Plant pathogen inhibitor combinations and methods of use
View Patent ↗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.
1. 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.
2. The synergistic combination of claim 1 , wherein the combination is a composition.
3. The synergistic combination of claim 1 , wherein the E/Ee is at least 1.6.
4. The synergistic combination of claim 1 , wherein the phytopathogenic infection is a fungal infection.
5. The synergistic combination of claim 1 , wherein the Reynoutria sp. is Reynoutria sachalinensis.
6. A method for modulating a phytopathogenic infection in a plant comprising applying to the plant and/or seeds thereof and/or substrate used for growing said plant an amount of the combination of claim 1 effective to modulate said phytopathogenic infection.
7. The method of claim 6 , wherein the E/Ee is at least 1.6.
8. The method of claim 6 , wherein the phytopathogenic infection is a fungal infection.
9. The method of claim 6 , wherein the Reynoutria sp. is Reynoutria sachalinensis.