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Herbicide

A herbicide, fenflumezone technology, applied in the field of chemical herbicides and herbicides for the control of broad-leaved weeds and sedge weeds in rice fields, can solve the problems of not wide herbicide spectrum, reduced rice production, and high cost of pesticides , to achieve obvious spread-spectrum synergies, speed up weeding, and improve safety

Active Publication Date: 2014-06-04
ZHEJIANG TIANFENG BIOLOGICAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using one herbicide alone has a poor herbicidal spectrum, can not control a variety of weeds, and the cost of pesticides is high
At present, many weeds have developed resistance to sulfonylurea herbicides. Coupled with long-term chemical weeding, many weeds in paddy fields have transformed into malignant weeds, seriously affecting the yield of rice, resulting in a reduction in rice production. even failure

Method used

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Examples

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Comparison scheme
Effect test

Embodiment 1

[0015] The table below shows the combination of pyrazosulfuron-methyl and mefentrazone with stems and leaves to control wild water chestnuts.

[0016]

[0017] The test results show that the combination of pyrazosulfuron-methyl and mefentrazone is synergistic, and the mixed use or compounding of the two agents is beneficial to control weeds. When the dose of mefentrazone is 18 ga.i. / hm 2 Small red spots appeared on rice leaves. The mixed dosage range is: pyrazosulfuron-methyl 30-60 ga.i. / hm 2 + Mefentrazone 6-15 ga.i. / hm 2 , the mixed dosage range of pyrazosulfuron-methyl and mefentrazone is between 1:0.1 and 1:0.5.

Embodiment 2

[0019] Choose pyrazosulfuron-methyl and carfentrazone mixed ratio of 60+12ga.i. / hm 2 (that is, the ratio is 1:0.2) to conduct rice safety tests. According to the results of rice plant height and tillering, the dosage of pyrazosulfuron-methyl and mefentrazone mixed with stems and leaves can reach 60 ga.i. / hm 2 , the safety factor for rice was greater than 3, indicating that the combination of pyrazosulfuron-methyl and mefentrazone in rice fields was safe for rice.

Embodiment 3

[0021] 25% pyrazosulfuron-methyl, 5% mefentrazone, 3% auxiliary agent BX, 2.5% auxiliary agent LS, 1% agricultural dispersant NNO, kaolin added to 100%, made into 30% wettable powder.

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Abstract

The invention relates to an herbicide, which comprises pyrazosulfuron-ethyl and carfentrazone-ethyl as active components, and conventional pesticide assistant and filler. The herbicide is characterized in that the mass ratio of pyrazosulfuron-ethyl to carfentrazone-ethyl is 1 to (0.1-0.5), and the herbicide can be made into different preparations with different contents of active components. The herbicide provided by the invention is mainly used for removing weeds in rice paddy field, has distinct broad-spectrum synergistic action and strong weed removal activity, and has good preventive effect on Thickculm spikesedge and other destructive weeds and resistant weeds in rice paddy field, so as to well protect rice growth, reduce use amount and cost and improve environment and food safety. The herbicide is suitable for the situation of China.

Description

technical field [0001] The invention relates to a herbicide, in particular to a herbicide prepared by pyrazosulfuron-methyl and mefentrazone, which belongs to the chemical herbicide for controlling broad-leaved weeds and Cyperaceae weeds in paddy fields, and belongs to the technical field of pesticides . Background technique [0002] Carfentrazone-ethyl (carfentrazone-ethyl) trade name: fast methazine, chemical name: (RS)-2-chloro-3-{2-chloro-5-[4-(difluoromethyl)-4,5-di Hydrogen-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorophenyl}propanoic acid ethyl ester. This product was developed by FMC Corporation of the United States and is mainly used to control broad-leaved weeds. It belongs to the triazolinone herbicide. It can cause cell membrane damage by inhibiting the protoporphyrinogen oxidase in the process of weed chlorophyll biosynthesis, so that the leaves dry up quickly. Death, because its half-life in the soil is only a few hours, so it is safe for the next crop. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N47/36A01N43/653A01P13/00
Inventor 范伟赠赵梅勤祁月月
Owner ZHEJIANG TIANFENG BIOLOGICAL SCI
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