Anti-plant pathogenic fungi composition and its preparation method

Abstract

The invention belongs to the pesticide science field, and relates to an anti- plant pathogenic fungi compositionQCZ-28 and its preparation method; the composition is consist of three main components of 3-(3,4-dimethyl benzoyl)propionic acid, p-heptylphenol and p-(2-amino ethyl)with similar proportion, the main components is prepared by purifying a low polar part of a celery seeds ethanol extract under certain condition through chromatogram. According to the invention, the natural antifungal composition QCZ-28 extracted in vegetable seed celery seeds possesses high inhibition rate on Rhizoctonia solani, Fusarium oxysporum and Alternaria alternate, substantial effect on antibiosis function and no adverse influence on human body and environment.

Description

technical field [0001] The invention belongs to the field of pesticide science and relates to anti-plant fungal pesticides, in particular to an anti-phytopathogenic fungus composition (QCZ-28) and a preparation method thereof. Background technique [0002] According to reports, phytopathogenic fungi can cause yield reduction of food crops, rust spots on leaves or fruits of vegetable crops, and cause great harm to agricultural production. For example: Rhizoctonia solani is a soil pathogenic fungus with a wide range of hosts, which can cause diseases on various crops and vegetables such as rice, corn, cotton, sugar beet, potato, wax gourd and cucumber, resulting in rotten roots and stems or rotting leaves and other disease symptoms, in view of this, currently commonly used pesticides are chemical pesticides such as tolclofos-methyl EC, tolclofos and agricultural antibiotics, but the results of use show that there are still many diseases; Fusarium oxysporum (Fusarium oxysporum...

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Problems solved by technology

[0002] According to reports, phytopathogenic fungi can cause yield reduction of food crops, rust spots on leaves or fruits of vegetable crops, and cause great harm to agricultural production

For example: Rhizoctonia solani is a soil pathogenic fungus with a wide range of hosts, which can cause diseases on various crops and vegetables such as rice, corn, cotton, sugar beet, potato, wax gourd and cucumber, resulting in rotten roots and stems or rotting leaves and other disease symptoms, in view of this, currently commonly used pesticides are chemical pesticides such as tolclofos-methyl EC, tolclofos and agricultural antibiotics, but the results of use show that there are still many diseases; Fusarium oxysporum (Fusarium oxysporum) infects banana plants, known as banana Panama disease, which can cause wilting and death of the entire banana plant. Crops such as tomatoes, cucumbers, and cotton can also be infected with this fungus and cause wilt; Alternaria alternata infects tobacco leaves, causing tobacco Red spot disease is the main disease of tobacco leaves in the late stage of maturity, which seriously affects the quality of tobacco leaves. This fungus harms the fruit, forming irregular brown lesions, which are sunken, and black moldy things grow on them, leading to papaya black rot, Peach, Apple and Pear Black Spot

[0003] At present, the pesticides used against the above-mentioned fungi in China are mainly chemical drugs. Professionals believe that the large-scale use of these chemical drugs will cause damage to biodiversity. Pollution to the living environment, the use of vegetable crops will cause pesticide residues, harm to human health, etc.

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