Synergistic herbicidal methods and compositions

A composition and compound technology, applied in the directions of botanical equipment and methods, animal repellents, plant growth regulators, etc., can solve the problems of incompletely satisfactory suspension and concentrated compositions, and achieve overcoming incompatibility problems, Improved control, lower application rates

Inactive Publication Date: 2000-10-18
AMERICAN CYANAMID CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, emulsifiable suspension concentrate compositions are not entirely satisfactory because they require the use of heavy aromatic solvents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Evaluation of the herbicidal activity of glyphosate and imazethapyr compound

[0067] In this evaluation, pitted morning glory plants (Ipomoea lacunosa) were grown in standard greenhouse soil to reach the six-leaf stage. The plants were then sprayed with an aqueous solution of the test compound using a nozzle operated at a pressure of 30 psi for a predetermined time to give an application rate in the range of 20 g / ha to 720 g / ha. Each treatment was repeated 3 times. After spraying, the plants are placed on greenhouse shelves and tended in a manner comparable to standard greenhouse practices. Four weeks after treatment, the plants were assayed and the % weed control was recorded relative to the untreated control (check). Also 4 weeks after treatment, the height of the plants was measured and the % drop in height was recorded relative to the height of the untreated comparative. To measure the height of a plant is to straighten the vine (vine) and measure the distance f...

Embodiment 2

[0079] Evaluation of Herbicidal Activity of Compounds of Glyphosate and Imazapic

[0080] In this evaluation, pitted morning glory (Ipomoea lacunosa) was grown in a 1:1 mixture of sandy loam and masonry sand until it reached the five-leaf stage. Then, with CO 2 A pressurized sprayer sprays an aqueous solution of the test compound over the plants. Each experiment was repeated 4 times. After spraying, the plants are placed on greenhouse shelves and tended in a manner comparable to conventional greenhouse practices. At 4 weeks after treatment, the plants were visually inspected and the % weed control relative to the untreated comparative was recorded. Also 4 weeks after treatment, the number of leaves was counted and the % leaf reduction relative to the untreated comparative was recorded. After visual evaluation, the plants were excised at the soil surface, and the excised plants were weighed and determined. The fresh weight and height of the plants were reported as % weight...

Embodiment 3

[0088] Evaluation of the herbicidal activity of the compound of glyphosate and Imazamox

[0089] Using essentially the same method as described in Example 2 above, pit morning glory plants at the five-leaf stage were treated with the test compound and evaluated 3 weeks after treatment. Each treatment was repeated 4 times. The data were averaged and shown in Tables V and VI below.

[0090] Test compound Source glyphosate, isopropyl ammonium salt ROUNDUP  ULTRA 1 Imazamox RAPTOR 2

[0091] 1 Made by Monsanto

[0092] 2 Manufactured by American Cyanamid Co.

[0093] Table V - Evaluation of Weed Control Glyphosate Imazamox % Weed Control g / ha g / ha Observed Expected (Obs.-Exp.) 1 0 0 0 - 0 8.97 5.00 - 0 17.93 32.50 - 0 26.90 66.25 -560.4 0 7.50 -560.4 8.97 45.00 12.13 32.88 * 560.4 17.93 78.75 37.63 41.13 * 560.4 26.90 78.75 68.81 9.94 1 LSD(0.05) = 15.55 * Synergy, ie (obs.-exp.) > LSD

[0094] Table VI - Assessment of Fresh Weight ...

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PUM

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Abstract

The present invention provides a method for the synergistic control of undesirable plants such as Ipomoea, Cyperus, Sida and Euphorbia which comprises applying to the plants or their locus a synergistically effective amount of a combination of glyphosate and an imidazolinone compound. Further provided are synergistic herbicidal compositions comprising glyphosate and an imidazolinone compound, and specifically concentrated aqueous herbicidal compositions of imidazolinyl acid salts and glyphosate salts.

Description

background of the invention [0001] Certain weeds, such as Ipomoea, Cyperus, Sida and Euphorbia, are particularly difficult to control. Their all-seasonal competitive performance can reduce crop yields and lead to significant economic losses in row crop production. One of the most commonly practiced methods of controlling these troublesome weeds is the seedling application of herbicides. However, no single-species selective herbicides are currently available for economical control of these weeds. [0002] Glyphosate [(N-phosphonomethyl)glycine] is a highly effective herbicide with a broad spectrum of activity. However, certain agriculturally important weed species require higher levels of glyphosate for effective control. High levels of glyphosate increase selection pressure, which is undesirable. Glyphosate tolerance, especially in Ipomoea spp., is a well-recognized problem in the art. Accordingly, there is a great need for new weed control methods and compositions that c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/50A01N57/20A01N25/02
CPCA01N57/20A01N43/50A01N25/02A01N2300/00A01N43/40
Inventor K·N·德卡瓦略卡斯特罗W·门东萨T·马莱夫伊特F·P·萨尔茨曼R·M·沃特金斯
Owner AMERICAN CYANAMID CO
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