Antiviral biopesticide sourcing from Eupatorium adenophorum spreng and preparation method thereof

Abstract

The invention discloses an antiviral biopesticide sourcing from Eupatorium adenophorum spreng, which is an extract obtained by leaching Eupatorium adenophorum spreng powder with organic solvent, rotatably evaporating and metering volume. The mass concentration of the extract is 1g / ml. The biopesticide is prepared according to the following steps: (1) drying the fresh leaves of the Eupatorium adenophorum spreng in shade, baking until reaching constant weight, and then grinding the leaves into powder; (2) adding organic solvent into the Eupatorium adenophorum spreng powder according to the volume ratio of 1:10, and extracting to obtain filter liquor; (3) rotatably evaporating the filter liquor obtained in step (2) into a cream extract; and (4) metering the volume of the paste extract obtained in step (3) to obtain Eupatorium adenophorum spreng extract with the mass concentration of 1g / ml. The technical scheme of the invention solves the defect that the existing traditional chemical agent pesticide can damage environment during preventing and curing plant viruses, and has simple preparation method, low production cost and no poison and pollution.

Description

Technical field [0001] The invention belongs to the technical field of biological pesticides, and specifically relates to a biological pesticide that uses Eupatorium adenophorum to manufacture a tobacco mosaic virus-resistant biological pesticide and a preparation method thereof. Background technique [0002] In agricultural production, viral diseases are the second largest type of plant diseases after fungi (Zhao Shanhuan (editor). Phytochemical protection (third edition) [M]. Beijing Agricultural Press, 2000.), the largest in the world Some crops are harmed to varying degrees. Due to the difficulty of prevention and control, it is known as "plant cancer". According to relevant reports (Wu Juwen, Chen Jianfeng. Botanical pesticides and their safety [J]. Plant Protection, 2002, 28(4): 39-41.), in the early 1980s, only the United States was affected by plant viruses every year The agricultural economic loss caused by the disease is as high as 1.5 to 2 billion U.S. dollars, and th...

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Problems solved by technology

[0010] The purpose of the present invention is to solve the problem that the existing traditional chemical reagent pesticides will cause damage to the environment when preventing and controlling plant viruses, and the pesticides themselves are not easy to degrade; while some existing plant-derived biological pesticides are not invasive plants themselves, There is no serious threat to the environment and agricultural and forestry production, and the defects of little application value provide a biopesticide made by using the invasive plant Eupatorium adenophorum and its preparation method

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