Preparation method of a medicament for preventing and treating rubber tree corynesporium leaf defoliation disease

Abstract

The invention relates to a preparation method of a medicament for preventing and treating Corynediosporium leaf defoliation disease of rubber tree. The method comprises the following steps: 1) Weighing water thread grass, adding 3-6 times the weight of ethanol with a concentration of 70-90% by volume Aqueous solution, heated and refluxed for 1-3 hours, filtered, ethanol was recovered from the filtrate under reduced pressure, and concentrated until no ethanol was recovered to obtain extract 1; , heating under reflux for 3-6 hours, cooling to room temperature, filtering, adding ethanol to the filtrate until the ethanol content is 50-80% by volume, standing for 12-48 hours, filtering, recovering ethanol from the filtrate under reduced pressure, and concentrating to Extract 2 was obtained until no ethanol was recovered; 3) Combined extracts. The medicament for preventing and treating the Corynesporium leaf defoliation of the rubber tree described in the present invention is a better medicament for preventing and controlling the Corynesporium leaf defoliation of the rubber tree in the field, and its effect is better than some common fungicides.

Description

technical field [0001] The invention relates to the field of rubber, in particular to a preparation method of a medicament for preventing and treating Corynesporium leaf defoliation of rubber trees. Background technique [0002] Rubber tree Corynesporium leaf defoliation is a devastating disease that can harm rubber seedlings, saplings and mature trees, and damage leaves, young shoots and twigs of all ages, causing leaves to fall off, bark to burst, and young shoots to wither. The disease in the nursery hinders the thickening of the seedlings and fails to meet the budding requirements; the infected saplings repeatedly lose their leaves, the crown is exposed, the plants are dwarfed or even die; the infection of the tapping trees seriously reduces the dry rubber production. At present, the disease often occurs in rubber producing areas, which seriously threatens the normal operation of the downstream rubber industry. Contents of the invention [0003] The object of the pres...

AI Technical Summary

Problems solved by technology

The disease in the nursery hinders the thickening of the seedlings and fails to meet the budding requirements; the infected saplings repeatedly lose their leaves, the crown is exposed, the plants are dwarfed or even die; the infection of the tapping trees seriously reduces the dry rubber production

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