MySheen

Prevention and control of impatiens mosaic disease

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, The symptoms occur in the rhizome. At first, it became brown and constricted at the rhizome, and then caused the symptom of standing blight. General flower beds in the rainy season, potted flowers are too wet, the disease is more. Pathogen PhytophthoranicotianaevanBredadeHaanvar.parasitica (Dastur) Waterhouse transmission route and disease conditions the pathogen overwintered in the soil in seeds or in the form of mycelium and oospore.

The symptoms occur in the rhizome. At first, it became brown and constricted at the rhizome, and then caused the symptom of standing blight. General flower beds in the rainy season, potted flowers are too wet, the disease is more.

Pathogen PhytophthoranicotianaevanBredadeHaanvar.parasitica (Dastur) Waterhouse

Transmission routes and disease conditions of pathogens overwintered in seeds or in mycelia and oospores in the soil, and spread by wind, rain and irrigation water, the pathogens infected seedlings and caused lodging. In the adult stage, Rain Water was more, and the humidity was high. The suitable temperature for the development of the pathogen was 27-31 ℃, the highest was 36 ℃ and the lowest was 10 ℃. In case of overcast and rain or high humidity, or heavy soil viscosity, low-lying terrain and serious disease of continuous cropping.

Prevention and cure method

1. Remove the diseased leaves and increase the application of phosphorus and potassium fertilizer.

2. Spray 75% Chlorothalonil 8 clear wettable powder 500-600 times liquid, or 40% triethylphosphonate aluminum (ethyl phosphate aluminum) wettable powder 200 times liquid, 70% ethyl phosphine o manganese zinc wettable powder 500 times liquid, 58% metalaxyl o manganese zinc 400-500 times liquid, 72.2% Pulike water agent 700-800 times liquid, 64% poison alum wettable powder 500 times liquid.

 
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