Preparation method of pesticide for preventing and treating red root diseases of hevea brasiliensis

Abstract

The invention relates to a preparation method of a pesticide for preventing and treating red root diseases of hevea brasiliensis. The method comprises the following steps: 1) weighing rauvolfia verticillata, adding an ethanol water solution, heating to carry out reflux extraction, filtering the extracting solution, recovering ethanol from the filtrate at reduced pressure and concentrating the filtrate until ethanol is completely recovered, thus obtaining an extracting solution 1; 2) weighing dryopteris austriaca, adding water, heating under the condition of reflux, cooling the solution to the room temperature, filtering the solution, adding ethanol to the filtrate until the ethanol content is 50-80%, standing at the room temperature and filtering the filtrate, thus obtaining an extracting solution 2; 3) weighing populus pseudo-simonii, adding ethanol absolute, hermetically standing at the room temperature, then adding water until the ethanol content is 30-80%, standing at the room temperature, filtering the solution, heating the filtrate under the condition of reflux and cooling the filtrate to the room temperature, thus obtaining an extracting solution 3; 4) weighing cluster mallow fruit, adding water, heating the solution under the condition of reflux, cooling the solution to the room temperature and filtering the solution, thus obtaining an extracting solution 4; and 5) mixing the extracting solutions 1-4, thus obtaining the pesticide. The pesticide for preventing and treating red root diseases of hevea brasiliensis is a better one used in the fields and has better effects than some common chemical agents.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a method for preparing pesticides for preventing and treating red root disease of rubber trees. Background technique [0002] Red root disease is the most serious disease among the seven root diseases of rubber trees in my country, and it is also one of the most serious diseases of rubber trees in the world. The disease damages the root or root neck of the rubber tree, causing the leaves to become small and yellow, the crown to be sparse, the trunk to shrink, the root to rot, and then the whole plant to die, which seriously shortens the economic life of the rubber plantation and reduces the rubber production. According to the survey of rubber producing areas in my country, there are about 600,000 rubber trees with red root disease, and the annual loss of dry rubber is about 19.08 million tons. Since the 1870s, the control agent of rubber tree red root disease has been using w=25% propicona...

AI Technical Summary

Problems solved by technology

Since the 1870s, the control agent of rubber tree red root disease has been using w=25% propiconazole aqueous emulsion to prevent rubber tree red root disease, but there are still few types of agents to choose from.

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