Plant extract with herbicidal activity and application of plant extract
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A technology of herbicidal activity and extracts, applied in the fields of application, plant growth regulators, herbicides and algicides, etc., to achieve significant social and economic benefits
Active Publication Date: 2017-07-14
SOUTH CHINA AGRI UNIV
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Problems solved by technology
[0005] However, different plants and their active ingredients also have different targets and herbicidal effects
Method used
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Embodiment 1
[0035] Example 1 Preparation of bald fir organic solvent extract——methanol extract
[0036] The stem bark of Pine fir is dried at 50°C, crushed and passed through a 60-mesh sieve, and then the dry powder is placed in a container, and 3 times the volume of methanol (m / v) is added for extraction for 48-72 hours. The extraction was repeated 3 times, and the filtrates were combined and concentrated to obtain the methanol extract of bald fir.
Embodiment 2
[0037] Example 2 Preparation of bald fir steam distillate - essential oil
[0038] Sieve the bark of the stem bark of Chinese fir balata after crushing, put 500g of dry powder into a 1000mL round bottom flask, add 800mL of double-distilled water, and heat it in an electric furnace for steam distillation to obtain the essential oil of Chinese fir baldness.
Embodiment 3
[0039] Example 3 The weeding experiment of bald fir on red thistle, ghost needle grass and crabgrass
[0040] 1. Experimental method
[0041] (1) Experimental plants: take red thistle (dicot weed), ghost needle grass (dicot weed), crabgrass (monocot weed) as examples for research.
[0042](2) In order to clarify the herbicidal activity of bald fir, the "small cup method" was used to measure its inhibitory effect on different weeds. Put 2-3 layers of glass beads at the bottom of a disposable small plastic cup, add 5mL of a certain concentration of bald fir methanol extract, put 10 germinated seeds in each small cup, seal it with plastic wrap, and leave some small holes on the film for ventilation . Set the concentration gradient as: 200, 100, 50, 25, 12.5 and 0 μg / mL, and repeat each concentration three times. After the treatment, put the cuvette into a light incubator at a temperature of 26° C., a light of 4000 lux, and a photoperiod of 16:8.
[0043] (3) After 7 days, roo...
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Abstract
The invention discloses Taiwania flousiana Gaussen with herbicidal activity and an application of Taiwania flousiana Gaussen and an application of a Taiwania flousiana Gaussen extract as a herbicide. The research finds that the Taiwania flousiana Gaussen and the Taiwania flousiana Gaussen extract have the efficacies of remarkably inhibiting germination, synthesis of chlorophyll a and growth of multiple classical farmland weeds, invasive weeds and aquatic weeds such as crab grass, amaranthus retroflexus, tropic ageratum herb, feather cockscomb, Bidens pilosa, mikania micrantha, Pistia stratiotes and spirogyra, have remarkable inhibition effects, can be applied to the prevention and kill-off of the farmland weeds and can be developed into efficient and pollution-free environment-friendly herbicides, or a lead compound is provided for the creation of novel herbicides; and the Taiwania flousiana Gaussen and the Taiwania flousiana Gaussen extract have remarkable social and economic benefits and good application prospects.
Description
technical field [0001] The invention belongs to the technical field of biopesticides, and in particular relates to a herbicidally active plant, the bald fir, and the application of the bald fir and its extract as a herbicide. Background technique [0002] Herbicides are widely used in the agricultural field to control harmful plants such as weeds, shrubs, and trees in farmland, orchards, flower nurseries, grasslands and non-cultivated land, railway lines, rivers, reservoirs, warehouses, etc. The excessive use of herbicides has caused serious harm to the human body, other organisms, and the environment. [0003] my country is extremely rich in plant resources, and it is also an early country in the research and application of botanical pesticides. Botanical pesticides have the characteristics of not destroying the ecological environment, target pests are not easy to develop resistance, safe for non-target organisms, and the mode of action of active ingredients is specific, s...
Claims
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