Uses of thaxtomin and thaxtomin compositions as herbicides
View Patent ↗There is a need for a selective, low-risk herbicide that can be used to control weeds in cereal cultures and turf. The present invention discloses that a bacterial secondary metabolite, thaxtomin and optionally another herbicide is an effective herbicide on broadleaved, sedge and grass weeds. Thaxtomin A and structurally similar compounds can be used as natural herbicides to control the germination and growth of weeds in cereal, turf grass, Timothy grass and pasture grass cultures with no phytotoxicity to these crops. As a natural, non-toxic compound, thaxtomin can be used as a safe alternative for weed control in both conventional and organic farming and gardening systems.
1. A synergistic herbicidal composition comprising two herbicides having a synergistic effect, wherein
a first herbicide is thaxtomin having a concentration of from 0.01 to 5.0 mg/ml and
a second herbicide is atrazine having a concentration of from 0.01 to 50 mg/ml.
2. The combination according to claim 1 , wherein said thaxtomin has the following composition:
wherein R 1 is methyl or H, R 2 is hydroxy or H, R 3 is methyl or H, R 4 is hydroxy or H, R 5 is hydroxy or H, R 6 is hydroxy or H, and combinations thereof.
3. The composition according to claim 1 , wherein said thaxtomin has a concentration of between 0.2-0.4 mg/ml.
4. The composition according to claim 1 , wherein said thaxtomin has a concentration of between 0.3-0.4 mg/ml.
5. A method for using the synergistic herbicidal composition according to claim 1 , comprising applying the synergistic composition to a weed.
6. A method for modulating growth of monocotyledonous, dicotyledonous and sedge weeds and aquatic weeds selected from the group consisting of Ammania sp., Alisma plantago-aquatica, Cyperus sp., and Leptochloa sp., comprising applying to said weeds or soil a synergistic herbicidal composition comprising two herbicides having a synergistic effect, wherein a first herbicide is thaxtomin having a concentration of from 0.01 to 5.0 mg/ml and
a second herbicide is atrazine having a concentration of from 0.01 to 50 mg/ml.
7. The method according to claim 6 , wherein the weed is selected from the group consisting of Chenopodium sp., Abutilon sp., Helianthus sp., Ambrosia sp., Amaranthus sp., Convolvulus sp., Brassica sp., Taraxacum sp., Solanum sp., Malva sp., Setaria sp., Bromus sp., Poa sp., Lolium sp., Festuca sp., Echinochloa sp., Cyperus sp., Scirpus sp., Erodium sp., Sagittaria sp., Capsella sp., Galinsoga sp., Oxalis sp., Trifolium sp., Stellaria sp., Eclipta sp., Cardamine sp., Lamium sp., Senecio sp., and Rorippa sp.
8. The method according to claim 6 , wherein the weed is selected from the group consisting of Echinochloa phyllopogon, Poa annua, Cyperus difformis, Scirpus mucronatus, Cyperus esculentus, Erodium cicutarium, Brassica juncea, Chenopodium album, Sagittaria montevidensis, Abutilon theophrasti, Capsella bursa-pastoris, Galinsoga ciliata, Solanum ptychanthum, Oxalis pes-caprae, Trifolium hirtum, Helianthus annuus, Malva parviflora, Stellaria media, Convolvulus arvensis, Eclipta alba, Cardamine hirsuta, Lamium amplexicaule, Senecio vulgaris, Rorippa islandica, Cardamine flexuosa , and Taraxacum officinale.
9. The method according to claim 6 , wherein said monocotyledonous, dicotyledonous and sedge weeds are modulated in a cereal growth system.
10. The method according to claim 6 , wherein the cereal growth system is a rice growth system.