergistic combination for use in modulation of a phytopathogenic infection comprising: (a) an extract derived from a Reynoutria sp. plant, wherein said extract comprises one or more anthraquinone derivatives that induce plant resistance to phytopathogens, wherein said derivative (i) has the structure wherein R1, R2, R3, R4, R5, R6, R7 and R8 are hydrogen, hydroxyl, hydroxylalkyl, halogen, carboxyl, alkyl, or sugar; and (b) acibenzolar-S-methyl; wherein the amounts of the Reynoutria extract and acibenzolar-S-methyl in said combination provide for synergism of modulation of phytopathogenic infection, and wherein the synergism is measured by determining E/Ee and E/Ee is at least 1.2.