Methods for weed control using plants having dicamba-degrading enzymatic activity
First Claim
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1. A method for controlling weed growth in a crop-growing environment comprising:
- a) applying a herbicidally effective amount of an auxin-like herbicide to a crop-growing environment;
b) planting a transgenic seed of a dicotyledonous plant comprising a nucleic acid encoding a polypeptide having dicamba-degrading enzymatic activity in soil of the crop-growing environment within 21 days of applying the herbicide; and
c) allowing the seed to germinate into a plant.
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Abstract
The invention provides methods for weed control with dicamba and related herbicides. It was found that pre-emergent applications of dicamba at or near planting could be made without significant crop damage or yield loss. The techniques can be combined with the herbicide glyphosate to improve the degree of weed control and permit control of herbicide tolerant weeds.
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Citations
60 Claims
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1. A method for controlling weed growth in a crop-growing environment comprising:
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a) applying a herbicidally effective amount of an auxin-like herbicide to a crop-growing environment; b) planting a transgenic seed of a dicotyledonous plant comprising a nucleic acid encoding a polypeptide having dicamba-degrading enzymatic activity in soil of the crop-growing environment within 21 days of applying the herbicide; and c) allowing the seed to germinate into a plant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for controlling a glyphosate tolerant weed in a field comprising:
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a) planting a transgenic seed in a field comprising a glyphosate tolerant weed or a seed thereof, wherein the seed comprises a transgene conferring glyphosate tolerance and a transgene encoding dicamba monooxygenase, the transgene encoding dicamba monooxygenase which displays dicamba-degrading enzymatic activity comprising a nucleic acid sequence selected from the group consisting of (1) a nucleic acid sequence encoding the polypeptide of SEQ ID NO;
6, (2) a nucleic acid sequence comprising the sequence of SEQ ID NO;
5, and (3) a nucleic acid sequence encoding a polypeptide with at least 90% sequence identity to the polypeptide of SEQ ID NO;
6, wherein the polypeptide has dicamba monooxygenase activity;b) growing the seed into a plant; and c) treating the field with an amount of an auxin-like herbicide and glyphosate effective to control weed growth of the glyphosate tolerant weed. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A method for controlling weed growth in a field comprising:
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a) applying a herbicidally effective amount of an auxin-like herbicide other than dicamba to a field, wherein the field comprises a transgenic dicotyledonous plant comprising a nucleic acid encoding a polypeptide having dicamba degrading enzymatic activity or is planted with a seed that germinates into said transgenic dicotyledonous plant within 21 days of applying the herbicide, wherein the herbicidally effective amount is an amount that does not damage the transgenic dicotyledonous plant but will damage a plant of the same genotype that lacks the nucleic acid encoding a polypeptide having dicamba degrading enzymatic activity, wherein the nucleic acid is selected from the group consisting of (1) a nucleic acid sequence encoding the polypeptide of SEQ ID NO;
6, (2) a nucleic acid sequence comprising the sequence of SEQ ID NO;
5, (3) a nucleic acid sequence encoding a polypeptide with at least 90% sequence identity to the polypeptide of SEQ ID NO;
6, wherein the polypeptide has dicamba monooxygenase activity; andb) allowing the transgenic dicotyledonous plant to grow. - View Dependent Claims (40, 41, 42, 43, 44, 45)
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46. A method for increasing the efficiency of use of a herbicide delivery device comprising:
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a) obtaining a device that has been used to deliver a first composition comprising an auxin-like herbicide; b) delivering a second composition to the field using the device without first completely washing the device so that a herbicide residue comprising the auxin-like herbicide remains in the device and is delivered with the second composition to the field, wherein the field comprises a transgenic dicotyledonous plant expressing a nucleic acid encoding dicamba monooxygenase which displays dicamba-degrading enzymatic activity or is planted with a seed that germinates into said transgenic dicotyledonous plant, and wherein the herbicide residue is present in an amount that does not damage the transgenic dicotyledonous plant but will damage a plant of the same genotype that lacks the nucleic acid encoding dicamba monooxygenase which displays dicamba-degrading enzymatic activity. - View Dependent Claims (47, 48, 49, 50, 51, 52)
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53. A method for controlling weed growth in a crop-growing environment comprising:
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a) planting a transgenic seed in a field comprising a weed or a seed thereof, wherein the transgenic seed comprises a transgene conferring glyphosate tolerance and a transgene conferring dicamba tolerance; b) treating the field with a herbicidally effective amount of dicamba, glyphosate, or a mixture thereof, wherein the planting and the treating is done in a single pass through the field; and c) growing the transgenic seed into a plant. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60)
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Specification