Active constituent of curcuma longa for inhibiting and killing plant pathogenic fungi and its preparation and application

Abstract

The present invention discloses an inhibiting and killing plant pathogenic fungi active constituent of curcuma longa and its preparation and application. The active component is extract extracted by ethanol or methanol from curcuma longa or fine extract extracted further by n-hexane based on the extract extracted by ethanol or methanol. The inhibiting and killing plant pathogenic fungi active constituent of curcuma longa can be prepared inhibiting and killing plant pathogenic fungi and mushroom pathogenic fungi preparation, especially prepared preparation for inhibiting and killing phorna wasabiae Yokogi, sclerotinia sclerotiorum, tomato botrytis cinerea, verticillium, wheat phytoalexin, edible fungi mycogone perniciosa, olive green mycophenolate or P. pallidum. The preparation formulations can be water solution, soluble powder, wettable powder, thick suspending agent and granule. The active components disclosed by this present invention has extensive source of raw materials, no-toxic, easy degradation features, can be developed a non-pollution botanical inhibiting and killing fungi preparation.

Description

technical field [0001] The present invention relates to plant pesticide technology, more specifically, relates to a plant extract active ingredient for inhibiting and killing plant pathogenic fungi, its preparation method and application. Background technique [0002] Before the use of chemically synthesized pesticides, many of the earliest pesticides were extracted from plants, and the natural active substances of some plants have been developed into commercial pesticides, such as rotenone and nicotine. However, since the 1940s, organic chemical synthetic pesticides have replaced botanical pesticides and dominated the market, causing the research on botanical pesticides to fall into a slump. At present, more than 80% of the pesticides used in China are chemical preparations. These chemical pesticides have played an important role in reducing plant diseases and insect pests and increasing crop yields, but at the same time they have also brought about environmental pollution,...

AI Technical Summary

Problems solved by technology

However, almost all of the botanical pesticides registered today are insecticides, and there are very few preparations that inhibit and kill phytopathogenic fungi. In agricultural production, phytopathogenic fungi are extremely harmful to plants, which is an obstacle to increasing agricultural production and farmers' income. Therefore, there is an urgent need to provide more varieties of pesticide preparation products that can effectively inhibit and kill plant pathogenic fungi, are environmentally friendly and can ensure the safety of humans and animals, so as to increase farmers' income