Application of Angelica pubescens Maxim. f. Biserrata Shan et Yuan extract in reducing of phytotoxicity of herbicide to crops

A technology of extracts and herbicides, applied in the field of application of lovage extracts as safeners in protecting crops from herbicide damage

Inactive Publication Date: 2016-06-15
HUNAN AGRICULTURAL UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports about its application in agriculture. So fa

Method used

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  • Application of Angelica pubescens Maxim. f. Biserrata Shan et Yuan extract in reducing of phytotoxicity of herbicide to crops

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example relates to the laboratory test of the extract of lovage in reducing the toxic effect of the amide herbicide acetochlor on rice

[0026] 1) Preparation of Radix Lovosa Extract: Grind the dried root and stem of Rhizoma Rhizoma into powder, pass through a 100-mesh sieve; weigh 100g of Rhizoma Rhizoma Rhizoma, use 95% ethanol as the extraction solvent, reflux extract in a water bath at 90°C for 6-8 hours, concentrate Obtain 20g paste extract;

[0027] 2) Pretreatment of the lovage extract: Dissolve 0, 1.25, 2.5, 5, 7.5, 12.5, 25 mg / kg of the lovage extract and 0.025 mg / kg of the herbicide acetochlor in 0.5 mL of ethyl acetate, respectively, Add water to prepare a mixed solvent, then add 0.1g Tween-80 to disperse;

[0028] 3) The effect of the chemical agent on the crops: the tested rice is Jinyou 207, which has been sterilized by sodium hypochlorite before use, and the soil is sterilized and dry soil free from pesticides and other chemical substances. Weigh 2...

Embodiment 2

[0035] Barrel Planting Test of the Extract of Lovola in Removing the Toxicity of Acetochlor to Rice

[0036] Acetochlor: 900g / L acetochlor EC

[0037] Rice for testing: Jinyou 207

[0038] Select a paddy field that has not been applied with acetochlor, and divide the area into 20m 2 district. The rice seeds are sown in plots after germination, and treated with pesticides when the seedlings grow to the one-leaf stage. The treatment method is poisonous soil method, and the dosage is 1g of acetochlor per mu. The phytotoxicity could be observed 4 days after the application, and the phytotoxicity was obvious after 1 week, showing that the plants were dwarfed, and the plant height was significantly lower than that of the untreated rice at the same growth stage. After 6 weeks, it can be clearly found that compared with the untreated rice at the same growth stage, the number of tillers is less. However, 1 g of acetochlor and 200 g / mu of lovage extract per mu were mixed with soil, ...

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Abstract

The invention relates to new application of an Angelica pubescens Maxim. f. Biserrata Shan et Yuan extract. The extract is obtained by drying, smashing and sieving Angelica pubescens Maxim. f. Biserrata Shan et Yuan, extracting by using an alcohol substance, and concentrating. By using the Angelica pubescens Maxim. f. Biserrata Shan et Yuan extract and a composition thereof for crops, the crops can be protected from the phytotoxicity of a herbicide; the extract can be used for preparing a safe herbicide.

Description

technical field [0001] The invention belongs to the fields of natural medicinal chemistry and pesticides, and specifically relates to the application of a lovage extract as a safener in protecting crops from herbicide damage. Background technique [0002] Amide herbicides are a class of high-efficiency, broad-spectrum selective herbicides, most of which are mainly used in dryland crops to control annual grass weeds and some broad-leaved weeds, and are currently one of the most widely used herbicides in the world . However, some of these varieties are prone to phytotoxicity to wheat, tobacco, rice, etc., especially in paddy fields. Since rice is extremely sensitive to most amide herbicides, amide herbicides are likely to cause phytotoxicity to young rice when used in paddy fields. Harm, so that 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 e...

Claims

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Application Information

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IPC IPC(8): A01N37/22A01N37/26A01N25/32A01P13/00
CPCA01N37/22A01N25/32A01N37/26A01N2300/00
Inventor 胡利锋柏连阳周小毛罗坤刘开林刘祥英刘敏王立峰
Owner HUNAN AGRICULTURAL UNIV
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