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A plant protection agent and a method for slowing down the phytotoxicity of industrial hemp

A technology of hemp seeds and herbicides, applied in the field of pesticides, can solve problems such as phytotoxicity

Active Publication Date: 2018-06-26
HUNAN AGRI BIOTECH RES CENT +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 field, but the synthesis and biological activity research of the safener is still in its infancy, and there is no report about the use of plant safeners to alleviate the phytotoxicity of amide herbicides on industrial hemp

Method used

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  • A plant protection agent and a method for slowing down the phytotoxicity of industrial hemp
  • A plant protection agent and a method for slowing down the phytotoxicity of industrial hemp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A plant protection agent for industrial hemp, the plant protection agent is the Rhizoma Chuanxiong extract, and the Rhizoma Chuanxiong extract is prepared by the following method:

[0035] (1) drying Rhizoma Chuanxiong at 75°C, pulverizing, passing through a 40-60 mesh sieve to obtain crushed Ligusticum Chuanxiong;

[0036] (2) Pass the Rhizoma Chuanxiong powder through CO 2 The supercritical fluid method is used for extraction, the extraction temperature is 60°C, the extraction pressure is 30MPa, and the extraction time is 2h to obtain the Rhizoma Chuanxiong extract;

[0037] (3) Separating the Rhizoma Chuanxiong extract for the first time at 8MPa and 55°C, and then separating it for the second time at 5MPa and 50°C to obtain the Rhizoma Chuanxiong extract, and the extraction rate of Rhizoma Chuanxiong is 5%. , sealed and placed in a 4°C refrigerator for use.

Embodiment 2

[0039] A kind of herbicide, described herbicide is made up of 2g of pure metolachlor, 2g of Ligusticum chuanxiong extract prepared in Example 1, and 1L of water.

Embodiment 3

[0041] A method for slowing down the harm of refined metolachlor to industrial hemp, said method is: first spraying the aqueous solution of refined metolachlor whose concentration of refined metolachlor is 2g / L when the cannabis breaks ground and germinates , and then spray the Rhizoma Chuanxiong extract concentration as the plant protection agent aqueous solution of 2g / L.

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Abstract

The invention relates to the technical field of pesticide, and in particular to a plant protection agent and a method for alleviating phytotoxicity on industrial hemp. The plant protection agent is a Ligusticum wallichii extract obtained by CO2 super critical fluid extraction method, and the safe dosage of the plant protection agent is greater than 0 and less than or equal to 200 g / L. The plant protection agent can be directly sprayed to industrial hemp or soil, which has S-metolachlor applied, and can also be mixed with S-metolachlor single agent or S-metolachlor compound agent to prepare a herbicide for industrial hemp; the herbicide can be sprayed directly in the industrial hemp or soil. Both of the application methods can achieve good effect of mitigating the phytotoxicity of S-metolachlor on industrial hemp.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a plant protection agent and a method for alleviating the injury of industrial hemp. Background technique [0002] S-metolachlor belongs to chloroacetamide herbicides. It is a high-efficiency and broad-spectrum selective pre-emergent herbicide. It is mainly used in dry crop fields such as corn, soybean peanut, and industrial hemp to control annual grass weeds. Grasses and most broadleaf weeds. However, because industrial hemp is sensitive to amide herbicides including metolachlor, metolachlor will affect the emergence rate when used in industrial hemp fields, and it is easy to produce drug on young industrial hemp seedlings. Harmful, so that the application of refined metolachlor in industrial hemp fields is limited. Herbicide safeners are a class of chemical substances with unique properties that selectively protect crop surfaces from herbicide damage without affecting the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/32A01N37/22A01P13/00
Inventor 柏连阳邬腊梅周小毛王立峰李祖任刘佳李静波黄勤勤
Owner HUNAN AGRI BIOTECH RES CENT