Method for alleviating toxicity of metolachlor to rice

A metolachlor and rice technology, applied in the directions of botanical equipment and methods, animal repellents, biocides, etc., can solve the problems of safeners in the initial stage, etc., achieve good detoxification effect, good compatibility, damage mitigation 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, it has not been reported yet about alleviating the damage of metolachlor to rice with plant safener

Method used

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  • Method for alleviating toxicity of metolachlor to rice

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Experimental program
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Embodiment 1

[0026] 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.

[0027] Firstly, the 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 1g / mL of dry powder), place Store in the refrigerator until ready to use.

[0028] 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 same size and sow them...

Embodiment 2

[0034] Field efficacy evaluation of detoxification of metolachlor to rice, taking the ethanol extract of Asarum as an example.

[0035] Extraction method: obtain the ethanol extract of Herba Asarum according to the extraction method described in the content of the invention (a)

[0036] Rice variety: Peiliangyou 288

[0037] Metolachlor: 72% Metolachlor EC

[0038] 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 directional spraying on the seedlings, and spray 72% metolachlor EC 120mL per acre after mixing 40kg of water 7 days after the application, it was found that the rice had obvious phytotoxicity, and the phytotoxicity symptoms were dwarfing of the plants, underdeveloped root system, and the plant height of the rice was significantly lower than that of the untreated rice at the same growth period, while spraying 72% isotropic per mu The dilution o...

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PUM

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Abstract

The present invention relates to a kind of asarum herb extract for alleviating toxicity of metolachlor to rice. Asarum herb 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 asarum herb extract is water diluted and sprayed directly to rice or soil after applying metolachlor to protect rice from poisoning of metolachlor with safety to crop and no environmental pollution.

Description

field of invention [0001] The invention relates to a method for extracting the metolachlor safener from plant materials, in particular to the safener and its application method, more specifically, the present invention relates to the use of the metolachlor safener on rice. Background technique [0002] Metolachlor belongs to the group of chloroacetamide herbicides. It is a highly efficient and broad-spectrum selective pre-emergent soil treatment herbicide. It is mainly used for dryland crops to control annual grass weeds and some broad-leaved weeds. Metolachlor has particularly high activity in paddy fields. At present, metolachlor has been successfully used for weed control in transplanted rice fields in my country. However, because rice is sensitive to metolachlor, metolachlor is likely to cause phytotoxicity to young rice when used in paddy fields, so that the application of metolachlor in paddy fields is strictly limited. Herbicide safeners are a class of substances tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/32
Inventor 柏连阳刘国华许丽娟
Owner HUNAN AGRICULTURAL UNIV
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