Plant source bacteriocide for agriculture

Abstract

The invention relates to an agricultural bactericidal agent, especially relating to an agricultural bactericidal agent prepared with extract of psoralen to prevent rice blast for rice, late blight for tomato and potato, chilli epidemic disease and gray mold for cucumber and so on. The total extract of psoralen can be got by chemical extracting method, for example, extracting with ethanol of 95%, or methanol or water or organic solvent from psoralen seed powder, then condensing and getting the total extract. Dissolving the total extract in water or acetone or dimethyl sulfoxide or organic solvent to prepare mother liquid. The bactericidal agent is characterized by high efficiency, low toxicity and residual and hard for drug resistance.

Description

technical field [0001] The present invention relates to a plant-sourced agricultural fungicide, in particular to an extract of psoraleae for preventing and treating rice blast, tomato late blight, potato late blight, pepper phytophthora, cucumber gray mold and other common fungicides. Botanical agricultural fungicides for plant diseases. Background technique [0002] Rice blast (Blast Fungus) is one of the most serious rice diseases in the world's rice fields. The disease can cause damage to rice all year round. Its damage spreads to all parts of rice. Leaf pillow blast, node rice blast, ear neck blast, branch blast and grain blast, etc. Generally, rice production is reduced by 10% to 20%. Taking my country as an example, since the 1990s, the annual occurrence area of ​​the disease has been more than 3.8 million hm2, and the annual loss of rice has reached hundreds of millions of kilograms. [0003] Tomato late blight is a devastating vegetable disease in the world. The U...

AI Technical Summary

Problems solved by technology

[0004] At present, the use of resistant varieties and the use of chemical pesticides are still effective measures to prevent and control plant diseases. The toxicity of pesticides and the resistance of pathogenic bacteria, resistant varieties and the use of chemical pesticides are subject to certain restrictions in production. For this reason, biological control of plant diseases such as rice blast, tomato late blight, potato late blight, and pepper phytophthora In particular, the research and development of biological pesticides is the need for the sustainable development of agricultural production