Bavachin with plant epiphyte resisting activity

Abstract

An anti-phytopathogenic fungi activity psoralen flavanone relates to a compound, in particular to anti-phytopathogenic fungi activity psoralen flavanone. The preparation process of the compound comprises drying psoralen seeds, coldly soaking and extracting industrial alcohol four times, decompressing and condensing leachate to obtain alcohol extract, mixing solution with appropriate amount of water, extracting with petroleum ether and acetic acid ethyl ester in turn, taking acetic acid ethyl ester to extract position extract, conducting silica gel column chromatography, eluting in gradient with petroleum ether-acetic acid ethyl ester, separating to obtain psoralen flavanone (petroleum ether: acetic acid ethyl ester =85:15). The compound can be used as bactericide to prevent various plant diseases such as valsa mali, physalospora piricola nose, pyricularia oryzae, rhizoctonia solani AG-1 IA, cucumber fusarium oxysporum, gibberella zeae, cucumber anthracnose and phytophthora parasitica and the like.

Description

technical field [0001] The invention relates to a compound for resisting plant fungus diseases, in particular to a kind of anti-plant fungus active psoralen dihydroflavone. Background technique [0002] Psoralen dihydroflavone (bavachin) is effective against apple rot fungus, apple ring spot fungus, rice blast fungus, rice sheath blight fungus, cucumber wilt fungus, wheat scab, cucumber anthracnose fungus, and pepper phytophthora fungus, etc. Common plant diseases have good antibacterial activity. The above-mentioned plant diseases are seriously harmful to my country's agricultural production. According to expert reports, the direct economic losses caused by apple ring spot damage in my country reach 3 billion to 5 billion yuan each year; rice blast is the most serious damage to rice in the world's rice fields. It is one of the diseases that generally cause a 10% to 20% reduction in rice production. Taking my country as an example, since the 1990s, the annual occurrence area...

AI Technical Summary

Problems solved by technology

[0003] At present, the use of chemical pesticides is still an effective measure to prevent and control the above-mentioned plant diseases, but due to the long-term use of some conventional varieties, the pathogenic bacteria develop resistance, resulting in an increase in the amount of pesticides used in the field, causing great harm to human health and the ecological environment.

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