Efficient agricultural herbicide

A herbicide and agricultural technology, applied in the agricultural field, can solve the problems of unpredictable weeding effect, conflict of chemical components, reduction of wheat yield, etc.

Inactive Publication Date: 2016-06-15
石鸿娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the pesticides used against wheat grass weeds mainly include clodinafop-propargyl, fenoxaprop-p-ethyl, chlorotoluron, isoproturon and isoproturon·chlorotoluron, etc. It has been proved by the practice of production and application that these The pesticide has a good control effect on hard grass in the wheat field and ordinary Aurantium, but only 30-40% of the control effect on Japanese Amygrass and Azalea
Judging from the herbicide varieties currently on the market, so far there is no single agent or compound agent product with excellent control effect on wheat field oystergrass and japonica. When weeding, we can only mix and match different herbicides according to our own experience,

Method used

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  • Efficient agricultural herbicide
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Compound (I) Separation Preparation and Structure Confirmation

[0018] Sources of reagents: ethanol, petroleum ether, ethyl acetate, n-butanol, and dichloromethane were of analytical grade, purchased from Shanghai Lingfeng Chemical Reagent Co., Ltd. Methanol, of analytical grade, were purchased from Jiangsu Hanbang Chemical Reagent Co., Ltd.

[0019] Preparation method: (a) Grind the dried and mature seeds (1kg) of wangbuliuxing, extract with 85% ethanol under hot reflux, combine the extracts, concentrate until there is no alcohol smell, and successively add petroleum ether, ethyl acetate and water-saturated n-butanol extraction to obtain petroleum ether extract, ethyl acetate extract and n-butanol extract respectively; % ethanol for 6 column volumes, then 75% ethanol for 10 column volumes, collect the 75% ethanol eluate, concentrate under reduced pressure to obtain the 75% ethanol eluate extract; (c) in step (b) The 75% ethanol eluted extract was separated...

Embodiment 2

[0022] Embodiment 2: preparation and herbicidal effect of herbicide

[0023]Take an appropriate amount of solvent DMSO to dissolve isoproturon and compound (I), then dilute with tap water, the molar concentration of isoproturon is 80 μg / ml, and the molar concentration of compound (I) is 320 μg / ml. The molar concentration of the compound (I) is 3 to 5 times that of the isoproturone.

[0024] How to use: Spray twice a week.

[0025] To investigate index to the inhibition rate of wheat field sage, japonica, chickweed, cow chickweed, test group one and test group two are set respectively, test group one sprays the herbicide provided by the present invention, and test group two weed control The dose contained only isoproturon at the same concentration as the test group one. The trial period is 1 month. The results are shown in the table below.

[0026]

[0027] The results show that in the herbicide of the present invention, compound (I) has played a very important ro...

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PUM

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Abstract

The invention discloses an efficient agricultural herbicide which comprises isoproturon and a compound extracted and separated from the seed of cowherb.The compound is of a novel structure.The compound is reported for the first time.The invention further provides a preparation method of the compound.The preparation method comprises the steps of smashing dried herb of siebold buttercup, ethyl alcohol heat reflux extraction, solvent liquid-liquid extraction, ethyl acetate extract impurity removal through macroporous resin, separation of positive-phase silica gel and reverse-phase silica gel and the like.Test results prove that the herbicide can selectively restrain growth of annual grassy weed such as beckmannia syzigachne in wheat field and Japanese amur foxtail and other and broad-leaf weed such as starwort and malachium aquaticum.

Description

technical field [0001] The invention belongs to the field of agriculture, and in particular relates to a high-efficiency agricultural herbicide. Background technique [0002] Wheat, rice, corn, etc. are the most important food crops in my country. The level of food production is directly related to national food security, social stability and harmony. For wheat, the main crop species in the north, the disorderly growth of vicious weeds such as hardgrass, kanmai, Japanese kanmai, and weeds seriously affects the yield of wheat. Among them, in recent years, the area and severity of the damage caused by Aurantia miltiorrhiza and Weedgrass in Japan have increased year by year. In a few areas, the wheat yield of individual fields has lost as much as 20-30%, and the most serious fields have formed grass shortages. The damage is imminent and has become one of the most important problems in the field of wheat pest prevention. [0003] At present, the pesticides used against wheat g...

Claims

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Application Information

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IPC IPC(8): A01N47/30A01N35/06A01P13/00
CPCA01N47/30A01N35/06A01N2300/00
Inventor 石鸿娟
Owner 石鸿娟
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