Plant pathogen inhibitor combinations and methods of use

摘要

Combinations, compositions and methods of use for modulating plant pathogen infection using plant extracts containing anthraquinone derivatives which induce resistance to plant phytopathogens and an antimicrobial agent, a biological control agent and/or a surfactant having fungicidal activity.

主权项

1. A synergistic combination for use in modulation of 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 structurewherein R1, R2, R3, R4, R5, R6, R7 and R8 are hydrogen, hydroxyl, hydroxylalkyl, halogen, carboxyl, alkyl or sugar and
(b) at least one chemical pesticide selected from the group consisting of a single site anti-fungal agent and a multi-site non-inorganic, chemical fungicide wherein the amounts of Reynoutria extract and at least one chemical pesticide in said combination provide for synergism of modulation of phytopathogenic infection, wherein the synergism is measured by determining E/Ee and E/Ee is at least 1.2.