The leaves, stems and roots of Dichondra were all damaged when the disease occurred, and irregular yellow spot appeared, even the whole leaf withered. At the beginning, the disease of the Yellow affected turf was mild, but with the development of the disease, the withered and yellow turf would gradually expand.
Generally speaking, sclerotia is the main cause of the disease. Under the condition of high temperature and high humidity from July to August, the disease is most likely to occur. In addition, the soil rich in organic matter is also conducive to the occurrence of the disease.
When the outbreak of Sclerotium Blight of horseshoe can be controlled by fungicides, 1% bacteria and 1000 times liquid or 25% times of fresh liquor can be used to control the occurrence and development of diseases.
The main symptom of horseshoe rust is to produce reddish brown powdery sore spots or stripe spots on the stems and leaves, and then turn into dark brown. Generally, in April, the rust began to spread, first appeared on the leaves, expanded to the whole plant in summer, and when it was serious, it could make the lawn wither and die.
When horseshoe appears rust, nitrogen fertilizer can be avoided in summer. It can also be treated with 20% Triadimefon emulsion or 40% carbendazim suspension.
When the disease occurs, the main symptoms of the affected plants are round brown or light brown spots. With the disease deepening, the disease will become large spots, especially the high temperature and humidity in summer, or the improper application of nitrogen fertilizer, which will aggravate the disease and cause large areas of bald lawn.
When the disease occurs, it can be treated by digging out the soil in the infected area and disinfecting with 40% pentachloronitrobenzene powder. Secondly, pay attention to the drainage in rainy season. 75% chlorothalonil wettable powder can be used to prevent and treat serious diseases.
