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Pyrazosulfuron and carfentrazone-ethyl compound herbicides

A technology of pyrazosulfuron-methyl and carfentrazone, which is applied in the field of compound herbicides, can solve the problems of difficult to achieve effective control and not wide herbicidal spectrum, achieve rapid weed death, expand herbicidal spectrum, and delay The effect of speed of succession

Inactive Publication Date: 2009-06-17
徐宝玉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a pyrazosulfuron-methyl for the actual problem that the herbicidal spectrum is not wide in the process of controlling broad-leaved weeds in paddy fields by using pyrazosulfuron-methyl or mefentrazone alone, and it is difficult to achieve the purpose of effective control. ·Metafenone compounded herbicide

Method used

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  • Pyrazosulfuron and carfentrazone-ethyl compound herbicides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Preparation of 20% pyrazosulfuron-metazone wettable powder (effective drug mass ratio 1:0.8), DMF is selected as the auxiliary agent, and kaolin is selected as the filling material. Each component is prepared according to mass percentage: pyrazosulfuron-methyl 11.11%, mefentrazone 8.89%, DMF about 8%, and kaolin in an appropriate amount.

[0017] (2) Preparation process: fully stir pyrazosulfuron-methyl 11.11g, metosulfuron 8.89g and additives, and then fill it with kaolin to 100g, and then continue to stir evenly to obtain 20% pyrazosulfuron-metazone wettable powder.

Embodiment 2

[0019] Synergistic Bioassay:

[0020] (1) Weeds for testing: the carp sausage seedlings collected in the direct-seeding paddy field of Jianhu County Agricultural Science Institute, and transplanted to four 2m 2 In the rectangular (direct-directed rice field) plots, other weeds were pulled out, and 50 plants were planted in each plot.

[0021] (2) Tested drug: 20% pyrazosulfuron-methyl-metazone wettable powder is provided by embodiment 1, effective drug ingredients pyrazosulfuron-methyl 11.11%, mefentrazone 8.89% (effective drug ingredient mass ratio is 1: 0.8).

[0022] (3) Comparative drug: 10% pyrazosulfuron-methyl wettable powder (produced by Jiangsu Golden Phoenix Agrochemical Co., Ltd.), 40% mefentrazone water-dispersible granule (produced by FMC Company of the United States, sub-packed by Suzhou Fumishi Plant Protection Agent Co., Ltd. ).

[0023] (4) Test method: Dilute the drug to be tested and two comparison drugs to a certain concentration first, then calculate th...

Embodiment 3

[0028] Field efficacy test results.

[0029] In 2008, in the direct-seeding rice test field of Jianhu County Agricultural Science Institute, on July 10, the peak of broad-leaved weeds, the above-mentioned test drug and comparative drug were sprayed respectively, and the effect investigation was carried out 10 days after the application: 20% Pyrazosulfuron Methazone wettable powder according to 15g / 667m 2 Spray 40kg of water, the weeding effect is 94.61%; 10% pyrazosulfuron-methyl wettable powder is 20g / 667m 2 Spray 40kg of water, the herbicidal effect is 73.33%; 2 Spray 40kg of water, its weeding effect is 80%. The compound herbicide has the functions of significant synergism, accelerated weed killing speed and reduced cost.

[0030] The above-mentioned examples are not specific limitations on the present invention. In practice, the mass ratio of pyrazosulfuron-methyl and mefentrazone as effective active ingredients is selected between 1:0.53-1.2. The content of the active...

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Abstract

The invention belongs to a herbicide for controlling broad-leaved weeds in a rice paddy field and relates to a compositional phytocide the effective activity compositions of which are pyrazosulfuron-ethyl and carfentrazone-ethyl. The herbicide comprises effective activity compositions, additive and kaoline, and is characterized in that the effective activity compositions are pyrazosulfuron-ethyl and carfentrazone-ethyl with a mass ratio of 1:0.53-1.2, preparations with different contents thereof, and a plurality of dosage forms.The invention possesses the advantages that the compositional result of pyrazosulfuron-ethyl and carfentrazone-ethyl has effects of obvious synergism, improvement of weed-killing speed and the control of broad-leaved weeds in a rice paddy field. The phytocide of the present invention has low toxicity and low residual, the weed-killing spectrum is widened, dosage, phytocide applying times and cost are reduced evidently, and the phytocide is in favor of delaying the succession veiocity of weed community.

Description

Technical field: [0001] The invention belongs to a chemical herbicide for controlling broad-leaved weeds in paddy fields, and relates to a compound herbicide whose active ingredients are pyrazosulfuron-methyl and mefentrazone. Background technique: [0002] Chemical herbicides are one of the main measures for farmers to fight against farmland weeds and obtain high yields of crops. For a long time to come, it is inevitable to spray chemical herbicides to control field weeds, reduce labor intensity, and improve crop yield. Yield. [0003] In order to protect food safety, protect the environment, and protect human health, the research and development and application of chemical herbicides are developing in the direction of high efficiency, low toxicity, and low residue. Scientific researchers at all levels have made fruitful efforts for it. High-efficiency, low-toxicity, and low-residue chemical herbicide varieties welcomed by farmers continue to emerge. [0004] The continuo...

Claims

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Application Information

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IPC IPC(8): A01N47/36A01N43/653A01P13/00
Inventor 徐宝玉刘学进张守成刘琴
Owner 徐宝玉
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