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Method for preventing rice from poisoning by acetochlor

A technology of acetochlor and rice is applied in the field of alcoholic chuanxiong extract, which can solve the problems such as the safener being in the initial stage, and achieve the effects of obvious detoxification effect, good compatibility and obvious detoxification effect.

Inactive Publication Date: 2008-06-11
HUNAN AGRICULTURAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our country is also very concerned about this topic, but the synthesis and biological activity of safeners are still in their infancy.
However, there is no report about alleviating the damage of acetochlor to rice with phytosafeners

Method used

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  • Method for preventing rice from poisoning by acetochlor

Examples

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Embodiment 1

[0025] The following examples are further descriptions of the present invention, and 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] Firstly, the Rhizoma Chuanxiong plant material was dried at 60°C, crushed, passed through a 40-mesh sieve (aperture 0.47mm), and stored in a refrigerator (0-4°C) for later use. Weigh 20g of plant material fine powder and place it in a 250mL Soxhlet extractor, add 200mL of 95% ethanol, reflux extraction in a water bath at 86-88°C for 8h, concentrate to obtain 20mL of extract (equivalent to dry powder 1g / mL), place in Store in the refrigerator until ready to serve.

[0027] Put 200g of air-dried soil in a 13cm×8cm×5cm plastic box, and add 100mL of tap water. Rice seeds were first treated with 0.1% HgCl 2 Sterilize for 15 minutes, soak in water at 28°C for 24 hours, accelerate germination at 30°C for 12 hours, select seeds of the s...

Embodiment 2

[0033] Field efficacy evaluation of protecting rice from acetochlor poisoning, taking the ethanol extract of Ligusticum chuanxiong as an example.

[0034] Extraction method: obtain the ethanol extract of Rhizoma Chuanxiong according to the extraction method described in the content of the invention (a)

[0035] Rice variety: Peiliangyou 288

[0036] Acetochlor: 90% Acetochlor EC

[0037] Paddy rice was sown on June 21, 2004, and when the seedlings grew to 3 leaves and 1 heart, chemical treatment was carried out. The treatment method was to carry out uniform and directional spraying on the seedlings, and spray 90% acetochlor EC 30mL per mu to dilute with 40kg of water. 7 days after the application, it was found that rice had obvious phytotoxicity, and the symptoms of phytotoxicity were dwarfing of plants, underdeveloped root system, and the plant height of rice was significantly lower than that of untreated rice in the same growth period, while spraying 90% acetochlor per mu ...

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Abstract

The present invention relates to a kind of Ligusticum wallichii extract for preventing rice from poisoning of acetochlor. Ligusticum wallichii material, after being stoved, crushed, sieved, is refluxed in some container with alcohol as organic solvent in water bath to extract, and the extract is obtained after concentration. The Ligusticum wallichii extract is water diluted and sprayed directly to rice or soil after applying metolachlor to protect rice from poisoning of acetochlor with safety to crop and no environmental pollution.

Description

field of invention [0001] The invention relates to a safener for the herbicide acetochlor, which can protect rice from the harm of acetochlor, more specifically, the invention relates to an alcoholic chuanxiong extract that can protect rice from the poison of acetochlor. Background technique [0002] Among the chloroacetamide herbicides, acetochlor has a higher herbicidal activity and a wide range of applications. It is a high-efficiency, broad-spectrum selective pre-emergent soil treatment herbicide, which is effective for controlling annual grass weeds. At present, my country has successfully applied acetochlor and its mixture to control weeds in rice fields. However, because rice is sensitive to acetochlor, acetochlor is likely to cause phytotoxicity to young rice when used in paddy fields, so the application of acetochlor in paddy fields is strictly limited. Herbicide safeners are a class of substances that can reduce the toxicity of herbicides to crops, increase the tol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/32
Inventor 柏连阳刘承兰陈桂华
Owner HUNAN AGRICULTURAL UNIV
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