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Method for relieving toxic hazard of amide herbicide to rice by using zanthoxylum bungeanum extract

A technology of extracting amide herbicides and Zanthoxylum bungeanum, which is applied to the use of amide herbicide safeners in rice, and in the field of extracting amide herbicide safeners, which can solve problems such as damage and achieve good compatibility and detoxification effects Significant, harm-mitigating effect

Active Publication Date: 2013-04-24
HUNAN AGRICULTURAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country is also very concerned about this topic, but the synthesis and biological activity of safeners are still in the incomplete stage, and there is no report about the use of plant-based safeners to alleviate the damage of amide herbicides to rice.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The following examples further illustrate the present invention. The following are the results of indoor bioassays, but they should not be regarded as limiting the scope of application of the present invention in any way.

[0026] First dry the fruit of Zanthoxylum bungeanum, crush it at low temperature, pass through a 30-50 mesh sieve, then extract 5 kg of the crushed Zanthoxylum bungeanum fruit with supercritical carbon dioxide, use ethanol as the entraining agent, and the usage amount is 5-10 times of the sample amount. The extract was collected, concentrated by rotary evaporation in a water bath at 45°C under reduced pressure to obtain 250g of the extract (1g of the extract is equivalent to 20g of dried fruit of Zanthoxylum bungeanum), and sealed and stored at 4°C.

[0027] Put 200g of air-dried soil in a 13cm×8cm×5cm plastic box, add 100ml of tap water, soak the rice seeds at 28°C for 24 hours, and accelerate germination at 30°C for 12 hours. 15 grains were cultiva...

Embodiment 2

[0033] Field efficacy evaluation of detoxification of metolachlor to rice, Zanthoxylum bungeanum extract by supercritical carbon dioxide extraction, ethanol as entrainer.

[0034] Extraction method: according to the extraction method described in the summary of the invention to obtain the pepper extract

[0035] Rice Variety: T You 259

[0036] Metolachlor: 96% Metolachlor EC

[0037] The paddy rice was sowed on August 3, 2010, and treated with chemicals when the seedlings grew to the one-leaf stage. The treatment method was to spray the seedlings uniformly and directionally, and the amount of metolachlor per mu was 5g. Victims can be observed after 4 days of chemical treatment, and phytotoxicity is obvious after 10 days, showing underdeveloped root system and dwarfing of plants, which are obviously lower than the plant height of untreated rice at the same growth period. And use 5g metolachlor and Zanthoxylum bungeanum extract per acre according to 16g / m 2 The dosage was mi...

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PUM

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Abstract

The invention relates to a method for relieving toxic hazard of amide herbicide to rice by using zanthoxylum bungeanum extract, which comprises the following steps of: crushing dry zanthoxylum bungeanum fruits, screening the crushed zanthoxylum bungeanum, selecting an alcoholic organic solvent as an entrainer, extracting the zanthoxylum bungeanum by using supercritical carbon dioxide, and obtaining extract after concentration; and directly spraying the diluted zanthoxylum bungeanum extract on the rice or soil where the amide herbicide is applied. The zanthoxylum bungeanum extract can protect the rice from suffering from the toxic hazard of the amide herbicide, is safe for crops, and has no pollution to the environment.

Description

field of invention [0001] The invention relates to a method for extracting an amide herbicide safener from plant materials, in particular to a safener and a method for using the same, more specifically, the present invention relates to the use of the amide herbicide safener on rice. Background technique [0002] Amide herbicide is a high-efficiency, broad-spectrum selective herbicide, mainly used for dryland crops to control annual grass weeds and some broad-leaved weeds. Amide herbicides are particularly active in paddy fields. However, because rice is extremely sensitive to most amide herbicides, amide herbicides are easy to cause phytotoxicity to young rice when used in paddy fields, so the application of amide herbicides in paddy fields is strictly limited. Herbicide safeners are a class of substances that can reduce the toxicity of herbicides to crops, reduce or eliminate the damage of herbicides to crops by increasing the tolerance of sensitive crops. Under the premi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/32A01N37/22A01N37/26A01P13/00
Inventor 柏连阳吴景周小毛
Owner HUNAN AGRICULTURAL UNIV
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