Agent for prevention and treatment of Platanus orientalis powdery mildew, and application method thereof

Abstract

The invention relates to an agent for prevention and treatment of Platanus orientalis powdery mildew. The agent comprises Chinese rhubarb, common cnidium fruit, common knotgrass herb, Datura stramonium, pomegranate, Evodia rutaecarpa, Chinese prickly ash and gentrin knotweed. According to the invention, the agent is prepared through the following steps: washing and cleaning the above-mentioned components, then carrying out drying in the air, carrying out crushing into fine powder; then carrying out extraction with absolute ethyl alcohol for three times, and concentrating extracted filtrate through a rotary evaporation device until no solvent is evaporated so as to obtain the agent. When in use, the agent is diluted with clear water according to a weight ratio of 1: 200, and the diluted agent is used to spray the whole plant by an electrostatic sprayer; and the agent has the following advantages: antibacterial property of inoculation in a laboratory can reach more than 95%; in actual use, the agent can effectively prevent and treat powdery mildew; prevention rate of the agent under continuous spraying reaches 90%; in incidence of the powdery mildew, cure rate of the agent reaches more than 93%; and the agent has good efficacy and is free of residues and resistance.

Description

technical field The invention belongs to the technical field of sycamore planting, in particular to a sycamore powdery mildew control agent and its application method. Background technique Sycamore is a deciduous tree with a height of up to 30 meters and dark gray bark. The flowering period is from April to May, and the fruiting period is from September to October. , Well-drained soil, the leaves have the effect of absorbing toxic gases and stagnant dust, and the survival rate of large-scale planting is extremely high, which can effectively improve the surrounding environment. The sycamore is a plant with strong disease resistance during the growth process, and the incidence rate is low. However, in recent years, the powdery mildew of the sycamore has a tendency to increase year by year. It is mainly caused by fungi and damages leaves, new shoots and buds. The onset occurs from May to June every year. Small round spots appear on the front or back of the early leaves and gr...

AI Technical Summary

Problems solved by technology

The above items 1, 2, and 3 belong to routine treatment, and the symptoms cannot be cured. After long-term and large-scale use of chemical agents in the last item, the treatment effect will decline and the recurrence rate will be extremely high.

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